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Izmira turkeyi Bulnes, 2010 Fig. 5H Izmira turkeyi Bulnes, 2010: 17, 20, figs 7���8. Type locality TURKEY: Alsancak Harbour, Izmir Bay, Aegean Sea. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes absent. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores located very close to each other (in same body third). MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in second body third. Ejaculatory duct unarmed, without stylet, but with penis rod. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like and oriented backwards. Lang���s vesicle absent. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found in sublittoral mussel beds of Mytilus galloprovincialis. Distribution Aegean Sea, Turkey., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 21-22, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Bulnes V. N. 2010. Five new Polycladida (Platyhelminthes: Acotylea) species from the Aegean Sea with remarks on the prostatic structures. Journal of Natural History 44 (9): 515 - 544. http: // dx. doi. org / 10.1080 / 00222930903497535"]}

Melloplana ferruginea (Schmarda, 1859) Fig. 6C Polycelis ferruginea Schmarda, 1859: 22, pl. IV, fig. 48. Discocelis binoculata Verrill, 1901: 43 ���44, pl. 5, figs 3���4. Notoplana bahamensis Bock, 1913: 208���210, pl. VI, figs 2���3. Notoplana caribbeana Hyman, 1939: 2 ���4, figs 3���8. Notoplana binoculata ��� Hyman 1939: 8 ���10, figs 13���14. Leptoplana ferruginea ��� Diesing 1862: 530. Notoplana ferruginea ��� Stummer-Traunsfels 1933: 3486, 3521 ���3522, fig. 60. Melloplana ferruginea ��� Faubel 1983: 117. Type locality BERMUDA: Long Bird Island. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two groups. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in second body third. Ejaculatory duct unarmed, without stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle without projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs absent. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Enlarged Lang���s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found under stones and on algae, e.g., Halimeda. Distribution Bermuda., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 23-25, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Schmarda L. K. 1859. Neue wirbellose Thiere beobachtet und gesammelt auf einer Reise um die Erde 1853 bis 1857. Bd I: Turbellarien, Rotatorien und Anneliden. W. Engelmann, Leipzig. http: // dx. doi. org / 10.5962 / bhl. title. 85313","Bock S. 1913. Studien ueber Polycladen. Zoologiska bidrag fran Uppsala 2: 31 - 344.","Diesing K. M. 1862. Revision der Turbellarien. Abtheilung: Dendrocoelen. Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften in Wien 44: 485 - 578. http: // dx. doi. org / 10.5962 / bhl. title. 2108","Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121.","Marcus E. 1952. Turbellaria Brasileiros (10). Boletim da Faculdade de Filosofia, Ciencias e Letras Universidade de Sao Paulo 10: 85 - 86.","Kato K. 1937. Polyclads collected in Idu, Japan. Japanese Journal of Zoology 7: 2 ll- 232."]}

Persica qeshmensis Maghsoudlou, Bulnes & Rahimian, 2015 Fig. 5I Persica qeshmensis Maghsoudlou, Bulnes & Rahimian, 2015: 10, 12, figs 2–6, 7a–c. Type locality IRAN: Persian Gulf, Qeshm Island. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with dots. Smooth dorsal surface. Nuchal tentacles present, small. Tentacular knobs absent. Marginal eyes absent. Tentacular eyes at base of or within tentacles. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus enclosed within muscular bulb, oriented backwards and located in second body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Lang’s vesicle absent. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found in the intertidal zone along the Iranian coast of the Persian Gulf. Distribution Iran, Persian Gulf.

Laqueusplana gen. nov. urn:lsid:zoobank.org:act: DFBD1007-F9CA-46D8-8A8A-9827B9045040 Figs 1���4, 6 A���B Type species Laqueusplana bocki gen. et sp. nov. Diagnosis Pleioplanidae with tentacular and cerebral eye clusters; without tentacles. Male copulatory apparatus directed forward. Seminal vesicle and/or spermiducal bulbs present; penis duct forms a loop between prostatic vesicle and pharynx. Penis stylet long and pointed. Female apparatus usually with vagina bulbosa; Lang���s vesicle present. Etymology The name Laqueusplana refers to the term ��� laqueus ���, Latin for loop. This is in reference to the loop that the stylet makes between the prostatic vesicle and the pharynx in this genus. Other species of the genus Pleioplana megala (Marcus, 1952) also has a forward directed male copulatory system and shows a loop between the prostatic vesicle and the pharynx. Therefore, it must be transferred to the new genus Laqueusplana gen. nov., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on page 7, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Marcus E. 1952. Turbellaria Brasileiros (10). Boletim da Faculdade de Filosofia, Ciencias e Letras Universidade de Sao Paulo 10: 85 - 86."]}

Laqueusplana bocki gen. et sp. nov. urn:lsid:zoobank.org:act: 0467FB7F-9254-49E8-AE5F-D02BC2CE89B6 Figs 1���3, 6A Notoplana atomata O.F. M��ller, 1776 in Bock 1913 (partim): 202, table X, fig. 3 (individuals with a spiral-shaped stylet). Etymology The name of the species is dedicated to Sixten Bock, famous Swedish invertebrate zoologist (1884��� 1946). Material examined Holotype SPAIN: sagittally sectioned, stained with Azan, Jan. 2012 (MNCN 4.01 / 1118 a 1150, 34 slides). Paratype SPAIN: 1 sagittally sectioned specimen, stained with Azan, among mussels at a depth of nearly 6 meters, Dec. 2013, 42��33.7760��� N, 08��59.3090��� W (MNCN 4.01/ 1151 a 1189, 40 slides). Type locality SPAIN: Galicia, Club N��utico de Riveira, among mussels on a pontoon between half to one meter depth, 42��33.7670��� N, 08��59.2860��� W. Description Living worms 25 mm long and 7 mm wide. Body shape elongated, of fleshy consistency, broader anteriorly, then stretching to form a slightly pointed posterior end; few smooth marginal undulations (Fig. 1 A���C). Dorsal surface with pale beige ground colour and evenly distributed dark brown spots, except in pharyngeal and genital regions; body margin transparent and spot-free (Fig. 1A). Tentacles absent; instead tentacular eyes present in two rounded clusters. Cerebral eyes form two elongated groups (between 15 and 17 eyes) next to tentacular eyes; marginal or frontal eyes lacking (Fig. 1A). Ventral surface pale brown, almost transparent. Bilobated brain with two symmetrical lobes located ventral to eyes. Pharynx occupies middle third of body, with oral pore opening ventrally in its medial region. Male and female genital pores well separated, opening at beginning of last third of body. Ovaries well developed, lying dorsally between intestinal branches. Testes ventral. MALE REPRODUCTIVE SYSTEM. Male copulatory organ consists of an interpolated prostatic vesicle, a true seminal vesicle and a penis papilla with a long, slender stylet, and is located almost immediately behind pharyngeal cavity (Fig. 2C). Testes located ventrally, sometimes observed between intestinal branches. Vasa deferentia run ventrally along both sides of posterior body region, swelling in spermiducal vesicles before entering seminal vesicle proximally. Seminal and prostatic vesicles forward directed (Fig. 2A). Seminal vesicle with thick muscular walls, connected to prostatic vesicle by short and narrow ejaculatory duct (Fig. 2D). Ejaculatory duct projects proximally into prostatic vesicle, crosses it and opens near distal end. Prostatic vesicle oval-shaped, enlarged and covered with strong muscular layers. Prostatic vesicle internally subdivided into at least eight parallel tubular chambers extending from proximal end, giving characteristic citrus-like appearance (Figs 2D, 3A). Extravesicular glands can be found lining proximal end of prostatic vesicle (Fig. 2A). Long coiled stylet emerges from distal end of prostatic vesicle, forms characteristic spiral-like loop between prostatic vesicle and pharynx, turns backwards and opens dorso-ventrally into male atrium (Figs 2 A���D, 3). Small conical-shaped penis papilla housed within ciliated atrium (Fig. 2B). FEMALE REPRODUCTIVE SYSTEM. Female system consists of external and internal vaginas, oviducts, uteri and Lang���s vesicle (Fig. 2C). Muscular external vagina, or vagina bulbosa, lined with cuboidal epithelium with fringe-like extensions. Vagina bulbosa narrows distally, then extends dorsally or anteriorly towards male copulatory system before reaching internal vagina. Internal vagina turns posteriorly and runs dorsally to posterior end. Oviducts lead separately into common receptacle at proximal end of internal vagina. Numerous shell and cement glands open in region surrounding both vaginas. After receiving oviducts, vagina continues into enlarged Lang���s vesicle that extends posteriorly, sometimes reaching posterior end of animal (Fig. 2E). Differentional diagnosis Due to the presence of a prostatic vesicle filled with tubular chambers (atomata - type), separated gonopores and a vagina bulbosa, the genus Laqueusplana gen. nov. belongs to the family Pleioplanidae. However, the presence of a long stylet with a spiral loop and a of forward directed male copulatory system justifies the erection of a new genus within this family. Species of the genera Izmira Bulnes, 2010, Melloplana Faubel, 1983 and Persica Maghsoudlou et al., 2015 share some characteristics of the Pleioplanidae family, mainly the presence of an atomata - type prostatic vesicle. However, these genera can be differentiated from the genus Laqueusplana gen. nov. et by the following: Izmira lacks cerebral eyes and Lang���s vesicle and has a backwards directed male copulatory system and a penis rod; Melloplana is characterized by the presence of an unarmed, muscular penis papilla and Persica presents distinct characteristics such as the presence of nuchal tentacles, a male copulatory organ wrapped in a muscular bulb and an elongated stylet. Laqueusplana gen. nov. and Pleioplana Faubel, 1983 are morphologically most closely related to each other, which is reflected in a number of shared characteristics. Externally, both have an elongated body with pale ground colour, two clusters of both tentacular and cerebral eyes and lack tentacles. They also possess a ruffled pharynx that occupies the middle third of the body and a copulatory system that begins posterior to the pharynx. Laqueusplana gen. nov., unlike Pleioplana, has the seminal and prostatic vesicles directed forward and a longer, coiled stylet situated between the pharynx and prostatic vesicle. The female copulatory system of the genus Laqueusplana gen. nov. consists of a well-developed vagina bulbosa and an enlarged Lang���s vesicle, which sometimes reaches the posterior end of the animal. In general, the female system in this genus is larger than those of other Pleioplanidae genera. Pleioplana and Melloplana show a similar female system as Laqueusplana gen. nov., although smaller in size, while Izmira and Persica present a shorter female track and a complete absence of Lang���s vesicle. Biology Live specimens have rapid scrolling movements and, when stressed, are able to swim by rotating the body, orienting the ventral body surface towards the water surface, and shaking the body while waving its edges. Remarks During the study and analysis of Laqueusplana bocki gen. et sp. nov. and similar species we discovered that in the description of Notoplana atomata of Bock (1913: 202), this author mentioned that some individuals in his material showed a long stylet forming a loop. However, in his reconstruction of Notoplana atomata (Bock 1913: 201, fig. 39) this author did not draw a stylet with a loop or a prostatic vesicle directed forward, but he photographed a specimen (Bock 1913: table XX, fig. 3) with these characteristics. This fact means that Bock took note of the outstanding features of the new genus Laqueusplana gen. nov., but probably due to the scarcity of material did not give it any importance and considered the differences as exceptions or artefacts of fixation that did not allow the establishment of new species. Nevertheless, it is clear that of Laqueusplana gen. nov. was present in the study of Bock but it wasn���t described; therefore, we dedicate the new species to this great specialist of Polycladida. Distribution Laqueusplana bocki gen. et sp. nov. has only been found along the north-western Atlantic coast of Galicia, Spain. Notably, within the family Pleioplanidae (4 genera and 13 species), Pleioplana atomata (O.F. M��ller, 1776) and Laqueusplana bocki gen. et sp. nov. are the only representatives of the family found along European Atlantic coasts. Nonetheless, further research must be done to determine the entire distribution range of the new species., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 7-12, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Muller O. F. 1776. Zoologiae danicae prodromus, seu Animalium Daniae et Norvegiae indigenarum characteres, nomina, et synonyma imprimis popularium. Hallageriis, Havniae [Copenhagen].","Bock S. 1913. Studien ueber Polycladen. Zoologiska bidrag fran Uppsala 2: 31 - 344.","Marcus E. 1952. Turbellaria Brasileiros (10). Boletim da Faculdade de Filosofia, Ciencias e Letras Universidade de Sao Paulo 10: 85 - 86.","Bulnes V. N. 2010. Five new Polycladida (Platyhelminthes: Acotylea) species from the Aegean Sea with remarks on the prostatic structures. Journal of Natural History 44 (9): 515 - 544. http: // dx. doi. org / 10.1080 / 00222930903497535","Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121.","Maghsoudlou A., Bulnes V. N. & Rahimian H. 2015. Persica qeshmensis gen. et sp. nov. from the Persian Gulf (Platyhelminthes: Polycladida: Acotylea), with remarks on reproductive structures. Journal of Natural History 49 (25 - 26): 1477 - 1491. http: // dx. doi. org / 10.1080 / 00222933.2015.1006278"]}

