Search

The lacertid Latastia ornata was known to date only by its holotype collected in 1938 in Bafatá, central Guinea-Bissau. We report new specimens and localities from Guinea-Conakry, a new country record and major range extension of 700 km SE of the type-locality. We provide an updated diagnosis of the species, including the first genetic and osteological data, and confirm that Latastia ornata is closely related to, but distinct from, L. longicaudata based on external morphology, cranial osteology, DNA data and zoogeography.

Among Antarctic amphipods of the genus Eusirus, a highly distinctive clade of giant species is characterized by a dorsal, blade-shaped tooth on pereionites 5–7 and pleonites 1–3. This lineage, herein named ‘crested Eusirus’, includes two potential species complexes, the Eusirus perdentatus and Eusirus giganteus complexes, in addition to the more distinctive Eusirus propeperdentatus. Molecular phylogenies and statistical parsimony networks (COI, CytB and ITS2) of crested Eusirus are herein reconstructed. This study aims to formally revise species diversity within crested Eusirus by applying several species delimitation methods (Bayesian implementation of the Poisson tree processes model, general mixed Yule coalescent, multi-rate Poisson tree processes and automatic barcode gap discovery) on the resulting phylogenies. In addition, results from the DNA-based methods are benchmarked against a detailed morphological analysis of all available specimens of the E. perdentatus complex. Our results indicate that species diversity of crested Eusirus is underestimated. Overall, DNA-based methods suggest that the E. perdentatus complex is composed of three putative species and that the E. giganteus complex includes four or five putative species. The morphological analysis of available specimens from the E. perdentatus complex corroborates molecular results by identifying two differentiable species, the genuine E. perdentatus and a new species, herein described as Eusirus pontomedon sp. nov.

The rare symbiotic alpheid shrimp Salmoneus erasimorum Dworschak, Abed-Navandi & Anker, 2000 was previously known from a single specimen collected with a suction pump on the Croatian coast in the Adriatic Sea, together with its host, the ghost shrimp, Gilvossius tyrrhenus (Petagna, 1792). A second record of S. erasimorum is presented here, with a diagnosis and the first colour photographs, based on a single specimen collected in northern Brittany, France, also with a suction pump, but without its host. This is also the first record of the species on the European coast of the Atlantic Ocean. An annotated list and a key to the species of Salmoneus currently known from the eastern Atlantic and the Mediterranean Sea are provided.

Sea cucumber taxonomy and systematics has in the past heavily relied on gross external and internal anatomy, ossicle assemblage in different tissues, and molecular characterisation, with coloration, habitat, and geographical and bathymethric distribution also considered important parameters. In the present paper, we made these observations and techniques in detail and complemented them with the novel technique of micro-computed tomography of the calcareous ring. We investigated a single European species, the so-called gravel sea cucumber, Neopentadactyla mixta (Östergren, 1898), using recently collected material from the Chausey Islands, Normandy, France. We redescribed the species, illustrated its ossicle assemblage through scanning electron microscopy, and visualised the calcareous ring through stacking photography and through micro-CT scanning. Additionally, a DNA fragment of 955 base pairs of the 18S ribosomal RNA gene was sequenced from one specimen, which showed a high similarity with the only sequence of N. mixta publicly available. We completed this integrative study by providing a detailed distribution of the occurrence of N. mixta based on published, verifiable accounts.

Sea cucumber taxonomy and systematics has in the past heavily relied on gross external and internal anatomy, ossicle assemblage in different tissues, and molecular characterisation, with coloration, habitat, and geographical and bathymethric distribution also considered important parameters. In the present paper, we made these observations and techniques in detail and complemented them with the novel technique of micro-computed tomography of the calcareous ring. We investigated a single European species, the so-called gravel sea cucumber, Neopentadactylamixta (Östergren, 1898), using recently collected material from the Chausey Islands, Normandy, France. We redescribed the species, illustrated its ossicle assemblage through scanning electron microscopy, and visualised the calcareous ring through stacking photography and through micro-CT scanning. Additionally, a DNA fragment of 955 base pairs of the 18S ribosomal RNA gene was sequenced from one specimen, which showed a high similarity with the only sequence of N.mixta publicly available. We completed this integrative study by providing a detailed distribution of the occurrence of N.mixta based on published, verifiable accounts.

In 2015, we collected more than 60 000 scavenging amphipod specimens during two expeditions to the Clarion-Clipperton fracture zone (CCZ) in the Northeast (NE) Pacific and to the DISturbance and re-COLonisation (DisCOL) experimental area (DEA), a simulated mining impact disturbance proxy in the Peru Basin in the Southeast (SE) Pacific. Here, we compare biodiversity patterns of the larger specimens (> 15 mm) within and between these two oceanic basins. Eight scavenging amphipod species are shared between these two areas, thus indicating connectivity. Overall diversity was lower in the DEA (Simpson index, D = 0.62), when compared to the CCZ (D = 0.73), and particularly low at the disturbance site in the DEA and the site geographically closest to it. Local differences within each basin were observed too. The community compositions of the two basins differ, as evidenced by a non-metric dimensional scaling (NMDS) analysis of beta biodiversity. Finally, a single species, Abyssorchomene gerulicorbis (Schulenberger and Barnard, 1976), dominates the DEA with 60% of all individuals. This research has been supported by the JPI-Oceans project "Mining Impact" (BELSPO grant no. BR/15/MA/JPI-DEEPSEA2). Patel, T (corresponding author), Univ Ghent, Dept Biol, KL Ledeganckstr 35, B-9000 Ghent, Belgium. tpatel@naturalsciences.be

The Antarctic shelf s marine biodiversity has been greatly influenced by the climatic and glacial history of the region. Extreme temperature changes led to the extinction of some lineages, while others adapted and flourished. The amphipod genus Epimeria is an example of the latter, being particularly diverse. in the Antarctic region. By reconstructing a time-calibrated phylogeny based on mitochondrial (COI) and nuclear (28S and H3) markers and including Epimeria species from all oceans, this study provides a temporal and geographical framework for the evolution of Antarctic Epimeria. The monophyly of this genus is not supported by Bayesian Inference, as Antarctic and non-Antarctic Epimeria form two distinct well supported clades, with Antarctic Epimeria being a sister Glade to two stilipedid species. The monophyly of Antarctic Epimeria suggests that this Glade evolved in isolation since its origin. While the precise timing of this origin remains unclear, it is inferred that the Antarctic lineage arose from a late Gondwanan ancestor and hence did not colonize the Antarctic region after the continent broke apart from the other fragments of Gondwanaland. The initial diversification of the Glade occurred 38.04 Ma (95% HPD [48.46 Ma; 28.36 Ma]) in a cooling environment. Adaptation to cold waters, along with the extinction of cold-intolerant taxa and resulting ecological opportunities, likely led to the successful diversification of Epimeria on the Antarctic shelf. However, there was neither evidence of a rapid lineage diversification early in the Glade's history, nor of any shifts in diversification rates induced by glacial cycles. This suggests that a high turnover rate on the repeatedly scoured Antarctic shelf could have masked potential signals of diversification bursts. (C) 2017 Elsevier Inc. All rights reserved.

The Indo-Pacific portunid, Charybdis hellerii (A. Milne-Edwards, 1867), is a crab species native to the Indian and Western Pacific Oceans and has previously colonized the Eastern Mediterranean and the Western Atlantic. It is now recorded in the Eastern Atlantic, on the coast of Benin, where a thriving population has established. This invasive and widely distributed species exhibits morphological variations within and between populations, which are discussed in detail. Its current distribution is presented, and its future expansion along the West African coast and future impact on coastal ecosystems and local fisheries are the object of tentative forecasts. Illustrations of sexually mature specimens from different sizes and regions are presented, and their allometric, individual and geographical variations are discussed. A new synonymy and a new account on the taxonomy and the biology of the species are presented. Illustrations of the lectotype and the paralectotype of C. hellerii are also provided for the first time. Charybdis spinifera (Miers, 1884), C. merguiensis (De Man, 1887) and C. vannamei Ward, 1941 are here treated as subjective junior synonyms of C. hellerii. The holotype of C. spinifera and two syntypes of C. merguiensis are illustrated.

