22 results
Search Results
2. The copepods associated with the coralAstroides calycularis(Scleractinia, Dendrophyllidae) in the Strait of Gibraltar
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M. E. Bandera, Mercedes Conradi, and Pablo J. López-González
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Cnidaria ,Astroides calycularis ,Siphonostomatoida ,food.ingredient ,biology ,Ecology ,Coral ,Fauna ,Scleractinia ,Hermatypic coral ,Poecilostomatoida ,biology.organism_classification ,food ,Ecology, Evolution, Behavior and Systematics - Abstract
This paper describes and provides new records of the copepods hosted by the ahermatypic scleractinian Astroides calycularis (Pallas, 1766). This coral species is endemic to the Mediterranean Sea and protected by the Convention on International Trade in Endangered Species of Wild Flora and Fauna (CITES). The coral colonies were collected at both sides of the Strait of Gibraltar. Two new species, the poecilostomatoid Doridicola helmuti and the siphonostomatoid, Asterocheres astroidicola, are described and compared with their congeners. Furthermore, this paper represents the first record of the genus Doridicola associated with a scleractinian coral, the first time that Acontiophorus scutatus is found associated with Cnidaria, and the first report of an Asterocheres species living on scleractinian corals from the European coasts.
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- 2006
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3. Description of a new species ofHaminoea(Gastropoda: Cephalaspidea) from India, with an account of the diversity of the genus in the Indo-West Pacific
- Author
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Appukuttannair Biju Kumar, Trond Roger Oskars, Manuel António E. Malaquias, Raveendhiran Ravinesh, Sumantha Narayana, and Monisha Bharate
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0106 biological sciences ,0301 basic medicine ,biology ,Ecology ,government.political_district ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,03 medical and health sciences ,Indian ocean ,030104 developmental biology ,Geography ,Haminoea ,Lakshadweep ,Gastropoda ,government ,Taxonomy (biology) ,Heterobranchia ,Mollusca ,Cephalaspidea ,Ecology, Evolution, Behavior and Systematics - Abstract
In this paper current knowledge on the diversity of the gastropod cephalaspidean genus Haminoea from India is revised. A comprehensive literature review was undertaken and novel specimens were coll...
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- 2018
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4. Aedesmosquitoes in the Republic of the Sudan, with dichotomous keys for the adult and larval stages
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Rasha S. Azrag, Ralph E. Harbach, K. M. Ibrahim, R. Guy Reeves, Meshkat A. AhmedMohmed, Alaa M. Ali, and Asia H. Mohamed
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0106 biological sciences ,Aedes ,Larva ,Insecta ,Arthropoda ,biology ,Ecology ,Diptera ,030231 tropical medicine ,Biodiversity ,biology.organism_classification ,Ochlerotatus caspius ,01 natural sciences ,The Republic ,010602 entomology ,03 medical and health sciences ,Culicidae ,0302 clinical medicine ,Anopheles Genus ,Capital city ,Animalia ,Socioeconomics ,Ecology, Evolution, Behavior and Systematics ,Taxonomy ,Aedes vexans - Abstract
Descriptions of the mosquitoes of the Republic of the Sudan are mostly limited to works published more than 60 years ago. Khartoum State in central Sudan, which encompasses the capital city, has experienced many outbreaks of diseases caused by mosquito-borne pathogens, including Rift Valley fever. In this paper we focus on the composition of Aedes mosquitoes in high-risk areas in and around major agricultural projects. This is based on longitudinal surveillance of adults and larvae during the hot dry and rainy seasons in 2013. A total of 630 adult female mosquitoes were collected. Anopheles mosquitoes were the most abundant (n = 456, 72.4), followed by Culex (n = 96, 15.2) and Aedes (n = 78, 12.4). Only three Aedes species were identified: Aedes caballus (n = 38, 48.7 of the Aedes), Aedes vexans arabiensis (n = 30, 38.5) and Aedes caspius (n = 10, 12.8). A total of 42,549 larvae were collected. Aedes larvae were the most abundant (n = 30,936, 72.7), followed by Culex (n = 9656, 22.7) and Anopheles (n = 1957, 4.6). The Aedes larvae included Ae. caspius (n = 21,957, 71.0 of the Aedes), Ae. vexans arabiensis (n = 5577, 18.0), Aedes quasiunivittatus (n = 107, 0.3), Aedes dentatus (Theobald) (n = 204, 0.7) and 3091 unidentifiable larvae (10.0), denoted as Forms X, Y and Z. We discuss the bionomics of the four identified species of Aedes and provide updated keys for the identification of the mosquito genera and the larvae and adults of the Aedes species recorded from the Republic of the Sudan. © 2017 Informa UK Limited, trading as Taylor Francis Group.