Laqueusplana bocki gen. et sp. nov. urn:lsid:zoobank.org:act: 0467FB7F-9254-49E8-AE5F-D02BC2CE89B6 Figs 1–3, 6A Notoplana atomata O.F. Müller, 1776 in Bock 1913 (partim): 202, table X, fig. 3 (individuals with a spiral-shaped stylet). Etymology The name of the species is dedicated to Sixten Bock, famous Swedish invertebrate zoologist (1884– 1946). Material examined Holotype SPAIN: sagittally sectioned, stained with Azan, Jan. 2012 (MNCN 4.01 / 1118 a 1150, 34 slides). Paratype SPAIN: 1 sagittally sectioned specimen, stained with Azan, among mussels at a depth of nearly 6 meters, Dec. 2013, 42º33.7760′ N, 08º59.3090′ W (MNCN 4.01/ 1151 a 1189, 40 slides). Type locality SPAIN: Galicia, Club Náutico de Riveira, among mussels on a pontoon between half to one meter depth, 42º33.7670′ N, 08º59.2860′ W. Description Living worms 25 mm long and 7 mm wide. Body shape elongated, of fleshy consistency, broader anteriorly, then stretching to form a slightly pointed posterior end; few smooth marginal undulations (Fig. 1 A–C). Dorsal surface with pale beige ground colour and evenly distributed dark brown spots, except in pharyngeal and genital regions; body margin transparent and spot-free (Fig. 1A). Tentacles absent; instead tentacular eyes present in two rounded clusters. Cerebral eyes form two elongated groups (between 15 and 17 eyes) next to tentacular eyes; marginal or frontal eyes lacking (Fig. 1A). Ventral surface pale brown, almost transparent. Bilobated brain with two symmetrical lobes located ventral to eyes. Pharynx occupies middle third of body, with oral pore opening ventrally in its medial region. Male and female genital pores well separated, opening at beginning of last third of body. Ovaries well developed, lying dorsally between intestinal branches. Testes ventral. MALE REPRODUCTIVE SYSTEM. Male copulatory organ consists of an interpolated prostatic vesicle, a true seminal vesicle and a penis papilla with a long, slender stylet, and is located almost immediately behind pharyngeal cavity (Fig. 2C). Testes located ventrally, sometimes observed between intestinal branches. Vasa deferentia run ventrally along both sides of posterior body region, swelling in spermiducal vesicles before entering seminal vesicle proximally. Seminal and prostatic vesicles forward directed (Fig. 2A). Seminal vesicle with thick muscular walls, connected to prostatic vesicle by short and narrow ejaculatory duct (Fig. 2D). Ejaculatory duct projects proximally into prostatic vesicle, crosses it and opens near distal end. Prostatic vesicle oval-shaped, enlarged and covered with strong muscular layers. Prostatic vesicle internally subdivided into at least eight parallel tubular chambers extending from proximal end, giving characteristic citrus-like appearance (Figs 2D, 3A). Extravesicular glands can be found lining proximal end of prostatic vesicle (Fig. 2A). Long coiled stylet emerges from distal end of prostatic vesicle, forms characteristic spiral-like loop between prostatic vesicle and pharynx, turns backwards and opens dorso-ventrally into male atrium (Figs 2 A–D, 3). Small conical-shaped penis papilla housed within ciliated atrium (Fig. 2B). FEMALE REPRODUCTIVE SYSTEM. Female system consists of external and internal vaginas, oviducts, uteri and Lang’s vesicle (Fig. 2C). Muscular external vagina, or vagina bulbosa, lined with cuboidal epithelium with fringe-like extensions. Vagina bulbosa narrows distally, then extends dorsally or anteriorly towards male copulatory system before reaching internal vagina. Internal vagina turns posteriorly and runs dorsally to posterior end. Oviducts lead separately into common receptacle at proximal end of internal vagina. Numerous shell and cement glands open in region surrounding both vaginas. After receiving oviducts, vagina continues into enlarged Lang’s vesicle that extends posteriorly, sometimes reaching posterior end of animal (Fig. 2E). Differentional diagnosis Due to the presence of a prostatic vesicle filled with tubular chambers (atomata - type), separated gonopores and a vagina bulbosa, the genus Laqueusplana gen. nov. belongs to the family Pleioplanidae. However, the presence of a long stylet with a spiral loop and a of forward directed male copulatory system justifies the erection of a new genus within this family. Species of the genera Izmira Bulnes, 2010, Melloplana Faubel, 1983 and Persica Maghsoudlou et al., 2015 share some characteristics of the Pleioplanidae family, mainly the presence of an atomata - type prostatic vesicle. However, these genera can be differentiated from the genus Laqueusplana gen. nov. et by the following: Izmira lacks cerebral eyes and Lang’s vesicle and has a backwards directed male copulatory system and a penis rod; Melloplana is characterized by the presence of an unarmed, muscular penis papilla and Persica presents distinct characteristics such as the presence of nuchal tentacles, a male copulatory organ wrapped in a muscular bulb and an elongated stylet. Laqueusplana gen. nov. and Pleioplana Faubel, 1983 are morphologically most closely related to each other, which is reflected in a number of shared characteristics. Externally, both have an elongated body with pale ground colour, two clusters of both tentacular and cerebral eyes and lack tentacles. They also possess a ruffled pharynx that occupies the middle third of the body and a copulatory system that begins posterior to the pharynx. Laqueusplana gen. nov., unlike Pleioplana, has the seminal and prostatic vesicles directed forward and a longer, coiled stylet situated between the pharynx and prostatic vesicle. The female copulatory system of the genus Laqueusplana gen. nov. consists of a well-developed vagina bulbosa and an enlarged Lang’s vesicle, which sometimes reaches the posterior end of the animal. In general, the female system in this genus is larger than those of other Pleioplanidae genera. Pleioplana and Melloplana show a similar female system as Laqueusplana gen. nov., although smaller in size, while Izmira and Persica present a shorter female track and a complete absence of Lang’s vesicle. Biology Live specimens have rapid scrolling movements and, when stressed, are able to swim by rotating the body, orienting the ventral body surface towards the water surface, and shaking the body while waving its edges. Remarks During the study and analysis of Laqueusplana bocki gen. et sp. nov. and similar species we discovered that in the description of Notoplana atomata of Bock (1913: 202), this author mentioned that some individuals in his material showed a long stylet forming a loop. However, in his reconstruction of Notoplana atomata (Bock 1913: 201, fig. 39) this author did not draw a stylet with a loop or a prostatic vesicle directed forward, but he photographed a specimen (Bock 1913: table XX, fig. 3) with these characteristics. This fact means that Bock took note of the outstanding features of the new genus Laqueusplana gen. nov., but probably due to the scarcity of material did not give it any importance and considered the differences as exceptions or artefacts of fixation that did not allow the establishment of new species. Nevertheless, it is clear that of Laqueusplana gen. nov. was present in the study of Bock but it wasn’t described; therefore, we dedicate the new species to this great specialist of Polycladida. Distribution Laqueusplana bocki gen. et sp. nov. has only been found along the north-western Atlantic coast of Galicia, Spain. Notably, within the family Pleioplanidae (4 genera and 13 species), Pleioplana atomata (O.F. Müller, 1776) and Laqueusplana bocki gen. et sp. nov. are the only representatives of the family found along European Atlantic coasts. Nonetheless, further research must be done to determine the entire distribution range of the new species.