A new, over 10 cm long, sub-Antarctic shrimp, Fresnerhynchus crozeti n. gen., n. sp. is described based on a unique specimen collected with long lines at 1889 m on the slope of a seamount northwest of the Crozet Islands. It is included in the previously monotypic family Lipkiidae Burukovsky, 2012 based on morphological and molecular data. However, the posterior pereiopods of Fresnerhynchus are reminiscent to those of the Rhynchocinetidae, especially by the short spinose dactyli, and by the absence of a sternal plate. The elusive nature of F. crozeti, which is a large and highly characteristic shrimp, is attributed to its putative habitat (hard bottom, steep deep sea slopes), which is difficult to sample with conventional gear, and the remote geographical location. A brief discussion on the biogeography of Antarctic and sub-Antarctic decapods is provided. A review of Antarctic and sub-Antarctic dendrobranchiate and caridean shrimps is appended.

A new crested amphipod, Epimeria cleo sp. nov., is described after specimens collected in the western Ross Sea, Southern Ocean, at 151–409 m depth. This increases the number of Epimeria species known from the Ross Sea to eleven. This new species belongs to the subgenus Drakepimeria d'Udekem d'Acoz & Verheye, 2017. E. cleo sp. nov. has very robust walking pereiopods, no mid-dorsal tooth or bump on pereonites 1–2, no lateral tooth or angle on the lateral carina of coxa 4 and no pair of small teeth pointing upwards on urosomite 2. It is morphologically very similar to Epimeria leukhoplites d'Udekem d'Acoz & Verheye, 2017, E. reoproi Lörz & Coleman, 2001 and E. vaderi Coleman, 1998, the latter three species being known only from the Antarctic Peninsula and South Shetland Islands. Epimeria cleo sp. nov. can be distinguished from them by the following combination of characters: flexed rostrum, narrow coxa 3, long ventral tooth on coxa 4 and non-duplicate lateral tooth on pleonites 1–2. The phylogenetic relationships between E. cleo sp. nov. and other Epimeria of the subgenus Drakepimeria, for which DNA sequences are available, are briefly outlined based on a phylogenetic analysis of 28S rDNA fragments.

It is demonstrated here that Charcotia Chevreux, 1906 (Amphipoda) has priority over Charcotia Vayssiere, 1906 (Gastropoda), and that Waldeckia Chevreux, 1906 has to be treated as an invalid objective junior synonym of Charcotia Chevreux, 1906. An analysis of a part of the mitochondrial COI gene of Charcotia indicates that Charcotia obesa sensu lato, consists of two genetically distant clades that fulfil the criteria of genetic species. Each genetic clade corresponds to a different morphotype. The first one has a low triangular protrusion on the dorsal border of urosomite 1, a strong tooth on epimeron 3, and the posterodistal corner of the basis of pereiopod 7 is regularly rounded. It agrees with the original description of Charcotia obesa Chevreux, 1906. The second one has a protrusion of urosomite 1 prolongated by a sharp and usually long denticle, a small tooth on epimeron 3, and the posterodistal corner of the basis of pereiopod 7 is bluntly angular. The second form is treated herein as a new species, Charcotia amundseni sp. nov., which is described in detail. While the bathymetric distribution of the two Antarctic Charcotia species overlaps (0-300 m for C. obesa and 7-1200 m for C. amundseni sp. nov.), C. obesa largely predominates at depths of less than 150 m, while Charcotia amundseni sp. nov. predominates at greater depths. Both species are widely distributed and presumably circum-Antarctic. Cyril Gallut (Pierre et Marie Curie Universite, Paris) and Marc Eleaume (Museum National d'Histoire Naturelle, Paris) invited the first author to the Antarctic Biodiversity Workshop in Concarneau, 24 Oct. -2 Nov. 2016, where specimens used in the genetic study were found. Catherine Ozouf-Costaz (Museum national d'Histoire naturelle, Paris) proposed, as a hypothesis, that the toxicity of Charcotia obcsa to humans might be the consequence of fluoride accumulation (information communicated to us by Cyril Galin. The research programme led by Guillaume Lecointre, REVOLTA 1124 supported by the Institut polaire franeais Paul Emile Victor (IPEV) and the Museum national d'Histoire naturelle (MNHN) (via Laure Corbari) are acknowledged for giving us access to biological material of invaluable interest. The CAML-CEAMARC cruise of RSV Aurora Australis (IPY project no 53) was supported by the Australian Antarctic Division, the Japanese Science Foundation and the Institut polaire francais Paul Emile Victor (IPEV) (programme ICOTA). The authors wish to thank HIM Griffiths and Katrin Linse (British Antarctic Survey) who made the specimens collected by the RRS James Clark Ross available to us. Anton Van de Putte (RBINS) created the map. This publication is registered as CAML (Census of Antarctic Marine Life) publication No. 32 and ANDEEP contribution No. 216. This is contribution no. 018 to the vERSO project and contribution no. 002 of the rECTO project, funded by the Belgian Science Policy Office (BELSPO, contracts no 13R/132/A1/vERSO and no 13R/154/A1/RECTO). SEM photographs were carried out by Julien Cillis (RBINS) and we thank him for his efforts to generate the best pictures possible. Grcgorio Fernandez-Leborans (Universidad Complutense, Madrid) provided us with infotniation on epibiont protozoans living on crustaceans. Marlyn E.Y. Low (National University of Singapore) provided essential information for establishing the dates of publication of Charcotia Chevreux, 1906 and Charcotia Vayssiare, 1906. Sammy Dc Grave (Oxford Natural History Museum) and Philippe Bouchet (MNHN) also provided pertinent advice for handling this "thorny" nomenclatural issue. Tasnim Patel (PhD student at RBINS) checked the English text.

Eusiroidea is one of the 20 amphipod superfamilies that were erected to subdivide the very large and controversial suborder Gammaridea. Yet, the definition of the superfamily is not based on synapomorphies, but on a combination of diagnostic phenetic similarities that hold more or less consistently across families. Moreover, many of the characters used to define eusiroid families are suspected to show convergent evolution. The current classification of the Eusiroidea may therefore not reflect evolutionary relationships accurately. Here, we present a molecular phylogenetic re-analysis of the Eusiroidea based on a comparison of 18S and 28S rDNA sequences of 73 species, representing 47 genera and 16 families that potentially belong to the superfamily. The results suggest that at least species belonging to 14 of these traditional families would be part of a eusiroid clade, increasing by more than twofold the species and generic richness of the group. However, most of the eusiroid families surveyed do not appear monophyletic. Finally, the analyses show that several important morphological characteristics, traditionally used in eusiroid taxonomy, are homoplastic.

Background Finding of a single female specimen of the African mangrove crab Perisesarma alberti Rathbun, Bull Am Mus Nat Hist 43: 379–474, 1921, in the intertidal zone of the eastern part of the Bay of Seine, English Channel, France. Result Identification and description of the recorded crab, photographs and measurements of the single specimen. Comparison with reports from West African mangroves. Conclusion It is unlikely to assume an African origin of the collected species. It is more likely a species escaped from an aqua-terrarium, even if the common species in the French aquarium trade have an Australasian origin.