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- 2017
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5. Biodiversity of the scentless plant bugs (Hemiptera: Rhopalidae) in southern South America
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María Cecilia Melo and Sara Itzel Montemayor Borsinger
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0106 biological sciences ,JADERA ,HARMOSTES ,biology ,Ecology ,Otras Ciencias Biológicas ,010607 zoology ,Biodiversity ,LIORHYSSUS ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Hemiptera ,ARHYSSUS ,Ciencias Biológicas ,Liorhyssus ,Jadera ,NIESTHREA ,CIENCIAS NATURALES Y EXACTAS ,Ecology, Evolution, Behavior and Systematics ,Rhopalidae ,XENOGENUS - Abstract
This paper provides a comprehensive faunal survey of the Rhopalidae from southern South America with emphasis on the fauna of Argentina, based on published and unpublished data. The biodiversity from Argentina comprises 38 recorded species from six genera: Arhyssus Stål 1870 (one species), Liorhyssus Stål 1870 (two species), Niesthrea Spinola 1837 (five species), Xenogenus Berg 1883 (two species), Harmostes Burmeister 1835 (20 species), and Jadera Stål 1862 (eight species). We established accurate distributions for most of the species and report new distributional information for 27 of them. Most of these records are from Argentinean provinces, but we also report five new country records: three from Argentina – Harmostes (Harmostes) splendens Harris 1944, H. (Neoharmostes) bergi Göllner-Scheiding 1998 and Arhyssus tricostatus (Spinola 1852); one from Brazil – Xenogenus picturatum Berg 1883; and one from Paraguay – Harmostes (Harmostes) gravidator (Fabricius 1794). Fil: Melo, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina Fil: Montemayor Borsinger, Sara Itzel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina
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- 2015
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6. Description ofOrthadenella coulsonisp. nov. (Acari: Mesostigmata: Melicharidae) from Siberia with a key to the females ofOrthadenella
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Irina I. Marchenko, Ewa Teodorowicz, and Dariusz J. Gwiazdowicz
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LSID ,biology ,Ecology ,Genus ,Mite ,Zoology ,Key (lock) ,Taxonomy (biology) ,Acari ,Mesostigmata ,biology.organism_classification ,Ascidae ,Ecology, Evolution, Behavior and Systematics - Abstract
This paper presents both the description and the iconographic documentation of a mite species new to science: Orthadenella coulsoni sp. nov., recorded from Siberia, Russia. A key for determining females of all species within this genus is included.http://zoobank.org/urn:lsid:zoobank.org:pub:3B416529-A22D-43B3-96BD-3D5A8ED4F0F1
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- 2014
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7. New genera and species of Urothoidae (Amphipoda) from the Brazilian deep sea, with the re-assignment ofPseudurothoeandUrothopsisto Phoxocephalopsidae
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Daniela J.P. Sittrop, Jesser F. Souza-Filho, Cristiana S. Serejo, and André R. Senna
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Taxon ,Amphipoda ,biology ,Urothoidae ,Ecology ,Lower lip ,Identification key ,Zoology ,Seta ,biology.organism_classification ,Deep sea ,Mandibular molar ,Ecology, Evolution, Behavior and Systematics - Abstract
Box-corer samples taken between 700 and 2000 m depth on the slope of the Campos Basin, southeastern Brazilian deep sea, provided the material for the description of two new genera in the family Urothoidae, Carangolioides gen. nov. and Coronaurothoe gen. nov., and three new species: Carangolioides castellatus sp. nov., Carangolioides hamatus sp. nov. and Coronaurothoe rotunda sp. nov. Carangolioides gen. nov. differs from other urothoid genera by the presence of a distolateral projection on the outer lobes of the lower lip and the distally truncated margin of the upper lip, while Coronaurothoe gen. nov. differs by the mandibular molar being triturative with a distal crown of stout setae. In this study, we provide detailed descriptions and illustrations of the new taxa. An identification key to genera of Urothoidae is also provided. The genera Pseudurothoe Ledoyer, 1986 and Urothopsis Ledoyer, 1967 are removed in this paper from Urothoidae to Phoxocephalopsidae.http://zoobank.org/urn:lsid:zoobank.org:pub:18...