Persica Maghsoudlou, Bulnes & Rahimian, 2015 Fig. 5I Persica Maghsoudlou, Bulnes & Rahimian, 2015: 5. Type and only species Persica qeshmensis Maghsoudlou, Bulnes & Rahimian, 2015. Diagnosis Pleioplanidae with tentacular and cerebral eye clusters; with small nuchal tentacles. Male copulatory apparatus directed backwards. Seminal vesicle and/or spermiducal bulbs present. Penis duct continuous with a long penis stylet. Female apparatus usually with vagina bulbosa; Lang���s vesicle absent., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on page 22, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Maghsoudlou A., Bulnes V. N. & Rahimian H. 2015. Persica qeshmensis gen. et sp. nov. from the Persian Gulf (Platyhelminthes: Polycladida: Acotylea), with remarks on reproductive structures. Journal of Natural History 49 (25 - 26): 1477 - 1491. http: // dx. doi. org / 10.1080 / 00222933.2015.1006278"]}

Izmira Bulnes, 2010 Fig. 5 G���H Izmira Bulnes, 2010: 13���14. Type species Izmira cinari Bulnes, 2010. Diagnosis (after Bulnes 2010) Pleioplanidae, oval to elongated, without tentacles. Tentacular eyes present; cerebral, frontal and marginal eyes absent. Male apparatus oriented backwards with a true seminal vesicle, interpolated true citrus-type prostatic vesicle, without stylet and with a penis rod. Female apparatus with vagina bulbosa; Lang���s vesicle absent. Valid species: Izmira cinari Bulnes, 2010. Izmira turkeyi Bulnes, 2010., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 20-21, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Bulnes V. N. 2010. Five new Polycladida (Platyhelminthes: Acotylea) species from the Aegean Sea with remarks on the prostatic structures. Journal of Natural History 44 (9): 515 - 544. http: // dx. doi. org / 10.1080 / 00222930903497535"]}

Laqueusplana megala (Marcus, 1952) comb. nov. Figs 1, 4, 6B Notoplana megala Marcus, 1952: 85, figs 154���158. Pleioplana megala ��� Faubel 1983: 117. Examined material One mature, sagittally sectioned specimen from the invertebrate collection of the Swedish Museum of Natural History in Stockholm (Sweden), Cat Nr: SMNH 109094 to 109096 (3 slides). Type locality BRAZIL: Island of S��o Sebasti��o. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Without mottled background. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present (Fig. 1D). Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters (Fig. 1E). Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM (Fig. 4 A���E). Single male pore. Male copulatory apparatus not enclosed within muscular bulb, oriented forward and located in last body third. Ejaculatory duct with spiralshaped stylet (forming a loop between prostatic vesicle and pharynx). Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM (Fig. 4 A���D). Vagina elongated, tube-like, looping towards male complex. Bulbous Lang���s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Specimens found on algae from the upper littoral zone. Distribution Ilha de S��o Sebasti��o, Ubatuba (S��o Paulo State), Brazil., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 12-14, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Marcus E. 1952. Turbellaria Brasileiros (10). Boletim da Faculdade de Filosofia, Ciencias e Letras Universidade de Sao Paulo 10: 85 - 86.","Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121."]}

Key to the valid pleioplanid species 1. Ejaculatory duct with a straight stylet and directed backwards ������������������������������������������.2 ��� Ejaculatory duct unarmed, without stylet and directed backwards ���������������������������������������8 ��� Ejaculatory duct with a spiral-shaped stylet (forming a loop between the prostatic vesicle and the pharynx) and directed forward ������������������������������������������������������������������������������11 2. Dorsal appearance translucent ���������������������������������������������������������������������������������3 ��� Dorsal appearance opaque ������������������������������������������������������������������������������������5 3. Spermiducal bulbs absent; body shape oval ������������������������ Pleioplana okusi Bulnes et al., 2009 ��� Spermiducal bulbs present; body shape elongated ���������������������������������������������������������4 4. Nuchal tentacles absent; tentacular knobs present; tentacular eyes in rounded and compact clusters in place of the tentacles; male copulatory apparatus not enclosed in a muscular bulb; Lang���s vesicle present ������������������������������������������������������ Pleioplana delicata (Yeri & Kaburaki, 1918) ��� Nuchal tentacles present; tentacular knobs absent; tentacular eyes at the base of or within the tentacles; male copulatory apparatus enclosed in a muscular bulb; Lang���s vesicle absent ��������������������������������������������������������������� Persica qeshmensis Maghsoudlou et al., 2015 5. Body shape elongated ������������������������������������������������������������������������������������������6 ��� Body shape oval ������������������������������������������������������������������������������������������������7 6. Pharynx located at the end of the first body third; spermiducal bulbs present; oral pore in the second body third and in the posterior region of the pharynx; male and female gonopores clearly separated ������������������������������������������������������������������������ Pleioplana atomata O.F. M��ller, 1776 ��� Pharynx in the second or last body third; spermiducal bulbs absent; oral pore in the second body third and in the middle of the pharynx; male and female gonopores located in a common pore ��������������������������������������������������������������������������� Pleioplana californica (Plehn, 1898) 7. Spermiducal bulbs absent; connection between ejaculatory duct and prostatic vesicle without projection ������������������������������������������������������������ Pleioplana mortenseni (Bock, 1913) ��� Spermiducal bulbs present; connection between ejaculatory duct and prostatic vesicle with projection ������������������������������������ Pleioplana bosphorensis Bulnes, Kalkan & Karhan, 2009 8. Cerebral eyes absent; spermiducal bulbs present; vagina slanted towards the posterior end of the body���������������������������������������������������������������������������������������������������������9 ��� Cerebral eyes in two clusters; spermiducal bulbs absent; vagina looping towards the male complex ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� 1 0 9. Dorsal longitudinal median line not outstanding; oral pore in the second body third and in the middle of the pharynx ��������������������������������� Izmira turkeyi Bulnes, Kalkan & Karhan, 2010 ��� Dorsal longitudinal median line highlighted by a concentration of spots; oral pore in the second body third and in the posterior region of the pharynx ��������������� Izmira cinari Bulnes, 2010 10. Male and female gonopores located very close to each other (in the same body third); connection between ejaculatory duct and prostatic vesicle with projection ��������������������� ��������������������������������������������������������������������������� Melloplana japonica (Kato, 1937) ��� Male and female gonopores clearly separated (in different body thirds); connection between ejaculatory duct and prostatic vesicle without projection ������������������������������������������������ ��������������������������������������������������������������������� Melloplana ferruginea (Schmarda, 1859) 11. Pharynx at the end of the first body third ��������������������� Laqueusplana bocki gen. et sp. nov. ��� Pharynx in the second or last body third ��������� Laqueusplana megala (Marcus, 1952) comb. nov., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 5-6, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Bulnes V. N., Kalkan E. & Karhan S. U. 2009. Two new Pleioplana species (Platyhelminthes, Polycladida, Acotylea) from Turkey. Journal of Natural History 43 (37 - 38): 2273 - 2281. http: // dx. doi. org / 10.1080 / 00222930903094662","Yeri M. & Kaburaki T. 1918. Description of some Japanese Polyclad Turbellaria. Journal of the College of Science, Tokyo Imperial University 39 (9): 1 - 54.","Maghsoudlou A., Bulnes V. N. & Rahimian H. 2015. Persica qeshmensis gen. et sp. nov. from the Persian Gulf (Platyhelminthes: Polycladida: Acotylea), with remarks on reproductive structures. Journal of Natural History 49 (25 - 26): 1477 - 1491. http: // dx. doi. org / 10.1080 / 00222933.2015.1006278","Muller O. F. 1776. Zoologiae danicae prodromus, seu Animalium Daniae et Norvegiae indigenarum characteres, nomina, et synonyma imprimis popularium. Hallageriis, Havniae [Copenhagen].","Bock S. 1913. Studien ueber Polycladen. Zoologiska bidrag fran Uppsala 2: 31 - 344.","Bulnes V. N. 2010. Five new Polycladida (Platyhelminthes: Acotylea) species from the Aegean Sea with remarks on the prostatic structures. Journal of Natural History 44 (9): 515 - 544. http: // dx. doi. org / 10.1080 / 00222930903497535","Kato K. 1937. Polyclads collected in Idu, Japan. Japanese Journal of Zoology 7: 2 ll- 232.","Schmarda L. K. 1859. Neue wirbellose Thiere beobachtet und gesammelt auf einer Reise um die Erde 1853 bis 1857. Bd I: Turbellarien, Rotatorien und Anneliden. W. Engelmann, Leipzig. http: // dx. doi. org / 10.5962 / bhl. title. 85313","Marcus E. 1952. Turbellaria Brasileiros (10). Boletim da Faculdade de Filosofia, Ciencias e Letras Universidade de Sao Paulo 10: 85 - 86."]}