The present monograph includes general systematic considerations on the family Epimeriidae, a revision of the genus Epimeria Costa in Hope, 1851 in the Southern Ocean, and a shorter account on putatively related eusiroid taxa occurring in Antarctic and sub-Antarctic seas. The former epimeriid genera Actinacanthus Stebbing, 1888 and Paramphithoe Bruzelius, 1859 are transferred to other families, respectively to the Acanthonotozomellidae Coleman & J.L. Barnard, 1991 and the herein re-established Paramphithoidae G.O. Sars, 1883, so that only Epimeria and Uschakoviella Gurjanova, 1955 are retained within the Epimeriidae Boeck, 1871. The genera Apherusa Walker, 1891 and Halirages Boeck, 1891, which are phylogenetically close to Paramphithoe , are also transferred to the Paramphithoidae. The validity of the suborder Senticaudata Lowry & Myers, 2013, which conflicts with traditional and recent concepts of Eusiroidea Stebbing, 1888, is questioned. Eight subgenera are recognized for Antarctic and sub-Antarctic species of the genus Epimeria : Drakepimeria subgen. nov., Epimeriella K.H. Barnard, 1930, Hoplepimeria subgen. nov., Laevepimeria subgen. nov., Metepimeria Schellenberg, 1931, Pseudepimeria Chevreux, 1912, Subepimeria Bellan-Santini, 1972 and Urepimeria subgen. nov. The type subgenus Epimeria , as currently defined, does not occur in the Southern Ocean. Drakepimeria species are superficially similar to the type species of the genus Epimeria : E. cornigera (Fabricius, 1779), but they are phylogenetically unrelated and substantial morphological differences are obvious at a finer level. Twenty-seven new Antarctic Epimeria species are described herein: Epimeria (Drakepimeria) acanthochelon subgen. et sp. nov., E. (D.) anguloce subgen. et sp. nov., E. (D.) colemani subgen. et sp. nov., E. (D.) corbariae subgen. et sp. nov., E. (D.) cyrano subgen. et sp. nov., E. (D.) havermansiana subgen. et sp. nov., E. (D.) leukhoplites subgen. et sp. nov., E. (D.) loerzae subgen. et sp. nov., E. (D.) pandora subgen. et sp. nov., E. (D.) pyrodrakon subgen. et sp. nov., E. (D.) robertiana subgen. et sp. nov., Epimeria (Epimeriella) atalanta sp. nov., Epimeria (Hoplepimeria) cyphorachis subgen. et sp. nov., E. (H.) gargantua subgen. et sp. nov., E. (H.) linseae subgen. et sp. nov., E. (H.) quasimodo subgen. et sp. nov., E. (H.) xesta subgen. et sp. nov., Epimeria (Laevepimeria) anodon subgen. et sp. nov., E. (L.) cinderella subgen. et sp. nov., Epimeria (Pseudepimeria) amoenitas sp. nov., E. (P.) callista sp. nov., E. (P.) debroyeri sp. nov., E. (P.) kharieis sp. nov., Epimeria (Subepimeria) adeliae sp. nov., E. (S.) iota sp. nov., E. (S.) teres sp. nov. and E. (S.) urvillei sp. nov. The type specimens of E. (D.) macrodonta Walker, 1906, E. (D.) similis Chevreux, 1912, E. (H.) georgiana Schellenberg, 1931 and E. (H.) inermis Walker, 1903 are re-described and illustrated. Besides the monographic treatment of Epimeriidae from the Southern Ocean, a brief overview and identification keys are given for their putative and potential relatives from the same ocean, i.e., the Antarctic and sub-Antarctic members of the following eusiroid families: Acanthonotozomellidae Coleman & J.L. Barnard, 1991, Dikwidae Coleman & J.L. Barnard, 1991, Stilipedidae Holmes, 1908 and Vicmusiidae Just, 1990. This overview revealed the existence of a new large and characteristic species of Alexandrella Chevreux, 1911, A. chione sp. nov. but also shows that the taxonomy of that genus remains poorly known and that several ‘variable widespread eurybathic species’ probably are species complexes. Furthermore, the genera Bathypanoploea Schellenberg, 1939 and Astyroides Birstein & Vinogradova, 1960 are considered to be junior synonyms of Alexandrella . Alexandrella mixta Nicholls, 1938 and A. pulchra Ren in Ren & Huang, 1991 are re-established herein, as valid species. It is pointed out that this insufficient taxonomic knowledge of Antarctic amphipods impedes ecological and biogeographical studies requiring precise identifications. Stacking photography was used for the first time to provide iconographic support in amphipod taxonomy, and proves to be a rapid and efficient illustration method for large tridimensionally geometric species. A combined morphological and molecular approach was used whenever possible for distinguishing Epimeria species, which were often very similar (albeit never truly cryptic) and sometimes exhibited allometric and individual variations. However in several cases, taxa were characterized by morphology only, whenever the specimens available for study were inappropriately fixed or when no sequences could be obtained. A large number of Epimeria species, formerly considered as eurybathic and widely distributed, proved to be complexes of species, with a narrower (overlapping or not) distribution. The distributional range of Antarctic Epimeria is very variable from species to species. Current knowledge indicates that some species from the Scotia Arc and the tip of the Antarctic Peninsula are narrow range endemics, sometimes confined to one island, archipelago, or ridge (South Georgia, South Orkney Islands, Elephant Island or Bruce Ridge); other species have a distribution encompassing a broader region, such as the eastern shelf of the Weddell Sea, or extending from the eastern shelf of the Weddell Sea to Adelie Coast. The most widely distributed species are E. (D.) colemani subgen. et sp. nov., E. (E.) macronyx (Walker, 1906), E. (H.) inermis Walker, 1903 and E. (L.) walkeri (K.H. Barnard, 1930), which have been recorded from the Antarctic Peninsula/South Shetland Islands area to the western Ross Sea. Since restricted distributions are common among Antarctic and sub-Antarctic Epimeria , additional new species might be expected in areas such as the Kerguelen Plateau, eastern Ross Sea, Amundsen Sea and the Bellingshausen Sea or isolated seamounts and ridges, where there are currently no Epimeria recorded. The limited distribution of many Epimeria species of the Southern Ocean is presumably related to the poor dispersal capacity in most species of the genus. Indeed with the exception of the pelagic and semi-pelagic species of the subgenus Epimeriella , they are heavy strictly benthic organisms without larval stages, and they have no exceptional level of eurybathy for Antarctic amphipods. Therefore, stretches deeper than 1000 m seem to be efficient geographical barriers for many Epimeria species, but other isolating factors (e.g., large stretches poor in epifauna) might also be at play. The existence of endemic shelf species with limited dispersal capacities in the Southern Ocean (like many Epimeria ) suggests the existence of multiple ice-free shelf or upper slope refugia during the Pleistocene glaciations within the distributional and bathymetric range of these species. Genera with narrow range endemics like Epimeria would be excellent model taxa for locating hotspots of Antarctic endemism, and thus potentially play a role in proposing meaningful Marine Protected Areas (MPAs) in the Southern Ocean.