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- 2014
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8. East–west differentiation in theMarcusenius macrolepidotusspecies complex in Southern Africa: the description of a new species for the lower Cunene River, Namibia (Teleostei: Mormyridae)
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Bernd Kramer and Michael Wink
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Mormyridae ,Systematics ,Morphometrics ,Teleostei ,Species complex ,Actinopterygii ,biology ,Ecology ,Range (biology) ,Allopatric speciation ,Zoology ,Biodiversity ,biology.organism_classification ,590 Tiere (Zoologie) ,Sister group ,Animalia ,570 Biowissenschaften, Biologie ,ddc:590 ,ddc:570 ,Chordata ,Osteoglossiformes ,systematics, morphometrics, electric organ discharges, molecular genetics, allopatric speciation ,Ecology, Evolution, Behavior and Systematics ,Taxonomy - Abstract
This paper critically compares the Southern African bulldog fish species Marcusenius macrolepidotus (Peters, 1852), inhabiting the eastern Lower Zambezi River, and Marcusenius altisambesi Kramer et al., 2007, inhabiting the central Upper Zambezi River, with bulldog fish samples from the western lower Cunene River, a 2600-km range from the Indian Ocean to the Atlantic. The three species or forms are well differentiated in morphology and molecular genetics, and differentiation is also present in electric organ discharges. Marcusenius altisambesi and the Cunene sample, which we recognize as Marcusenius multisquamatus sp. nov., are closely related and form a sister taxon to M. macrolepidotus. This result is based on the analysis of mitochondrial cytochrome b sequences and genomic Inter-simple-sequence-repeat fingerprinting. Morphological adaptations to life in a torrential escarpment river seem to be present in M. multisquamatus sp. nov. when compared with M. altisambesi, which lives in a reservoir river that periodically floods the savannah. http://www.zoobank.org/urn:lsid:zoobank.org:pub:8FE68494-9ED9-428E-B181-E814D25493F2
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- 2013
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9. Revision of thehirsuticornis‐like species ofMacrothrixBaird, 1843 (Cladocera: Anomopoda: Macrothricidae) from Subantarctic and temperate regions of the southern hemisphere
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Alexey A. Kotov
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Systematics ,geography ,geography.geographical_feature_category ,biology ,Ecology ,Anomopoda ,biology.organism_classification ,Taxon ,Peninsula ,Cape ,Archipelago ,Temperate climate ,Southern Hemisphere ,Ecology, Evolution, Behavior and Systematics - Abstract
The aim of this paper is to revise populations of Macrothrix cf. hirsuticornis (Cladocera: Anomopoda: Macrothricidae) from different regions of the southern hemisphere. It is demonstrated that M. hirsuticornis Norman and Brady, 1867 s. str. is absent there, and five related species occupy different Subantarctic islands and the southernmost portions of South America, and Africa. Macrothrix boergeni Studer, 1878 from the Kerguelen Archipelago is redescribed and a neotype is selected. All populations in the southernmost portion of continental South America, Tierra del Fuego, Falklands, South Georgia, South Orkney Islands, and on the Antarctic Peninsula belong to M. oviformis Ekman, 1900. All the taxa described from this region—M. ciliata Vavra, 1900, M. odontocephala Daday, 1902, M. propinqua Sars, 1909, and, probably, M. inflata Daday, 1902—are junior synonyms of M. oviformis. Two new species are established: M. sarsi sp. nov. from the Cape region of South Africa and M. ruehei sp. nov. from Crozet, Marion i...
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- 2007
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10. Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species ofDjeziraia(Polycystididae, Kalyptorhynchia)
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Cristina Damborenea, Carolina Noreña, Francisco Brusa, and Anno Faubel
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geography ,geography.geographical_feature_category ,Brackish water ,Ecology ,Fauna ,Species diversity ,Estuary ,Ecotone ,Biology ,biology.organism_classification ,Turbellaria ,Habitat ,Genus ,Ecology, Evolution, Behavior and Systematics - Abstract
From 1997 to 1999, the fauna of free‐living Platyhelminthes of the rias ecosystem was studied along the Galician and Cantabrian coast in northern Spain. In total, 72 platyhelminth species are listed in this study. Forty‐two species represent new records for the Iberian Peninsula, three of which represent new genera records. A new species belonging to the genus Djeziraia (Polycystididae, Kalyptorhynchia), Djeziraia longistyla sp. nov., is described in this paper. In this broad‐scale study, a large data set (27 localities) of the estuaries of northern Spain allowed an analysis of the turbellarian species assemblages and the relation of species distributions to salinity, conductivity, oxygen, temperature, and sediment characteristics. Species assemblages (species diversity) of each habitat of the brackish water ecotone are shown. The present study contributes to knowledge on the ability of adaptation of free‐living Platyhelminthes to regimes of brackish water ecotones.