Pleioplana okusi Bulnes, Kalkan & Karhan, 2009 Fig. 5F Pleioplana okusi Bulnes, Kalkan & Karhan, 2009: 8–9, fig. 3. Type locality TURKEY: Altinkum, Bosphorus Strait (Bosporus). Description Body shape oval. Cryptic colour. Translucent dorsal appearance. Longitudinal median line not outstanding. Heterogeneous mottled background with spots and dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in last body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs absent. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Bulbous Lang’s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found on a hard bottomed mussel bed of Mytilus galloprovincialis. Distribution Bosporus Strait, Turkey.

Izmira cinari Bulnes, 2010 Fig. 5G Izmira cinari Bulnes, 2010: 14, 16, figs 5���6. Type locality TURKEY: Izmir Bay, Aegean Sea. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Longitudinal median line highlighted by concentration of spots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes absent. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores located very close to each other (in same body third). MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in second body third. Ejaculatory duct unarmed, without stylet, but with penis rod. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like and oriented backwards. Lang���s vesicle absent. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found in sublittoral mussel beds of Mytilus galloprovincialis. Distribution Bosporus, Aegean Sea, Turkey., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on page 21, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Bulnes V. N. 2010. Five new Polycladida (Platyhelminthes: Acotylea) species from the Aegean Sea with remarks on the prostatic structures. Journal of Natural History 44 (9): 515 - 544. http: // dx. doi. org / 10.1080 / 00222930903497535"]}

Melloplana Faubel, 1983 Fig. 6 C���D Melloplana Faubel, 1983: 117, fig. 37b. Type species Melloplana ferruginea (Schmarda, 1859). Diagnosis (after Faubel 1983) Pleioplanidae with tentacular and cerebral eye-spots; tentacles lacking. Male copulatory apparatus oriented backwards with seminal vesicle, without stylet and with penis papilla. Female apparatus usually with vagina bulbosa. Lang���s vesicle present. Valid species: Melloplana ferruginea (Schmarda, 1859). Melloplana japonica (Kato, 1937)., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on page 23, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121.","Schmarda L. K. 1859. Neue wirbellose Thiere beobachtet und gesammelt auf einer Reise um die Erde 1853 bis 1857. Bd I: Turbellarien, Rotatorien und Anneliden. W. Engelmann, Leipzig. http: // dx. doi. org / 10.5962 / bhl. title. 85313","Kato K. 1937. Polyclads collected in Idu, Japan. Japanese Journal of Zoology 7: 2 ll- 232."]}

Pleioplana californica (Plehn, 1897) Fig. 5D Leptoplana californica Plehn, 1897: 93, table 5, figs 1���2. Stylochoplana plehni Bock, 1913: 80. Leptoplana californica ��� Plehn 1899: 451, fig. B. Pleioplana californica ��� Faubel 1983: 117. Stylochoplana plehni ��� Hyman 1953: 305. Type locality USA: Monterey Bay, Monterey, California. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with spots and dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Male and female gonopores located in a common pore. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in last body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at the proximal end of the prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards the male complex. Enlarged Lang���s vesicle. Paired uterus. One pair of uterine vesicles. Tube-like cement chamber. Endolecithal eggs. Biology Found during low tide between rocks and sand. Distribution California, USA. Note Pleioplana inquieta Heath & McGregor, 1912, considered synonymous with P. californica by Hyman (1953).According to Hyman, P. inquieta not only shows the same morphological features as P.californica, but also shares the same habitat and distribution, namely Monterey Bay, California. Therefore, in this review, P. inquieta is considered a synonym of P. californica., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 18-19, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Plehn M. 1897. Drei neue Polycladen. Jenaische Zeitschrift 31 (N. F. 24): 90 - 99.","Bock S. 1913. Studien ueber Polycladen. Zoologiska bidrag fran Uppsala 2: 31 - 344.","Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121.","Hyman L. H. 1953. The polyclad flatworms of the Pacific coast of North America. Bulletin of the American Museum of Natural History 100: 269 - 391.","Heath H. & McGregor E. A. 1912. New polyclads from Monterey Bay, California. Proceedings of the Academy of Natural Sciences of Philadelphia 64: 455 - 488."]}

Pleioplana Faubel, 1983 Fig. 5 A���F Pleioplana Faubel 1983: 117, fig. 37A. Type species Pleioplana atomata (O.F. M��ller, 1776) (individuals with straight stylets). Diagnosis Pleioplanidae with tentacular and cerebral eye clusters; without tentacles. Male copulatory apparatus directed backwards. Seminal vesicle and/or spermiducal bulbs present. Penis duct continuous with a short (thick or thin) penis stylet. Female apparatus usually with vagina bulbosa; Lang���s vesicle present. Valid species of the genus Pleioplana atomata (O.F. M��ller, 1776). Pleioplana mortenseni (Bock, 1913). Pleioplana delicata (Yeri & Kaburaki, 1918). Pleioplana californica (Plehn, 1898). Pleioplana bosphorensis Bulnes, Kalkan & Karhan, 2009. Pleioplana okusi Bulnes, Kalkan & Karhan, 2009., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on page 14, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121.","Muller O. F. 1776. Zoologiae danicae prodromus, seu Animalium Daniae et Norvegiae indigenarum characteres, nomina, et synonyma imprimis popularium. Hallageriis, Havniae [Copenhagen].","Bock S. 1913. Studien ueber Polycladen. Zoologiska bidrag fran Uppsala 2: 31 - 344.","Yeri M. & Kaburaki T. 1918. Description of some Japanese Polyclad Turbellaria. Journal of the College of Science, Tokyo Imperial University 39 (9): 1 - 54.","Bulnes V. N., Kalkan E. & Karhan S. U. 2009. Two new Pleioplana species (Platyhelminthes, Polycladida, Acotylea) from Turkey. Journal of Natural History 43 (37 - 38): 2273 - 2281. http: // dx. doi. org / 10.1080 / 00222930903094662"]}

Persica qeshmensis Maghsoudlou, Bulnes & Rahimian, 2015 Fig. 5I Persica qeshmensis Maghsoudlou, Bulnes & Rahimian, 2015: 10, 12, figs 2���6, 7a���c. Type locality IRAN: Persian Gulf, Qeshm Island. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with dots. Smooth dorsal surface. Nuchal tentacles present, small. Tentacular knobs absent. Marginal eyes absent. Tentacular eyes at base of or within tentacles. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus enclosed within muscular bulb, oriented backwards and located in second body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Lang���s vesicle absent. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found in the intertidal zone along the Iranian coast of the Persian Gulf. Distribution Iran, Persian Gulf., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 22-23, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Maghsoudlou A., Bulnes V. N. & Rahimian H. 2015. Persica qeshmensis gen. et sp. nov. from the Persian Gulf (Platyhelminthes: Polycladida: Acotylea), with remarks on reproductive structures. Journal of Natural History 49 (25 - 26): 1477 - 1491. http: // dx. doi. org / 10.1080 / 00222933.2015.1006278"]}