Made available in DSpace on 2021-06-25T12:17:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-11-23 Villanova Univ, Dept Biol, Villanova, PA 19085 USA Museu Nacl Hist Nat & Ciencia, Lisbon, Portugal Univ Brasilia, Dept Zool, Inst Ciencias Biol, BR-70910900 Brasilia, DF, Brazil Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560 USA Sorbonne Univ, Museum Natl Hist Nat, ISYEB, Paris, France Univ Nacl Tucuman, San Miguel De Tucuman, Argentina King Saud Univ, Riyadh, Saudi Arabia Cornell Univ, Ithaca, NY USA Univ Fed Sao Paulo, Diadema, Brazil Upper Austrian Museum, Ctr Biol, Linz, Austria Villanova Univ, Villanova, PA 19085 USA Univ Salzburg, Salzburg, Austria Plazi, Bern, Switzerland Univ Brasilia, Brasilia, DF, Brazil Univ Sao Paulo, Ribeirao Preto, Brazil Zool Forsch Museum A Koenig, Bonn, Germany Museu Paraense Emilio Goeldi, Belem, Para, Brazil Russian Acad Sci, St Petersburg, Russia Pontificia Univ Catolica Rio Grande do Sul, Porto Alegre, RS, Brazil Museo Reg Sci Nat, Turin, Italy Univ Fed Rio Grande do Sul, Porto Alegre, RS, Brazil Royal Museum Cent Africa, Tervuren, Belgium Univ Nacl Autonoma Mexico, Mexico City, DF, Mexico Univ Innsbruck, Inst Ecol, Innsbruck, Austria Hasselt Univ, Hasselt, Belgium Univ Fed Pernambuco, Recife, PE, Brazil Univ Fed Espirito Santo, Vitoria, ES, Brazil Univ Nacl Misiones, Felix De Azara, Argentina Albany Museum, Grahamstown, South Africa Natl Museum, Bloemfontein, South Africa Senckenberg Nat Hist Sammlungen, Dresden, Germany Univ Estadual Paulista, Botucatu, SP, Brazil Stephen F Austin State Univ, Nacogdoches, TX 75962 USA Landesmuseum, Leonding, Austria Univ Camerino, Camerino, Italy Univ Fed ABC, Sao Bernardo, Brazil Univ Estadual Londrina, Museu Zool, Londrina, Parana, Brazil Senckenberg Res Inst, Frankfurt, Germany Museo Civ Storia Nat, Carmagnola, Italy Polskiej Akad Nauk, Muzeum & Inst Zool, Warsaw, Poland Museo Civ Storia Nat, Genoa, Italy Russian Acad Sci, Inst Zool, St Petersburg, Russia Univ Estadual Paulista, Sao Vicente, Brazil Sorbonne Univ, ISYEB, Museum Natl Hist Nat, Paris, France Port Elizabeth Museum, Port Elizabeth, South Africa Sam Noble Museum, Norman, OK USA Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA North West Univ, Potchefstroom, South Africa Museu Nacl, Rio De Janeiro, Brazil Nat Hist Museum, Basel, Switzerland Senckenberg Nat Kundemuseum, Gorlitz, Germany North Carolina Museum Nat Sci, Raleigh, NC USA Univ Rennes 1, Rennes, France Univ Sao Paulo, Museu Zool, Sao Paulo, SP, Brazil Amer Museum Nat Hist, New York, NY 10024 USA Univ Huddersfield, Huddersfield, W Yorkshire, England North Dakota State Univ, Fargo, ND USA Univ Sao Paulo, Sao Paulo, SP, Brazil Fac Sci Sfax, Sfax, Tunisia DPTC PC, Manaus, Amazonas, Brazil Louisiana State Univ, Museum Nat Sci, Baton Rouge, LA 70803 USA Zool Survey India, Kolkata, India Univ Tennessee, Chattanooga, TN USA Ohio State Univ, Columbus, OH 43210 USA Univ Luterana Brasil, Museu Ciencias Nat, Canoas, Brazil Univ Firenze, Florence, Italy Univ Ovidius Constanta, Constanta, Romania Univ Mississippi, Oxford, MS USA Royal Belgian Inst Nat Sci, Brussels, Belgium Univ New Mexico, Albuquerque, NM 87131 USA Inst Nacl de Pesquisas da Amazonia, Manaus, Amazonas, Brazil Univ Stellenbosch, Matieland, South Africa Univ Fed Minas Gerais, Belo Horizonte, MG, Brazil CIBIO Ctr Invest Biodiversidade & Recursos Genet, Vairao, Portugal Museum Hist Nat, Geneva, Switzerland Univ Fed Mato Grosso, Cuiaba, Brazil Univ Austral Chile, Valdivia, Chile Univ Malaysia, Sarawak, Malaysia Indian Inst Sci, Bangalore, Karnataka, India Scottish Assoc Marine Sci, Oban, Argyll, Scotland Sam Houston State Univ, Huntsville, TX 77340 USA Museo Nacl Ciencias Nat, Madrid, Spain Sorbonne Univ, CR2P, Museum Natl Hist Nat, Paris, France Drexel Univ, Acad Nat Sci, Philadelphia, PA 19104 USA Univ Richmond, Richmond, VA 23173 USA Ctr Pesquisas Cacau, Itabuna, Brazil Univ Torino, Turin, Italy Soc Hist Nat Alcide dOrbigny, Aubiere, France Wolfden Sci Consulting, Murcia, Spain Univ Fed Rio de Janeiro, Macae, Brazil Univ Tennessee, Knoxville, TN USA Inst Humboldt, Villa De Leyva, Colombia Escuela Politec Nacl, Quito, Ecuador Calif Acad Sci, San Francisco, CA 94118 USA Museum Dept Hist Nat Var, Toulon, France Nat Environm & Wildlife Soc, Angul, India Univ Kansas, Lawrence, KS 66045 USA Kyoto Univ, Kyoto, Japan Consejo Nacl Invest Cient & Tecn, Museo Argentino Ciencias Nat Bernardino Rivadavia, Buenos Aires, DF, Argentina Univ Fed Paraiba, Joao Pessoa, Paraiba, Brazil Univ Fed Parana, Curitiba, Parana, Brazil Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil Nat Hist Museum Narodini Museum, Prague, Czech Republic Nat Hist Museum Zimbabwe, Bulawayo, Zimbabwe Ateneo Manila Univ, Quezon City, Philippines Pontificia Univ Javeriana, Bogota, Colombia RACINE, St Maugan, France Univ Paris 06, Sorbonne Univ Paris, ISYEB, Paris, France Ocean Univ China, Qingdao, Peoples R China Museo Nacl Hist Nat Paraguay, San Lorenzo, Paraguay Univ Carabobo, Valencia, Venezuela Natl Ctr Biol Sci, Bengaluru, India Univ Nebraska, Lincoln, NE USA CENAK Ctr Nat Kunde, Hamburg, Germany Ohio Hist Connect, Columbus, OH USA Univ Fed Amazonas, Manaus, Amazonas, Brazil Univ Malaga, Malaga, Spain Chinese Acad Sci, Qingdao, Shandong, Peoples R China Benemerita Univ Autonoma Puebla, Puebla, Mexico Natl Polytech Inst, Ctr Res & Adv Studies, Irapuato, Mexico Field Museum Nat Hist, Chicago, IL 60605 USA Univ Texas El Paso, El Paso, TX 79968 USA Univ Fed Lavras, Lavras, Brazil Nat Hist Museum, Vienna, Austria La Sierra Univ, Riverside, CA USA Univ San Francisco Quito, Quito, Ecuador Univ Hong Kong, Hong Kong, Peoples R China CUNY, New York, NY 10021 USA CAS, Inst Vertebrate Biol, Brno, Czech Republic Sorbonne Univ, MECADEV, Museum Natl Hist Nat, Paris, France Univ Estadual Paulista, Rio Claro, Brazil Zool Staatssammlung Munchen, Munich, Germany Univ Michigan, Dearborn, MI 48128 USA Smithsonian Inst, Natl Museum Nat Hist, Washington, DC USA Helmholtz Ctr Environm Res, Leipzig, Germany Santa Rosa Jr Coll, Santa Rosa, CA USA George Washington Univ, Washington, DC 20037 USA Inst Teknol Bandung, Bandung, Indonesia Earlham Coll, Richmond, IN USA Senckenberg Forschungsinst & Nat Museum, Frankfurt, Germany Univ Estadual Londrina, Londrina, Parana, Brazil Univ Koblenz Landau, Koblenz, Germany Nat Hist Museum, London, England Ditsong Natl Museum Nat Hist, Pretoria, South Africa Bombay Nat Hist Soc, Bombay, Maharashtra, India Philipps Univ Marburg, Marburg, Germany Hess Landesmuseum, Darmstadt, Germany Smithsonian Conservat Biol Inst, Washington, DC USA Univ Pannonia, Keszthely, Hungary Staatliches Museum Nat Kunde, Stuttgart, Germany UFT, Tocantins, Portugal Museum Nat Kunde, Berlin, Germany Nat Hist Riksmuseet, Stockholm, Sweden Hikarigaoka, Munakata, Japan Inst Agr & Environm Sci, Tartu, Estonia Univ Los Andes, Merida, Venezuela Bat Jungle, Monteverde, Costa Rica Texas A&M Univ, College Stn, TX USA Yale Univ, New Haven, CT USA Univ Estadual Paulista, Sao Jose Do Rio Preto, Brazil Museo Nacl Hist Nat, Montevideo, Uruguay Consejo Nacl Invest Cient & Tecn, Fdn Miguel Lillo, San Miguel De Tucuman, Argentina Roger Tory Peterson Inst Nat Hist, Jamestown, VA USA Univ Fed Reconcavo Bahia, Cruz Das Almas, Brazil South China Normal Univ, Guangzhou 510631, Guangdong, Peoples R China Museu Ciencias Tecnol PUCRS, Porto Alegre, RS, Brazil Univ Fed Tocantins, Porto Nacl, Brazil Univ Toronto, Scarborough, ON, Canada Univ Nacl Colombia, Inst Ciencias Nat, Bogota, Colombia Natl Museum Philippines, Manila, Philippines NOVA Univ Lisbon, Caparica, Portugal Royal Saskatchewan Museum, Regina, SK, Canada Deutsch Zentrum Marine Biodiversitatsforsch, Hamburg, Germany Ctr Invest Biol Noroeste, La Paz, Mexico Naturalis Biodivers Ctr, Leiden, Netherlands Univ Douala, Douala, Cameroon Vet & Farmaceut Univ Brno, Brno, Czech Republic Univ Swaziland, Kwaluseni, Eswatini Fundacao Oswaldo Cruz, Rio De Janeiro, Brazil Univ Claude Bernard, Lyon, France Museum Vertebrate Zool, Berkeley, CA USA Smithsonian Inst, Washington, DC 20560 USA Nat Hist Museum & Inst, Chiba, Japan Senckenberg Biodiversitat & Klima Forschunsgzentr, Frankfurt, Germany Marquette Univ, Milwaukee, WI 53233 USA Univ Firenze, Museo Storia Nat, Florence, Italy Univ Fed Bahia, Salvador, BA, Brazil Fed Univ ABC, Sao Bernardo, Brazil Univ Fed Goias, Goiania, Go, Brazil Univ Alaska Museum, Fairbanks, AK USA Egerton Univ, Egerton, Kenya Museo Hist Nat, Lima, Peru IKIAM Univ Reg Amazon, Tena, Ecuador Univ Hyogo, Sanda, Japan Inst Rech Dev, Paris, France Univ Sao Paulo, Piracicaba, Brazil Niedersachs Landesbetrieb Wasserwirtschaft Kusten, Hannover, Germany Univ Complutense Madrid, Madrid, Spain Consejo Nacl Invest Cient & Tecn, Ctr Nacl Patagon, Puerto Madryn, Argentina Roosevelt Univ, Coll Profess Studies, Chicago, IL 60605 USA Western Kentucky Univ, Bowling Green, KY 42101 USA Univ Naples Federico II, Naples, Italy Univ Fed Acre, Rio Branco, Acre, Brazil Univ Fed Santa Catarina, Florianopolis, SC, Brazil Inst Bio & Geociencias Noroeste Argentino, Salta, Argentina Inst Venezolano Invest Cient, Caracas, Venezuela Umweltbundesamt, Vienna, Austria Penclen, Plumelec, France CNRS MNHN UPMC, Ctr Rech Paleobiodivers & Paleoenvironm, Paris, France Staatl Museum Nat Kunde, Stuttgart, Germany Consejo Nacl Invest Cient & Tecn, Museo Argentino Ciencias Nat Bernardino Rivada, Buenos Aires, DF, Argentina Ctr Biol Gest Populat INRA, Montferrier Sur Lez, France Loyola Univ Chicago, Chicago, IL USA Pontificia Univ Catolica Rio do Sul, Porto Alegre, RS, Brazil Durban Museum Nat Sci, Durban, South Africa Univ Estado Amazonas, Manaus, Amazonas, Brazil Brigham Young Univ, Provo, UT 84602 USA Museo Hist Nat La Salle, Caracas, Venezuela Univ Vet Med Hannover, Hannover, Germany Australian Museum, Sydney, NSW, Australia Texas Tech Univ, Lubbock, TX 79409 USA Francis Marion Univ, Florence, SC USA Univ Washington, Seattle, WA 98195 USA Univ Connecticut, Groton, CT USA Fed Univ ABC, Santo Andre, SP, Brazil Univ Fed Uberlandia, Uberlandia, MG, Brazil Fed Univ Para, Belem, Para, Brazil Yale Peabody Museum, New Haven, CT USA Univ Texas Arlington, Arlington, TX 76019 USA Senckenberg Deutsch Entomol Inst, Muncheberg, Germany CSIRO, Natl Res Collect, Canberra, ACT, Australia Univ Venda, Thohoyandou, South Africa Univ Ulsan, Ulsan, South Korea Univ Estadual Sao Paulo, Botucatu, SP, Brazil Senckenberg Forsch Inst & Nat Museum, Frankfurt, Germany Ocean Univ China, Inst Marine Biodivers & Evolut, Qingdao, Shandong, Peoples R China Univ Fed Para, Altamira, Brazil Univ Estadual Paulista, Assis, Brazil UPMC, Ctr Rech Paleobiodiversite & Paleoenvironm, CNRS, MNHN, Paris, France Tech Univ Kaiserslautern, Kaiserslautern, Germany Charles Univ Prague, Dept Zool, Prague, Czech Republic Univ Nacl Expt los Llanos Occident Ezequiel Zamor, Guanare, Venezuela Long Isl Univ, Brooklyn, NY USA Univ Ryukyus, Okinawa, Japan Pontificia Univ Catolica Ecuador, Museo Zool, Escuela Ciencias Biol, Quito, Ecuador Indiana Univ Penn, Indiana, PA USA IRD, Dakar, Senegal State Museum Nat Hist Karlsruhe, Karlsruhe, Germany Univ Toulouse III Paul Sabatier, Toulouse, France Univ Ghent, Ghent, Belgium Univ Antwerp, Antwerp, Belgium Karlsruhe Inst Technol, Karlsruhe, Germany Ctr Cellular & Mol Biol, Hyderabad, India Univ Fed ABC, Santo Andre, Brazil Yale Peabody Museum Nat Hist, New Haven, CT USA Univ Innsbruck, Mondsee, Austria Bethune Cookman Univ, Daytona Beach, FL USA Natl Museum Nat & Sci, Tokyo, Japan Zool Garten Koln, Cologne, Germany Univ Estadual Paulista, Botucatu, SP, Brazil Univ Estadual Paulista, Sao Vicente, Brazil Univ Estadual Paulista, Rio Claro, Brazil Univ Estadual Paulista, Sao Jose Do Rio Preto, Brazil Univ Estadual Paulista, Assis, Brazil

The amphipod genus Epimeria is very speciose in Antarctic waters. Although their brooding biology, massive and heavily calcified body predict low dispersal capabilities, many Epimeria species are documented to have circum-Antarctic distributions. However, these distribution records are inevitably dependent on the morphological species definition. Yet, recent DNA evidence suggests that some of these Epimeria species may be complexes of species with restricted distributions. Mitochondrial COI and nuclear 28S rDNA sequence data were used to infer evolutionary relationships among 16 nominal Epimeria species from the Antarctic Peninsula, the eastern Weddell Sea and the Ad,lie Coast. Based on this phylogenetic framework, we used morphology and the DNA-based methods GMYC, bPTP and BPP to investigate species boundaries, in order to revise the diversity and distribution patterns within the genus. Most of the studied species appeared to be complexes of pseudocryptic species, presenting small and previously overlooked morphological differences. Altogether, 25 lineages were identified as putative new species, increasing twofold the actual number of Antarctic Epimeria species. Whereas most of the species may be geographically restricted to one of the three studied regions, some still have very wide distribution ranges, hence suggesting a potential for large-scale dispersal.

A new abyssal liljeborgiid amphipod from the equatorial eastern Atlantic Ocean (00°40.49′N, 005°29.71′W, 5142 m), Liljeborgia (Lilljeborgiella) famelicosa is described. The new species is very similar to L. mozambica Ledoyer, 1986 from the southwestern Indian Ocean. A key and checklist is also provided to species of Liljeborgia recorded from below 1000 m. The capacity of large range dispersal in Liljeborgia lineages is briefly discussed.