Laqueusplana gen. nov. urn:lsid:zoobank.org:act: DFBD1007-F9CA-46D8-8A8A-9827B9045040 Figs 1–4, 6 A–B Type species Laqueusplana bocki gen. et sp. nov. Diagnosis Pleioplanidae with tentacular and cerebral eye clusters; without tentacles. Male copulatory apparatus directed forward. Seminal vesicle and/or spermiducal bulbs present; penis duct forms a loop between prostatic vesicle and pharynx. Penis stylet long and pointed. Female apparatus usually with vagina bulbosa; Lang’s vesicle present. Etymology The name Laqueusplana refers to the term “ laqueus ”, Latin for loop. This is in reference to the loop that the stylet makes between the prostatic vesicle and the pharynx in this genus. Other species of the genus Pleioplana megala (Marcus, 1952) also has a forward directed male copulatory system and shows a loop between the prostatic vesicle and the pharynx. Therefore, it must be transferred to the new genus Laqueusplana gen. nov.

Pleioplana delicata (Yeri & Kaburaki, 1918) Fig. 5C Notoplana delicata Yeri & Kaburaki, 1918: 13���15, figs 11���13, pl. II, fig. 14. Pleioplana delicata ��� Faubel 1983: 117. Type locality JAPAN: Misaki. Description Body shape elongated. Cryptic colour. Translucent dorsal appearance. Longitudinal median line highlighted by concentration of spots. Heterogeneous mottled background with spots and dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within muscular bulb, oriented backwards and located in last body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Enlarged Lang���s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found along the coast during the low tide. Distribution Shirahama (Prov. Awa), Japan., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 17-18, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Yeri M. & Kaburaki T. 1918. Description of some Japanese Polyclad Turbellaria. Journal of the College of Science, Tokyo Imperial University 39 (9): 1 - 54.","Faubel A. 1983. The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17 - 121."]}

Pleioplana bosphorensis Bulnes, Kalkan & Karhan, 2009 Fig. 5E Pleioplana bosphorensis Bulnes, Kalkan & Karhan, 2009: 5���6, figs 1���2. Type locality TURKEY: Altinkum, Bosphorus Strait (Bosphorus). Description Body shape oval. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Homogeneous mottled background with spots and dots. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present. Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters. Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM. Single male pore. Male apparatus not enclosed within a muscular bulb, oriented backwards and located in last body third. Ejaculatory duct with straight stylet. Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. External (or false) seminal vesicle absent. FEMALE REPRODUCTIVE SYSTEM. Vagina elongated, tube-like, looping towards male complex. Bulbous Lang���s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Found on a hard bottomed mussel bed of Mytilus galloprovincialis. Distribution Bosporus Strait, Turkey., Published as part of Rodr��guez, Jorge, Grande, Cristina, Bulnes, NataliaVeronica, Almon, Bruno, Perez, Jacinto & Nore��a, Carolina, 2017, Systematic revision of the family Pleioplanidae Faubel, 1983 (Polycladida, Acotylea): new genus and combinations, pp. 1-30 in European Journal of Taxonomy 264 on pages 19-20, DOI: 10.5852/ejt.2017.264, http://zenodo.org/record/3823145, {"references":["Bulnes V. N., Kalkan E. & Karhan S. U. 2009. Two new Pleioplana species (Platyhelminthes, Polycladida, Acotylea) from Turkey. Journal of Natural History 43 (37 - 38): 2273 - 2281. http: // dx. doi. org / 10.1080 / 00222930903094662"]}

Laqueusplana megala (Marcus, 1952) comb. nov. Figs 1, 4, 6B Notoplana megala Marcus, 1952: 85, figs 154–158. Pleioplana megala – Faubel 1983: 117. Examined material One mature, sagittally sectioned specimen from the invertebrate collection of the Swedish Museum of Natural History in Stockholm (Sweden), Cat Nr: SMNH 109094 to 109096 (3 slides). Type locality BRAZIL: Island of São Sebastião. Description Body shape elongated. Cryptic colour. Opaque dorsal appearance. Longitudinal median line not outstanding. Without mottled background. Smooth dorsal surface. Nuchal tentacles absent. Tentacular knobs present (Fig. 1D). Marginal eyes absent. Tentacles absent; instead tentacular eyes present in rounded and compact clusters. Dorsal and ventral frontal eyes absent. Cerebral eyes in two clusters (Fig. 1E). Pharynx located in second or last body third, strongly ruffled and ventrally oriented. Oral pore position in second body third and in posterior region of pharynx. Intestine with numerous branches without anastomosis. Intestinal vesicles absent. Gonopores clearly separated. MALE REPRODUCTIVE SYSTEM (Fig. 4 A–E). Single male pore. Male copulatory apparatus not enclosed within muscular bulb, oriented forward and located in last body third. Ejaculatory duct with spiralshaped stylet (forming a loop between prostatic vesicle and pharynx). Prostatic vesicle interpolated. Connection between ejaculatory duct and prostatic vesicle with projection. Internal glandular lining of prostatic vesicle with tubular chambers. Extravesicular prostatic secretion. Prostatic glands located at proximal end of prostatic vesicle. Seminal vesicle simple or spindle-like. Spermiducal bulbs present. FEMALE REPRODUCTIVE SYSTEM (Fig. 4 A–D). Vagina elongated, tube-like, looping towards male complex. Bulbous Lang’s vesicle. Paired uterus. Uterine vesicles absent. Tube-like cement chamber. Endolecithal eggs. Biology Specimens found on algae from the upper littoral zone. Distribution Ilha de São Sebastião, Ubatuba (São Paulo State), Brazil.