Made available in DSpace on 2018-12-11T17:19:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-03-14 Museu de Zoologia da Universidade de São Paulo Chelonian Research Institute Bernice Pauahi Bishop Museum International Commission on Zoological Nomenclature Department of Marine Invertebratesn Museum School of Biological Earth & Environmental Sciences University of New South Wales Departamento de Biodiversidad y Biología Evolutiva Museo Nacional de Ciencias Naturales (CSIC) Department of Biology University of Washington Universidad de Atacama Copiapó and Programa de Doctorado en Sistemática y Biodiversidad Facultad de Ciencias Naturales y Oceanográficas Universidad de Concepción Department of Biological Sciences National University of Singapore Biodiversity and Biocomplexity Unit Okinawa Institute of Science and Technology, Kunigami District Laboratório de Ictiologia Departamento de Zoologia IBB-UNESP Campus de Botucatu FishBase Information and Research Group IRRI Campus Comparative Plant and Fungal Biology Department Royal Botanic Gardens Kew Zoologische Staatssammlung München Staatliche Naturwissenschaftliche Sammlungen Bayerns Department of Life Sciences Natural History Museum Australian National Herbarium Centre for Australian National Biodiversity Research CSIRO National Research Collections Australian Capital Territory College of Medicine Biology and Environment Research School of Biologyn National Universityn Capital Territory Hawkesbury Institute for the Environment Western Sydney University Canadian National Collection of Insects Arachnids and Nematodes Agriculture and Agri-Food Canada Institut de Systématique Evolution Biodiversité Muséum National d'Histoire Naturelle Sorbonne Universités Division of Invertebrate Zoology American Museum of Natural History Department of Biology Hofstra University Naturalis Biodiversity Center Royal Belgian Institute of Natural Sciences School of Life Sciences University of KwaZulu-Natal Plant Gateway Ltd. Department of Natural Sciences Gardner-Webb University Department of Biology Villanova University Potato Research Center Georgikon Faculty University of Pannonia Dipartimento di Biologia e Biotecnologia 'Charles Darwin' Sapienza Università di Roma Department of Earth and Planetary Sciences Johns Hopkins University Department of Environmental Science and Technology University of Maryland Department of Plant Medicine Chungbuk National University Hawai‘i Institute of Marine Biology University of Hawai‘i Institute of Marine Science University of Auckland Centre for Agricultural Research Hungarian Academy of Sciences Department of Zoology Eszterházy Károly University Herbarium School of Biological Sciences University of Reading Instituto de Ciencias Ambientales y Evolutivas Facultad de Ciencias Universidad Austral de Chile Department of Biosciences University of Helsinki Ornithological Nomenclature Expert Green Plant Herbarium Department of Natural History Royal Ontario Museum Nomenclature Specialist CITES Animals Committee; Turtle Conservancy Global Wildlife Conservation Department of Plant Anatomy Institute of Biology Eötvös Loránd University Department of Biosciences (Plant Biology) Viikki Plant Science Centre Illinois Natural History Survey Institute of Biodiversity Science and Sustainability California Academy of Sciences Royal Botanic Gardens Kew NTNU University Museum Norwegian University of Science and Technology Institut de Biologia Evolutiva Universitat Pompeu Fabra Bioveyda Biodiversity Inventories and Research Department of Plant Biology Ecology & Evolution and Herbarium Oklahoma State University Research School of Earth Sciencesn National Universityn Capital Territory Departamento de Biologia Animal Instituto de Biologia Universidade Estadual de Campinas Senckenberg Naturhistorische Sammlungen Department of Biology University of Copenhagen Department of Botany Smithsonian Institution National Museum of Natural History Plant Pest Diagnostics Branch California Department of Food and Agriculture PPG Zoologia Departamento de Zoologia Instituto de Ciências Biológicas Universidade Federal de Minas Gerais Macleay Museum University of Sydney Centre for Ecology and Hydrology Edinburgh Research Station Laboratório de Coleções Zoológicas Instituto Butantan Environmental Management School of Applied and Biomedical Science Federation University PPG Biodiversidade Animal Universidade Federal de Santa Maria National Museum of Natural History Smithsonian Institution Department of Terrestrial Zoology Western Australian Museum Museu Nacional da História Natural e da Ciência Universidade de Lisboa The Kyoto University Museum Kyoto University Finnish Museum of Natural History (Botany) University of Helsinki Royal Botanic Garden Edinburgh School of Biological Sciences and Environment Institute University of Adelaide Nees Institut für Biodiversität der Pflanzen Universität Bonn Department of Plant Science and Biotechnology University of Pannonia Lee Kong Chian Natural History Museum National University of Singapore Denver Botanic Gardens Department of Biology Earlham College Montana Entomology Collection Montana State University School of Environmental Sciences University of Guelph Instituto de Ambiente de Montaña y Regiones Áridas Universidad Nacional de Chilecito Martha N. and John C. Moser Chair in Arthropod Systematics and Biological Diversity The Ohio State University Department of Biology Victor Valley College Identification and Naming Department Royal Botanic Gardens Kew Natural History Laboratory Faculty of Science Ibaraki University Natural History Museum and Botanical Garden University of Tartu Plant Protection Institute Centre for Agricultural Research Hungarian Academy of Sciences Department of Zoology Denver Museum of Nature & Science Department of Systematic and Evolutionary Botany Universität Wien FishBase Department of Zoology Swedish Museum of Natural History Department of Zoology Museo Civico di Storia Naturale of Verona Departamento de Zoologia Universidade Federal do Paraná Sezione di Zoologia degli Invertebrati e Idrobiologia MUSE-Museo delle Scienze di Trento Centro de Ciências Agrárias Ambientais e Biológicas Universidade Federal do Recôncavo da Bahia Department of Biological Sciences University of Toronto Department of Environmental Science and Policy George Mason University Natural History Museum of Geneva Department of Genetics and Evolution University of Geneva Departamento de Zoologia Universidade de Brasília Department of Integrative Biology Oregon State Arthropod Collection Oregon State University Henares 16 Velilla de San Antonio Department of Vertebrate Zoology National Museum of Natural History Smithsonian Institution International Committee on Bionomenclature Universidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e Veterinárias Jaboticabal Departamento de Biologia Aplicada à Agropecuária Faculty of Biology Alexandru Ioan Cuza University of Iași Departamento de Biología Universidad de Los Andes Laboratorio de Morfología Animal Universidad Autónoma del Estado de Hidalgo H.W. Manter Laboratory of Parasitology University of Nebraska-Lincoln Robert Bebb Herbarium (OKL) University of Oklahoma Oklahoma Biological Survey Department of Microbiology and Plant Biology Fiocruz Mata Atlântica Fundação Oswaldo Cruz Department of Civil and Environmental Engineering Ehime University Department of Zoology Hungarian Natural History Museum Department of Science Education Hiroshima University Department of Earth Sciences Natural History Museum Kazan Federal University Museum für Naturkunde Leibniz-Institut für Evolutions-und Biodiversitätsforschung Centro de Investigación de la Biodiversidad y Cambio Climático (BioCamb) e Ingeniería en Biodiversidad y Recursos Genéticos Universidad Tecnológica Indoamérica Integrated Taxonomic Information System National Museum of Natural History Smithsonian Institution Natural History Museum of Denmark Department of Botany Szent István University University of Sydney Zoological Museum of Lomonosov Moscow State University Biodiversity Institute University of Kansas CITES Scientific Authority Finnish Museum of Natural History (Botany) University of Helsinki Instituto de Botânica Department of Entomology Kerala Agricultural University University of Michigan Herbarium EEB Chelonian Research Foundation Turtle Conservancy Instituto de Ciencias Marinas y Limnológicas Facultad de Ciencias Universidad Austral de Chile Kansas Biological Survey and the Biodiversity Institute University of Kansas Laboratório de Ecologia e Conservação Universidade Federal do Mato Grosso do Sul Sciences Department Museums Victoria Department of Biology and Museum of Vertebrate Biology Portland State University Department of Biological Sciences Texas Tech University Staatliches Museum für Naturkunde Stuttgart Department of Bioinformatics and Genetics Swedish Museum of Natural History Laboratorio de Sistemática y Biología Comparada de Insectos Instituto de Ciencias Naturales Universidad Nacional de Colombia Global Biodiversity Information Facility Fragile Inheritance Natural History National Focal Point to the Convention on Biological Diversity Royal Belgian Institute of Natural Sciences Department of Biology Pittsburg State University Departamento de Zoologia Instituto de Biociências Universidade de São Paulo Agricultural Research Council Plant Protection Research Instituten National Collection of Insects Section of Mollusks Carnegie Museum of Natural History Department of Zoology Faculty of Science Charles University Museo Argentino de Ciencias Naturales Bernardino Rivadavia National Parks Board Botanic Gardens Department of Ecology and Evolutionary Biology University of Kansas Judicial Commission on Prokaryote Nomenclature Botanische Staatssammlung München and SNSB IT Center Staatliche Naturwissenschaftliche Sammlungen Bayerns Permanent ICN Nomenclature Committee for Fungi International Mycological Association Museo Nacional de Ciencias Naturales (CSIC) Dipartimento di Scienze della Vita e Biologia dei Sistemi Università di Torino Istituto per la Protezione Sostenibile delle Piante sez. di Torino CNR Department of Environmental Sciences University of Basel Allwetterzoo Münster Department of Biology University of Hawai'i at Manoa UNC Herbarium (NCU) North Carolina Botanical Garden University of North Carolina at Chapel Hill Abteilung Morphologie und Systematik der Tiere und Zoologisches Museum Universität Göttingen Unité Mixte de Recherche Peuplements Végétaux et Bioaggresseurs en Milieu Tropical Université de La Réunion Essig Museum of Entomology University of California Berkeley General Committee for Nomenclature [for algae fungi and plants] Royal Botanic Gardens and Domain Trust Smithsonian Marine Station Molecular Ecology and Fisheries Genetics Lab School of Biological Sciences Bangor University Department of Entomology Entomology Research Museum University of California Australian National Insect Collection CSIRO National Research Collections Australian Capital Territory School of Life Sciences Biodiversity Knowledge Integration Center Hasbrouck Insect Collection Arizona State University Landcare Research School of Biological Sciences University of Auckland Institute of Zoology Chinese Academy of Sciences, Chaoyang District Laboratório de Ictiologia Departamento de Zoologia IBB-UNESP Campus de Botucatu Universidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e Veterinárias Jaboticabal Departamento de Biologia Aplicada à Agropecuária