Hoploplana Laidlaw, 1902 Hoploplana elisabelloi n. sp. Figure 2 Material examined. Three specimens were captured in R��a de Arousa, Galicia, Spain. One from the Isle of R��a (08/ 10 / 2011), 42 �� 32.985 'N; 8 �� 56.470 'W, another on an algae stalk from ���O Camouco��� (25 /08/ 2013), 42 �� 33.321 'N; 08�� 58.019 'W, and the last one between mussels from a dock of the Yacht Club of Ribeira (21 / 12 / 2012), 42 �� 33.776 'N / 08�� 59.339 'W. Holotype. One sagittally sectioned specimen stained with Azan and deposited in the Invertebrate Collections of the MNCN; Cat. No. MNCN 4.01 / 1096 to 1117 (22 slides). Type locality. Isle of R��a, R��a de Arousa, Galicia, Spain. Depth: 12 metres usually over bryozoans (specifically Membranipora membranacea). Etymology. The specific name is dedicated to the late Galician biologist Elisa Bello; an outstanding person and best friend of the first author, who left us prematurely. Description. Oval-rounded worms, holotype 15 mm long and 12 mm wide. The another two specimens from the same size. Colouration, translucent in appearance, is beige with reddish brown spots and covered with a delicate, bright white network pattern (Fig. 2 A, B, C); body margin transparent with white rods (rhabdites). Ventral surface pale yellow. With well developed conical nuchal tentacles. Tentacular eyes at the base and inside the tentacles (Fig. 2 D), with a few inconspicuous cerebral eyes located slightly ventral and anterior to the brain. Brain just below the tentacles, well developed and almost ventrally positioned (Fig. 2 E). Marginal and frontal eyes absent. Oral pore ventral, in the middle of the body; ruffled pharynx in the second body third and provided with deep folds. Male and female genital pores clearly separate but close to each other, opening at the anterior end of the last third of the body. Ovaries well developed, arranged between the intestinal branches. Testes not observed. Reproductive system (Fig. 2 F, G, J). Reproductive organs located in the last body third. Male copulatory organ consists of a true muscular prostatic vesicle lined with a well-developed glandular epithelium and stylet. Extravesicular glands and a true seminal vesicle are lacking. Vasa deferentia swollen in spermiducal bulbs that enter fronto-laterally into a paired muscular expansion that can be considered external seminal vesicles. Each seminal expansion leads to a long, winding ejaculatory duct. The two ejaculatory, or sperm, ducts join and enter the prostatic vesicle through a common duct. Prostatic vesicle small, lined with high glandular epithelium, and surrounded by a well-developed muscle layer. The stylet is short and curved (6 ��m in the holotype), housed in a large male atrium (18.5 ��m long) lined with a ciliated glandular epithelium. Just posterior to the male pore, the atrium forms a ventro-caudal diverticulum (4.5 ��m long). The small female system is composed of a wide atrium and an ascending female canal that shows a close backwards-directed curve before it joins the shell chamber. Abundant shell and yolk glands were observed in the studied exemplars. The female canal ends with the opening of the oviducts. Biology. Hoploplana elisabelloi was found mainly on bryozoans (specifically Membranipora membranacea) at depths between 1 and 12 metres. The network of trabeculae on the dorsal surface of H. elisabelloi allows it to mimic with the environment. Of the known Hoploplana species, some species (e.g. H. schizoporellae Kato, 1944; H. villosa (Lang, 1884) and H.divae (Bahia et al. 2012)), similar to H. elisabelloi sp.n., are known to associate with the Bryozoa. Nonetheless, there is not enough evidence to affirm if bryozoans are shelters or prey for H. elisabelloi sp.n. One exemplar was photographed during ovo-deposition during which egg plates were observed (Fig. 2 A). Spawning masses are characterised by flat ribbons of a gelatinous consistency. These ribbons consist of white eggs arranged in a tight spiral that bind to the substrate, forming a rounded crust. Discussion. The new species belongs to the genus Hoploplana based on the presence of conical nuchal tentacles, a small glandular prostatic vesicle, the lack of a true seminal vesicle and a hook-shaped stylet inserted at the base of the prostatic vesicle. Of the 14 species comprising the genus Hoploplana (Table 1), eight (H. cupida Kato, 1938, H. deanna Kato, 1939, H. inquilina (Wheeler, 1894) H. insignis (Lang, 1884), H. luracola Smith, 1961, H. ornata Yeri & Kaburaki, 1918 and H. rosea Prudhoe, 1977, H. usaguia Smith, 1960) have a smooth body surface that lacks papillae, similar to H. elisabelloi; all other species have papillose surfaces. Of the species with a smooth surface, only H. deanna presents a hooked stylet, but differs from H. elisabelloi by the presence of a long common sperm duct, very short by H. elisabelloi, and the presence of the reticulate white surface characteristic of this species. The stylet is slightly curved in H. cupida, H. insignis and H. usaguia and sinuate in H. inquilina. The other species of the genus show a straight stylet (see Table I for comparison). As in H. elisabelloi, a short common sperm duct is observed in H. inquilina and H. rosea. Although different in stylet shape, H. elisabelloi (short and curved stylet), H. inquilina (sinuate) and H. rosea (straight) all have a short common sperm duct. In addition, H. inquilina and H. rosea have a shallow ciliated atrium masculinum. However, H. elisabelloi is characterised by a deep, strongly ciliated atrium masculinum (Fig. 2 H, I). Distribution (Fig. 1, orange dots). The genus Hoploplana is known mainly from the Pacific Ocean (7 species, see Table I), the coasts of the western Atlantic Ocean (e.g. Brazil, Panama and Florida) and the Mediterranean Sea (e.g. Italy and Egypt). Until now, this genus appeared to be restricted to the warmer waters of tropical or temperate regions. Regardless, this newly described species is the northern-most record to date. Species Body Stylet Sperm Duct Male atrium Distribution Surface (SD) Hoploplana californica papillate straight long common cilia not longer than the epithelial cilia California (USA) Hyman, 1953 SD Hoploplana elisabelloi n. sp. smooth hook short with very long cilia North Atlantic (Iberian peninsula) reticulate common SD Hoploplana cupida Kato, smooth slightly long common cilia not longer than the epithelial cilia Japan 1938 curved SD Hoploplana deanna Kato, smooth hook common SD cilia not longer than the epithelial cilia Japan 1939 Hoploplana divae Marcus, papillate sinuate long common cilia not longer than the epithelial cilia Brazil, Cura��ao (also found on Cheilostomata 1950 SD Bryozoan (Bahia et al. 2012) and algae (Marcus & Marcus, 1968) Hoploplana inquilina smooth sinuate short cilia not longer than the epithelial cilia USA Atlantic Coast (commensal of snails or Wheeler, 1894) reticulate common SD gastropods) Hoploplana insignis (Lang, smooth slightly long common cilia not longer than the epithelial cilia Mediterranean Sea 1884) (dots) curved SD Hoploplana luracola Smith, smooth straight common SD with very large cilia Panama, Atlantic Coast (commensal of Nerita 1961 (Ritena) gastropods) Hoploplana ornata Yeri & smooth straight common SD cilia not longer than the epithelial cilia Japan Kaburaki, 1918 Hoploplana papillosa Lang, papillate straight long common cilia not longer than the epithelial cilia Capri (Mediterranean Sea) 1884 SD Hoploplana rosea Prudhoe, smooth straight short common inconspicuous Australia 1977 SD Hoploplana rubra Kato, 1944 papillate slightly common SD cilia not longer than the epithelial cilia Japan curved Hoploplana schizoporellae papillate straight common SD cilia not longer than the epithelial cilia Japan (on Schizoporella oenochros ( Bryozoa)) Kato, 1944 Hoploplana usaguia Smith, smooth slightly common SD cilia not longer than the epithelial cilia Brazil (commensal of gastropods) 1960 curved Hoploplana villosa (Lang, papillate slightly long common cilia not longer than the epithelial cilia Japan (on Microporella ciliata (Bryozoa)), Naples 1884) reticulate curved SD (Italia) (on Ciona intestinales (Ascidiacea)), Published as part of Nore��a, Carolina, Rodr��guez, Jorge, P��rez, Jacinto & Almon, Bruno, 2015, New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral, pp. 157-172 in Zootaxa 4039 (1) on pages 158-160, DOI: 10.11646/zootaxa.4039.1.7, http://zenodo.org/record/233785, {"references":["Laidlaw, F. F. (1902) The marine Turbellaria, with an account of the Anatomy of some of the species. In: Gardiner, J. S. (Ed.), The fauna and geography of the Maldive and Laccadive archipelagos. University Press, Cambridge, 1 (3), 282 - 312.","Kato, K. (1944) Polycladida of Japan. Journal of Sigenkagaku Kenkyusyo, 1, 257 - 319.","Lang, A. (1884) Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte (Zoologische Station in Neapel). Verlag von Wilhem Engelmann, Leipzig, 688 pp.","Kato, K. (1938) Polyclads from Seto, Middle Japan. Japanese Journal of Zoology, 7, 577 - 593.","Kato, K. (1939) Report of the biological survey of Mutsu Bay. 34. The polyclads of Mutsu Bay. Science Reports of the Tohoku Imperial University, 14, 141 - 153.","Smith, E. H. (1961) A new commensal polyclad from Panama. The Veliger, 4, 69 - 70.","Smith, E. H. (1960) On a New Polyclad commensal of prosobranches. Anais da Academia Brasileira de Ciencias, 32, 385 - 390."]}

Armatoplana celta sp. n. Figure 3 Material examined. Two specimens from Puerto deportivo de Ribeira, Ría de Arousa, Galicia, Spain (09/01/ 2013). 42 º 33.776 'N; 08º 59.339 'W. Specimens were found among mussels growing on rocks and docks. Holotype. One sagittally sectioned specimen, stained with Azan and deposited in the Invertebrate Collections of the MNCN; Cat. No. MNCN 4.01 / 481 to 4.01 / 497 (17 slides). Type locality. Puerto deportivo de Ribeira. Depth: 2 metres. (42 º 33.776 'N, 08º 59.339 'W). Etymology. The specific name refers to the ancient inhabitants of Galicia, the Celts. Description. Body shape elongated with wavy lateral margins and rounded anterior and posterior ends, of fleshy appearance; 19 mm long and 6 mm wide, live. Pigmentation light brown with dark patches more abundant in the central regions, body margin translucent, beige (Fig. 3 A, B). Ventral surface pale, translucent whitish brown. Without tentacles. Tentacular eyes grouped into two circular patches each with 10–12 eyes. Cerebral eyes, 26–28 in total, in two elongated series extending over the brain (Fig. 3 C, D). Well-developed ruffled pharynx is arranged in the central region of the body, with deep folds (Fig. 3 E). Oral pore at the middle of the pharynx. Male and female genital pores clearly separate. Reproductive system (Fig. 3 E–I): Male copulatory apparatus with spermiducal bulbs, a true prostatic vesicle and an armed penis. The male apparatus is located anterior to the male pore and directed backwards. The vasa deferentia open frontally into the proximal ends of the spermiducal bulbs, which are covered with a well-developed muscular layer. Instead of a true seminal vesicle, spermiducal bulbs are present. The prostatic vesicle is spherical, interpolated and with a smooth, wavy epithelium. The spermiducal bulbs join by the ejaculatory duct, which crosses the prostatic vesicle before opening distally in a long, narrow slightly curved stylet. Prostatic vesicle and penis papilla are enclosed in a muscular bulb. The female system comprises the ovaries, the uteri or oviducts, the vagina interna and externa and a welldeveloped Lang’s vesicle. The oviducts run anteriorly and open separately between the vagina externa and vagina interna. At the entrance of the oviducts, the vagina turns posteriorly and forms the vagina interna, which narrows before leading into a long, well-developed Lang’s vesicle. The vagina externa, or vagina bulbosa, which is lined with a highly glandular muscular epithelium and is directed ventro-posteriorly, expands greatly before narrowing at the ventral genital pore. Biology. Armatoplana celta n. sp. was found among mussels growing on rocks and docks. Discussion. Due to the presence of tentacular and cerebral eyes series, separate gonopores, spermiducal bulbs instead of a seminal vesicle, a male copulatory organ with a long penis stylet, Lang’s vesicle and a vagina bulbosa groups the described species within the genus Armatoplana. Faubel, 1983 The most remarkable characters present by A. celta with respect to the 14 known species of Armatoplana (Table 2) are the presence of spermiducal bulbs and the long, curved stylet. These characters are only shared with A. lactea Laidlaw, 1903, A. panamensis (Plehn, 1896) and Armatoplana leptalea Marcus, 1947, respectively. However, A. celta can be distinguished from both species due to the absence of spermiducal bulbs in A. panamensis and A. leptalea that shows a true seminal vesicle, and the small, curved stylet in A. lactea. Distribution (Fig. 1, grey dots): The genus Armatoplana currently comprises 15 included A. celta species, most known from Central or South America. Four species are known from the shores of Africa while A. reishi (Hyman, 1959) and A. taurica (Jacubowa, 1909) are known from California and the Black Sea, respectively (Table 2). Armatoplana celta is the first record of the genus for the European Atlantic shores and the Iberian Peninsula.