The large and common Scandinavian amphipod Liljeborgia fissicornis (M. Sars) is split into four species: the deep-water L. caliginis sp. nov. and L. charybdis sp. nov., and the shallow-water L. fissicornis and L. ossiani sp. nov. The poorly known species L. polosi Barnard and Karaman, recorded from the deep Canadian Basin of the Arctic Ocean, is considered as belonging to the same group. All those northern species are completely devoid of eyes, while similar species from the Antarctic and sub-Antarctic continental shelf do have eyes. It is hypothesized that the group fissicornis, which is specific to cold waters, derives from ancestors living on the continental shelf of the Southern Ocean. These ancestors would have adapted to deep-sea environments, losing their eyes completely. Then they would have migrated northwards through the cold abyss, and reached the cold but shallow waters of the Arctic/sub-Arctic continental shelf, without redeveloping visual organs.

[A new species of Melphidippa, M. willemiana sp. nov. is recorded from the coldest parts of Svalbard. This species, which has High-Arctic affinities, is described and illustrated in detail. A tentative comparison is made with the East Siberian M. macruroides Gurjanova, 1946 after the descriptions by Gurjanova. A key to the European Melphidippidae is presented. Une nouvelle espece de Melphidippa , M. willemiana sp. nov. est signalee dans les parties les plus froides du Svalbard. Cette espece qui a des affinites hautes-arctiques est decrite et illustree en detail. Elle est comparee avec l'espece de l'Est de la Siberie, M. macruroides Gurjanova, 1946, en se referant aux descriptions de Gurjanova. Une cle d'identification des Melphidippidae europeens est presentee. , A new species of Melphidippa, M. willemiana sp. nov. is recorded from the coldest parts of Svalbard. This species, which has High-Arctic affinities, is described and illustrated in detail. A tentative comparison is made with the East Siberian M. macruroides Gurjanova, 1946 after the descriptions by Gurjanova. A key to the European Melphidippidae is presented. Une nouvelle espece de Melphidippa , M. willemiana sp. nov. est signalee dans les parties les plus froides du Svalbard. Cette espece qui a des affinites hautes-arctiques est decrite et illustree en detail. Elle est comparee avec l'espece de l'Est de la Siberie, M. macruroides Gurjanova, 1946, en se referant aux descriptions de Gurjanova. Une cle d'identification des Melphidippidae europeens est presentee. ]

New data on the warm temperate and tropical east Atlantic Bathyporeia species are presented. Four new species are described: Bathyporeia cunctator sp. nov. from South Africa, B. chevreuxi sp. nov. from Senegal, B. gladiura sp. nov. from South Africa, and B. griffithsi sp. nov. from Namibia. Bathyporeia cunctator sp. nov. and B. chevreuxi sp. nov. are very closely related to the west European B. tenuipes Meinert, 1877 and the Mediterranean B. lindstromi Stebbing, 1906; these four cryptic species forming the complex tenuipes. Bathyporeia griffithsi sp. nov. and B. gladiura sp. nov. are highly distinctive new species. The morphotype “sunnivae” of Bathyporeia guilliamsoniana is recorded for the first time outside the Mediterranean Sea, in the Canary Islands. An identification key to all known Bathyporeia species is given.

In older literature, it has been claimed that the West Indian shrimp Lysmata intermedia also exists at Faial Island, in the Azores. It is now demonstrated here that these Azorean records of L. intermedia are actually based on L. seticaudata . Previous confusion probably arose from the very close similarity between the two species. L. intermedia is here redescribed on the basis of topotypical specimens (Dry Tortugas, Florida). It is shown that L. seticaudata displays significant geographical variations, the Atlantic specimens and particularly those of the Azores being more robust than those from the Mediterranean Sea. In L. seticaudata , the number of segments on the accessory branch of the outer antennular flagellum also increases with total body size. A synonymy and a brief account on their geographical distribution and their ecology are given for both species. Dans la litterature ancienne, la crevette caraibe Lysmata intermedia a ete signalee a l'ile de Faial, dans l'archipel des Acores. Nous montrons ici que ces signalements sont errones et resultent d'une confusion avec L. seticaudata . L'extreme similitude entre les deux especes explique aisement ces identifications anterieures incorrectes. L. intermedia est redecrite a partir de specimens de la localite-type (Dry Tortugas, Florida). Il appert que L. seticaudata presente certaines variations geographiques, les specimens atlantiques, et tout specialement ceux des Acores, etant plus robustes que ceux de la Mediterranee. Chez L. seticaudata , il ressort aussi que le nombre de segments de la branche accessoire du flagelle antennulaire externe augmente avec la taille de la crevette. Une synonymie est donnee pour les deux especes, de meme qu'un resume des informations disponibles sur leur distribution geographique et leur ecologie.

Resume Un crustace nouveau pour la faune europeenne et originaire du Pacifique Nord-Ouest, Hemigrapsus penicillatus, a ete observe pour la premiere fois en 1994 a La Rochelle (France). Ce crabe qui etend rapidement son aire de distribution est present actuellement depuis Laredo, Espagne (43°25′N, 03°20′W) jusqu'a Fromentine, France (46°53′N, 02°09′W) dans les zones abritees de la zone mediolittorale. Il est localement abondant, avec une densite atteignant 10 a 20 individus par metre carre. Sa zone d'origine comporte des regions froides (nord du Japon, sud des cotes de Russie) aussi bien que tropicales (Taiwan, Hong-Kong), si bien qu'il va probablement coloniser en peu de temps la plupart des cotes d'Europe et d'Afrique du Nord.

Examination of topotypic (Brazilian) specimens of Hippolyte obliquimanus Dana, 1852, and H. exilirostratus Dana, 1852, shows that the two species are identical and also conspecific with the West Indian H. curacaoensis Schmitt, 1924. The name obliquimanus Dana, 1852 is given precedence over exilirostratus Dana, 1852. The species is redescribed and compared to its East-Pacific counterpart H. williamsi Schmitt, 1924.

11 pages; International audience; In 2008 the BIOPEARL II expedition on board of RRS James Clark Ross sailed to the eastern Amundsen Sea Embayment and Pine Island Bay, one of the least studied Antarctic continental shelf regions due to its remoteness and ice cover. A total of 37 Agassiz trawls were deployed at depth transects along the continental and trough slopes. A total of 5469 specimens, belonging to 32 higher taxonomic groups and more than 270 species, were collected. Species richness per station varied from 1 to 55. The benthic assemblages were dominated by echinoderms and clearly different to those in the Ross, Scotia and Weddell seas. Here we present the macro- and megafaunal assemblage structure, its species richness and the presence of several undescribed species.

Eurythenes gryllus is one of the most widespread amphipod species, occurring in every ocean with a depth range covering the bathyal, abyssal and hadal zones. Previous studies, however, indicated the existence of several genetically and morphologically divergent lineages, questioning the assumption of its cosmopolitan and eurybathic distribution. For the first time, its genetic diversity was explored at the global scale (Arctic, Atlantic, Pacific and Southern oceans) by analyzing nuclear (28S rDNA) and mitochondrial (COI, 16S rDNA) sequence data using various species delimitation methods in a phylogeographic context. Nine putative species-level clades were identified within E. gryllus. A clear distinction was observed between samples collected at bathyal versus abyssal depths, with a genetic break occurring around 3,000 m. Two bathyal and two abyssal lineages showed a widespread distribution, while five other abyssal lineages each seemed to be restricted to a single ocean basin. The observed higher diversity in the abyss compared to the bathyal zone stands in contrast to the depth-differentiation hypothesis. Our results indicate that, despite the more uniform environment of the abyss and its presumed lack of obvious isolating barriers, abyssal populations might be more likely to show population differentiation and undergo speciation events than previously assumed. Potential factors influencing species’ origins and distributions, such as hydrostatic pressure, are discussed. In addition, morphological findings coincided with the molecular clades. Of all specimens available for examination, those of the bipolar bathyal clade seemed the most similar to the ‘true’ E. gryllus. We present the first molecular evidence for a bipolar distribution in a macro-benthic deep-sea organism.