Stylochus neapolitanus (Delle Chiaje, 1841 ���1844) Lang, 1884 Figure 5 Material examined. Two specimens from "Puerto Deportivo de Ribeira" (21 / 12 / 2012). 42 �� 33.776 'N; 008�� 59.339 'W. One specimen from "Couso" (02/05/ 2014). 42 �� 31.248 'N; 09�� 2.570 'W. Both locations in R��a de Arousa, Galicia, Spain. Description. Fixed worms 10���12 mm long and 3���5 mm wide. Body shape elongated with a slightly pointed anterior end and rounded posterior end, with straight margins sometimes with a few undulated waves. Dorsal surface marbled with whitish and dark reddish brown pigmentation, with an orange (or orange and white) pigmented band along the body margins. (Fig. 5 A, B). Ventral surface smooth and whitish (Fig. 5 C). With welldeveloped conical nuchal tentacles, characterised by an orange medial band. Tentacular eyes at the base and inside the tentacles (Fig. 5 D). Cerebral eyes between both tentacles. Marginal eyes at the anterior end. Frontal eyes absent. Brain just anterior to the tentacles, apparent and positioned slightly ventral. Oral pore ventral, near the first third of the body; pharynx with deep folds. Male and female genital pores separate, but close to each other, opening at the last third of the body. Ovaries ventral and well developed. Testes not observed. Reproductive system (Fig. 5 D, E). Located at the posterior end (Fig. 5 D). Male copulatory organ consists of a muscular seminal vesicle, a free pear-shaped prostatic vesicle and a small penis papilla. Vasa deferentia open separately in the latero-proximal region of the elongated seminal vesicle. The ejaculatory duct joins the prostatic vesicle drain duct, and they converge together in the short penis papilla. The free prostatic vesicle is lined with tubular septa, arising from its distal inner wall, that lie parallel to each other. Extravesicular prostatic glands with long necks piercing the proximal region of the prostatic vesicle. Short penis papilla housed in a small male atrium. The female system is simple and composed of an ascending vagina externa, where the shell glands open, and a backwards-directed vagina interna that ends with the opening of the oviducts. Male and female pores are separate from each other, but close together, apparently sometimes be housed in a common cavity. Ovaries ventral. Biology. Stylochus neapolitanus is typically found on the bottom surface of barges, in crevices of compound ascidians or in empty lamellibranch shells (Laidlaw, 1903). In Galicia, S. neapolitanus was mostly found in shallow water, from 1 to 6 metres deep. Worms, when live, reached 15 mm in length. Distribution (Fig. 1, blue dots): Cape Verde Archipelago (Laidlaw, 1903); Naples, Italy (Lang, 1884); Rufisque, Senegal (Palombi, 1939); Catalonia, Spain (Novell, 2003); Mar Menor, Murcia, Spain (Marquina et al, 2014 b). This is the first record of Stylochus neapolitanus for the European Atlantic coast, and likely the first accurate record for the Atlantic Ocean, as the species identification by Palombi (1939) was based on damaged material and thus, is doubtful., Published as part of Nore��a, Carolina, Rodr��guez, Jorge, P��rez, Jacinto & Almon, Bruno, 2015, New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral, pp. 157-172 in Zootaxa 4039 (1) on pages 166-167, DOI: 10.11646/zootaxa.4039.1.7, http://zenodo.org/record/233785, {"references":["Delle Chiaje, S. (1841) Descrizione e notomia degli animali invertebrati della Sicilia citeriore osservati vivi negli anni 1822 - 1830. Stabilimento tipografico di C. Batteli & Comp., Naples, 145 pp. http: // dx. doi. org / 10.5962 / bhl. title. 10031","Lang, A. (1884) Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte (Zoologische Station in Neapel). Verlag von Wilhem Engelmann, Leipzig, 688 pp.","Laidlaw, F. F. (1903) Suggestions for a revision of the classification of the polyclad Turbellaria. Memoirs and proceedings of the Manchester Literary & Philosophical Society, 48 (4), 1 - 16.","Palombi, A. (1939) Turbellaria Policladea. Memoires du Musee royal d'histoire naturelle de Belgique, 15 (2), 95 - 114.","Novell, C. (2003) Tesis Doctorales en Red. Generalitat de Cataluna. Contribucio al coneixement dels turbellaris policladides del litoral catala. Available from: http: // hdl. handle. net / 10803 / 781 (accessed 15 September 2015)"]}

Discocelis tigrina (Blanchard, 1847) Lang 1884 Figure 6 Material examined. All specimens were captured in Galicia, Spain. One specimen from "Os Esqueiros", R��a de Arousa, (10 / 12 / 2011). 42 �� 56.083 'N; 08�� 56.083 'W. Two specimens from "A Ameixida", R��a de Arousa, (20 /03/ 2014 and 28 /01/ 2015). 42 �� 32.058 'N; 08�� 59.309 'W. One specimen from "Beluso", R��a de Pontevedra, (6 / 12 / 2014). 42 �� 20.145 'N; 08�� 47.970 'W. Description. Fixed worms 30 mm long and 15 mm wide. Body shape elongated with rounded anterior and posterior ends. Dorsal surface beige with brown spots of several sizes, light wavy margins sometimes smooth (Fig. 6 A, B). Dorsal surface smooth and whitish (Fig. 6 C). Without tentacles. Marginal, tentacular and cerebral eyes clusters present. Brain between the tentacular and cerebral eyes. Oral pore ventral, anterior body end; pharynx ruffled with deep pharyngeal folds. Male and female systems open through a common genital pore at the last third of the body. Ovaries dorsal and well developed. Reproductive system (Fig. 6 E,F). The male and female copulatory system are arranged near the posterior body margin. They open to a common genital atrium. Male system consists of two voluminous lobes bearing the prostatoid organs. Vasa deferentia, swollen in spermiducal vesicles and open into the ejaculatory duct. The ejaculatory duct runs between the atrial male lobes into the dorsolateral region of the common genital atrium. The slender vagina externa opens into the common atrium genitale. In the studied exemplars the characteristic kidney-shaped Lang���s vesicle was not developed, therefore the form and structure of the same cannot be described. Shell glands cover the distal region of the vagina. Ovaries dorsal. Biology. Discocelis tigrina was found in several locations in Galicia, always under partially buried stones on sandy bottoms. Depth range for captured specimens varied between 5 and 20 m. Living worms were approximately 40 mm long and 25 mm wide when moving. Most specimens were found resting inside a mucous sheath, probably self-secreted. These sheaths were found throughout the year, suggesting that they are not a seasonal phenomenon. Distribution (Fig. 1). Peninsula de R��o de Oro, Western Sahara; and Nouadhibou (formerly Port-��tienne), Mauritania (Palombi, 1939). Gulf of Naples, Italy (Lang, 1884). Within the Iberian Peninsula, Discocelis tigrina was record previously for Catalonia (Novell, 2003) and Asturias, Spain (Marquina et al. 2014 a). This is the first record for the North Atlantic shores., Published as part of Nore��a, Carolina, Rodr��guez, Jorge, P��rez, Jacinto & Almon, Bruno, 2015, New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral, pp. 157-172 in Zootaxa 4039 (1) on pages 167-171, DOI: 10.11646/zootaxa.4039.1.7, http://zenodo.org/record/233785, {"references":["Blanchard, E. (1847) Recherches sur l'organisation des vers. Annales des Sciences Naturelles. Troisieme serie. Zoologie, 8, 271 - 275.","Lang, A. (1884) Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte (Zoologische Station in Neapel). Verlag von Wilhem Engelmann, Leipzig, 688 pp.","Palombi, A. (1939) Turbellaria Policladea. Memoires du Musee royal d'histoire naturelle de Belgique, 15 (2), 95 - 114.","Novell, C. (2003) Tesis Doctorales en Red. Generalitat de Cataluna. Contribucio al coneixement dels turbellaris policladides del litoral catala. Available from: http: // hdl. handle. net / 10803 / 781 (accessed 15 September 2015)"]}

Armatoplana celta sp. n. Figure 3 Material examined. Two specimens from Puerto deportivo de Ribeira, R��a de Arousa, Galicia, Spain (09/01/ 2013). 42 �� 33.776 'N; 08�� 59.339 'W. Specimens were found among mussels growing on rocks and docks. Holotype. One sagittally sectioned specimen, stained with Azan and deposited in the Invertebrate Collections of the MNCN; Cat. No. MNCN 4.01 / 481 to 4.01 / 497 (17 slides). Type locality. Puerto deportivo de Ribeira. Depth: 2 metres. (42 �� 33.776 'N, 08�� 59.339 'W). Etymology. The specific name refers to the ancient inhabitants of Galicia, the Celts. Description. Body shape elongated with wavy lateral margins and rounded anterior and posterior ends, of fleshy appearance; 19 mm long and 6 mm wide, live. Pigmentation light brown with dark patches more abundant in the central regions, body margin translucent, beige (Fig. 3 A, B). Ventral surface pale, translucent whitish brown. Without tentacles. Tentacular eyes grouped into two circular patches each with 10���12 eyes. Cerebral eyes, 26���28 in total, in two elongated series extending over the brain (Fig. 3 C, D). Well-developed ruffled pharynx is arranged in the central region of the body, with deep folds (Fig. 3 E). Oral pore at the middle of the pharynx. Male and female genital pores clearly separate. Reproductive system (Fig. 3 E���I): Male copulatory apparatus with spermiducal bulbs, a true prostatic vesicle and an armed penis. The male apparatus is located anterior to the male pore and directed backwards. The vasa deferentia open frontally into the proximal ends of the spermiducal bulbs, which are covered with a well-developed muscular layer. Instead of a true seminal vesicle, spermiducal bulbs are present. The prostatic vesicle is spherical, interpolated and with a smooth, wavy epithelium. The spermiducal bulbs join by the ejaculatory duct, which crosses the prostatic vesicle before opening distally in a long, narrow slightly curved stylet. Prostatic vesicle and penis papilla are enclosed in a muscular bulb. The female system comprises the ovaries, the uteri or oviducts, the vagina interna and externa and a welldeveloped Lang���s vesicle. The oviducts run anteriorly and open separately between the vagina externa and vagina interna. At the entrance of the oviducts, the vagina turns posteriorly and forms the vagina interna, which narrows before leading into a long, well-developed Lang���s vesicle. The vagina externa, or vagina bulbosa, which is lined with a highly glandular muscular epithelium and is directed ventro-posteriorly, expands greatly before narrowing at the ventral genital pore. Biology. Armatoplana celta n. sp. was found among mussels growing on rocks and docks. Discussion. Due to the presence of tentacular and cerebral eyes series, separate gonopores, spermiducal bulbs instead of a seminal vesicle, a male copulatory organ with a long penis stylet, Lang���s vesicle and a vagina bulbosa groups the described species within the genus Armatoplana. Faubel, 1983 The most remarkable characters present by A. celta with respect to the 14 known species of Armatoplana (Table 2) are the presence of spermiducal bulbs and the long, curved stylet. These characters are only shared with A. lactea Laidlaw, 1903, A. panamensis (Plehn, 1896) and Armatoplana leptalea Marcus, 1947, respectively. However, A. celta can be distinguished from both species due to the absence of spermiducal bulbs in A. panamensis and A. leptalea that shows a true seminal vesicle, and the small, curved stylet in A. lactea. Distribution (Fig. 1, grey dots): The genus Armatoplana currently comprises 15 included A. celta species, most known from Central or South America. Four species are known from the shores of Africa while A. reishi (Hyman, 1959) and A. taurica (Jacubowa, 1909) are known from California and the Black Sea, respectively (Table 2). Armatoplana celta is the first record of the genus for the European Atlantic shores and the Iberian Peninsula., Published as part of Nore��a, Carolina, Rodr��guez, Jorge, P��rez, Jacinto & Almon, Bruno, 2015, New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral, pp. 157-172 in Zootaxa 4039 (1) on page 163, DOI: 10.11646/zootaxa.4039.1.7, http://zenodo.org/record/233785, {"references":["Faubel, A. (1983) The Polycladida, Turbellaria; Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80, 17 - 121.","Laidlaw, F. F. (1903) Suggestions for a revision of the classification of the polyclad Turbellaria. Memoirs and proceedings of the Manchester Literary & Philosophical Society, 48 (4), 1 - 16.","Plehn, M. (1896) Neue Polycladen, gesammelt von Herrn Kapitan Chierchia bei der Erdumschiffung der Korvett Vettor Pisani, von Herrn Prof. Dr. Kukenthal im nordlichem Eismeer und von Herrn Prof Dr. Semon in Java. Jenaische Zeitschrift, 30, 137 - 181.","Marcus, E. (1947) Turbellarios Marinhos do Brasil (5). Boletim da Facultade de Filosofia, Ciencias e Letras. Zoologia, Sao Paulo, 12, 99 - 215.","Hyman, L. H. (1959) Some Turbellaria from the coast of California. American Museum Novitates, 1943, 1 - 17.","Jacubowa, L. (1909) Die Polycladida der Bucht von Sevastopol. Memoires Presentes a l'Academie Imperiale des Sciences de St. - Petersbourg par Divers Savans et lus dans ses Assemblees, Serie VII, 24, 1 - 32."]}

Cryptocelis compacta Lang, 1884 Figure 4 Material examined. All specimens collected in R��a de Arousa, Galicia, Spain. One specimen found in the "Touro" area (15 /03/ 2011) coords. 42 �� 32.918 ' N / 08�� 58.278 ' W. Two specimens from ���A Ameixida��� (19 /03/ 2014), coords. 42 �� 32.058 ' N / 08�� 59.309 ' W. Description. Elongated worms 30���50 mm long and 10���20 mm wide. Lengths were dependent on if the specimens were moving (Fig. 4 A, B) or resting (Fig. 4 E,F) when photographed. The shape of the body also changed between the moving and resting stages, from slightly pointed with a rounded anterior (Fig. 4 A,B), to elongated with smooth parallel margins and rounded ends, slightly wider posteriorly (Fig. 4 E,F). Both dorsal and ventral surfaces appear translucent with whitish pigmentation (Fig. 4 A, B, E, F). Without tentacles. Marginal eyes around the entire body margin; cerebral eyes in two elongated patches, tentacular eyes small and rounded; frontal eyes scattered between tentacular and marginal eyes. Eye number and distribution pattern only visible in fixed and cleared individuals. Ruffled pharynx along the medial axis, well developed and folded (Fig. 4 C). Oral pore at the middle of the pharynx. Intestinal branches anastomosing, extending up to near the body margin. Body margin lacks intestinal branches. Male and female genital pores separate but close to each other (Fig. 4 C, D). Reproductive system (Fig. 4 C, D): Male copulatory apparatus comprises paired vasa deferentia, which join together before entering the male muscle bulb. The vasa deferentia develop to spermiducal vesicles. Before joining the common vas deferens, both ducts present a visible dilatation resembling an external or false seminal vesicle. The male apparatus is located anterior to the male pore and is directed backwards. The male bulb houses the intrabulbar prostatic vesicle. As characteristic for the genus, the prostatic vesicle is a massive, highly muscular cylinder, divided into a short proximal region and a longer distal region. The proximal region shows a muscular wall and glandular finger-like extensions that project into the lumen. The distal part of the prostatic vesicle is highly muscularized; its lumen is tubular and sinuous, with a glandular epithelial lining. The prostatic vesicle opens distally into a small male atrium through a blunt penis papilla. The female gonopore leads into a short rounded female atrium. Dorsal to the atrium lies the vagina externa, which has several pouches. The vagina then turns backwards at a right angle (parallel to the ventral surface) leading to the vagina interna and a bulbous extension that receives two oviducts from the anterior end of the body. Numerous cement glands surround the female apparatus, except around the terminal bulb area. Distribution (Fig. 1). Cryptocelis compacta was found on several occasions near A Ameixida (Ribeira, Ria de Arousa, Galicia, Spain), at depths between 5 and 7 metres under partially buried stones on a sandy bottom. Until now, C. compacta was only known in the Gulf of Naples in the Mediterranean basin. Therefore, this is the first record for this species in the North Atlantic Ocean., Published as part of Nore��a, Carolina, Rodr��guez, Jorge, P��rez, Jacinto & Almon, Bruno, 2015, New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral, pp. 157-172 in Zootaxa 4039 (1) on page 166, DOI: 10.11646/zootaxa.4039.1.7, http://zenodo.org/record/233785, {"references":["Lang, A. (1884) Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte (Zoologische Station in Neapel). Verlag von Wilhem Engelmann, Leipzig, 688 pp."]}