Four specimens of the rare shrimp Merhippolyte ancistrota are here reported. This species, which was only known from the subtropical and southern parts of the Eastern Atlantic, is recorded for the first time off the Atlantic coast of Morocco and in the Mediterranean Sea. The morphology of the shrimps examined is compared with the specimens previously reported.

The family Bathyporeiidae was introduced without description, and later on, when its first proper description appeared, was not considered as new. Therefore, it cannot be currently considered as a valid family. These procedural irregularities are corrected herein, and the the family is described de novo, with Bathyporeia as its type genus.

Julian Gutt ... et al. -- 10 pages, 5 figures, 1 table, supplementary data https://doi.org/10.1016/j.dsr2.2010.05.024, The marine ecosystem on the eastern shelf of the Antarctic Peninsula was surveyed 5 and 12 years after the climate-induced collapse of the Larsen A and B ice shelves. An impoverished benthic fauna was discovered, that included deep-sea species presumed to be remnants from ice-covered conditions. The current structure of various ecosystem components appears to result from extremely different response rates to the change from an oligotrophic sub-ice-shelf ecosystem to a productive shelf ecosystem. Meiobenthic communities remained impoverished only inside the embayments. On local scales, macro- and mega-epibenthic diversity was generally low, with pioneer species and typical Antarctic megabenthic shelf species interspersed. Antarctic Minke whales and seals utilised the Larsen A/B area to feed on presumably newly established krill and pelagic fish biomass. Ecosystem impacts also extended well beyond the zone of ice-shelf collapse, with areas of high benthic disturbance resulting from scour by icebergs discharged from the Larsen embayments, Financial supportofANTXXIII/8 Polarstern expedition by CAML, BIANZOII, UMAC, DFGandof L.M. Gould and N.B. Palmer expeditions by NSF.Additional species identification by E.Cano (E.C.), C.DeBroyer (C.D.B.), J.-M.Gili (J.-M.G.), C.M.Lopez-Fedela Cuadra (C.M.L.), C. McClelland (C.M.), E.Rodríguez (E.R.), M.Roux (M.R.), V.Siegel, N.Teixido, H.Wägele (H.W.), helpful comments by A. Van reuse land two anonymous referees. ROV provided by MARUM/University of Bremen, oceanographic equipment by D. Gerdes.This is CAML contribution #39

Specimens of the grapsoid crabs Grapsus granulosus, Plagusia squamosa and Pachygrapsus transversus were recently collected in the Sirte Basin, on the southern rim of the Mediterranean Sea. The Erythrean alien G. granulosus is reported for the first time from the Mediterranean Sea, along with the second record in the Mediterranean of the Indo-Pacific P. squamosa, and the first record of P. transversus along the south-central Mediterranean coast. The relations between introduced grapsoid crabs, vessel traffic and climate change are dicussed.

The genus Eurythenes S.I. Smith in Scudder, 1882 was previously considered as consisting of three highly distinctive species: E. gryllus (Lichtenstein in Mandt, 1822), E. thurstoni Stoddart & Lowry, 2004 and E. obesus (Chevreux, 1905). E. gryllus has been considered as a common cosmopolitan and eurybathic species recorded down to a depth of 7800 m. However, the analysis of DNA sequences (COI, 16S, 28S) of newly collected specimens combined with GenBank sequences revealed the existence of nine genetic lineages within E. gryllus sensu lato. Specimens were recovered by tree-construction methods in distinct, well-supported clades and were separated by genetic divergences in the same range as interspecific values documented for other lysianassoid species. Furthermore, in some cases, different lineages were found at the same sampling locality. Specimens of six of the nine clades were examined directly. With one exception, these clades are separated by small but consistent morphological differences. As a consequence, five morphospecies are recognized herein within the E. gryllus complex: E. andhakarae sp. nov. (West Antarctica, abyssal), E. gryllus (bipolar, bathyal), E. magellanicus H. Milne Edwards, 1848 (Cape Horn and Brazil Basin, abyssal), E. maldoror sp. nov. (nearly cosmopolitan, abyssal), E. sigmiferus sp. nov. (at least West Atlantic, possibly nearly cosmopolitan, abyssal).

Two new lysianassoid amphipods of the genus Pseudorchomene Schellenberg, 1926 from the Southern Ocean are described: P. debroyeri sp. n. collected in baited traps deployed around the Falkland Islands, Burdwood Bank and Iles Kerguelen between 55 and 470 m, and P. lophorachis sp. n. collected in baited traps and Agassiz trawls deployed in the Scotia and Weddell Seas at depths between 847 and 1943 m. P. lophorachis sp. n. is characterized by an strongly elongated first gnathopod and by the occurrence of low posterodorsal humps on the body segments. P. debroyeri sp. n. is very similar to P. coatsi (Chilton, 1912) but exhibits slight differences of proportions in the articles of gnathopods 1 and 2, more spines on pereopods and more acute spines on the propodus of pereopods 3-7. Molecular data indicate the existence of a welldefined clade comprising P. lophorachis sp. n., P. debroyeri sp. n., P. coatsi (Chilton, 1912), Abyssorchomene plebs (Hurley, 1965) and A. rossi (Walker, 1903). On the other hand, A. plebs and A. rossi do not form a clade with A. chevreuxi (Stebbing, 1906), which is the type species of the genus Abyssorchomene De Broyer, 1984. The definition of Pseudorchomene is amended, so that it now includes P. coatsi, P. debroyeri, P. lophorachis, P. plebs and P. rossi. The triangular coxa 1 in these 5 species is unique for 'orchomenid' lysianassoids, thus considered as a putative synapomorphy. P. coatsi (Antarctic species) is morphologically extremely similar to P. debroyeri (sub-Antarctic species) but it is genetically closer to the morphologically distinct P. lophorachis (Antarctic species). Hypotheses for these recent speciations and the mor phological evolution within Pseudorchomene are discussed. The type species and the nomenclatural history of the genus Tryphosa Boeck, 1871, which is the type genus of the subfamily Tryphosinae, are discussed. Copyright © 2012 · Magnolia Press.

A new amphipod crustacean, Liljeborgia clytaemnestra sp. nov., is described based on specimens from Malta andthe Bay of Naples. It is quite similar to the sympatric L. dellavallei Stebbing, 1906, but it has narrower and moreregular-sized spines on the propodus of pereiopods 3–4. The longest spine on the dorsolateral border of the pedun-cle of uropod 1 is not strongly elongate in adult males, as in L. dellavallei. The apical spines on the lobes of the tel-son are much longer than in L. dellavallei. L. clytaemnestra sp. nov. is actually more similar to two northeasternAtlantic species, the British L. pallida (Spence Bate, 1857) and the Scandinavian L. brevicornis (Bruzelius, 1859)than to the Mediterranean L. dellavallei. In L. clytaemnestra sp. nov., article 2 of the mandibular palp has setae ondistal third, whilst setae are restricted to tip in the two other species. Article 3 of the mandibular palp is also longerin L. clytaemnestra sp. nov. than in the two Atlantic species. The spines of the outer plate of the maxilliped are lon-ger in L. clytaemnestra sp. nov. than in the two other species. The most distal spine of the propodus of pereiopods3–4 is reduced in L. clytaemnestra sp. nov. and L. brevicornis, but not in L. pallida. The serration of the posteriorborder of the basis of pereiopod 7 is much stronger in L. clytaemnestra sp. nov. than in the two other species.Finally, in L. clytaemnestra sp. nov., the spines of the lobes of the telson are longer than in L. pallida. A lectotypeis designated for L. dellavallei. The presence/absence of a posterodorsal tooth on pleonite 3 in L. dellavallei is dis-cussed. The validity of L. kinahani (Spence Bate, 1862) is questioned. An identification key is proposed for Mediterranean Liljeborgia species.