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- 2007
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11. A review of species diversity and distribution ofCulicoidesLatreille, 1809 (Diptera: Ceratopogonidae) in Turkey
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Sükran Yağci, Bilal Dik, and Yvonne-Marie Linton
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Mediterranean climate ,Ceratopogonidae ,biology ,business.industry ,Ecology ,Fauna ,Black sea region ,Culicoides cataneii ,Distribution (economics) ,Zoology ,Species diversity ,biology.organism_classification ,Culicoides ,business ,Ecology, Evolution, Behavior and Systematics - Abstract
This paper reviews the species composition and distribution of Culicoides biting midges in Turkey for the first time. The Culicoides fauna of Turkey is diverse, with 57 reported species collected in 54 localities across the Marmara, Aegean, Mediterranean, and Central, Eastern and Southeastern Anatolian Regions of Turkey. No records are available for the Black Sea Region. The most widespread species include Culicoides cataneii Clastrier, C. circumscriptus Kieffer, C. festivipennis Kieffer, C. gejgelensis Dzhafarov, C. longipennis Khalaf, C. maritimus Kieffer, C. nubeculosus (Meigen), C. obsoletus (Meigen), C. odiatus Austen, C. pulicaris (Linnaeus), C. puncticollis (Becker), C. saevus Kieffer, and C. shaklawensis Khalaf, whereas C. denisoni Boorman, C. dewulfi Goetghebuer, C. fagineus Edwards, C. minutissmus (Zetterstedt), C. montanus Schakirzjanova, C. semimaculatus Clastrier, C. slovacus Orszagh, and C. turanicus Gutsevich and Smatov are represented from only one locality. Only single specimens represent...
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- 2006
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12. A checklist of Tetrigoidea (Orthoptera) from Zuojiang Area, southwestern Guangxi, China, with the description of two new species
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Zhe-Min Zheng and G.‐F. Jiang
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Nature reserve ,Ecology ,Euparatettix ,Orthoptera ,Taxonomy (biology) ,Coptotettix ,Biology ,China ,biology.organism_classification ,Tetrigidae ,Ecology, Evolution, Behavior and Systematics ,Checklist - Abstract
In this paper we provide checklist of 26 species of Tetrigoidea ground grasshoppers (Scelimenidae, Metrodoridae and Tetrigidae) from the Zuojiang Area, a natural reserve located near Nanning City in the southwestern Guangxi Zhuang Autonomous Region of southwestern China. In addition, two new species: Coptotettix zaujiangensis sp. nov. and Euparatettix obliqucosta sp. nov. of Tetrigidae are described. Type specimens are deposited at the Institute of Zoology, Shaanxi Normal University, and College of Life Sciences, Nanjing Normal University.
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- 2006
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13. Further Indo‐West Pacific palaemonoid shrimps (Crustacea: Decapoda: Palaemonoidea), principally from the New Caledonian region
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Xinzheng Li and A. J. Bruce
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Species complex ,Gnathophyllidae ,biology ,Genus ,Ecology ,Periclimenes ,Zoology ,Palaemonoidea ,Chela ,biology.organism_classification ,Palaemonidae ,Ecology, Evolution, Behavior and Systematics ,Telson - Abstract
Based on the material deposited in the Museum national d'Histoire naturelle, Paris, collected from the Indo-West Pacific, principally from the New Caledonian region, the present paper reports 117 palaemonoid shrimp species, which belong, respectively, to Anchistioididae ( one genus, one species), Gnathophyllidae ( one genus, one species), Palaemonidae Palaemoninae ( seven genera, nine species), and Palaemonidae Pontoniinae ( 30 genera, 106 species), including eight new species. The new species are all Pontoniinae: Mesopontonia brevicarpalis sp. nov., Palaemonella komaii sp. nov., Periclimenes crosnieri sp. nov., Periclimenes forgesi sp. nov., Periclimenes loyautensis sp. nov., Periclimenes paralcocki sp. nov., Periclimenes paraleator sp. nov., and Periclimenes pseudalcocki sp. nov. The last six new species are members of the deep-water "Periclimenes alcocki species complex'', which has more than two ( usually four) pairs of dorsolateral telson spines anterior to the posterior telson margin, the cornea is usually reduced, the dactyl of the major second chela is generally flanged and the chela is sometimes covered with small tubercles. The complex is usually found at more than 200m depth in the West Pacific. The species can be distinguished from each other by the armature of ambulatory propod and dactyl, diameter of cornea, rostrum shape and the number of pairs of dorsolateral telson spines. Mesopontonia brevicarpalis sp. nov., from the southeast coast of Africa, is the seventh species of the genus. Palaemonella komaii sp. nov. is very similar to Palaemonella dolichodactylus Bruce, 1991 and Palaemonella hachijo Okuno, 1999. These three species share the features of very long and slender ambulatory pereiopods with the dactyl more than eight times longer than its basal depth and with several long setae on the dorsal dactylar margin.
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- 2006
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14. Species diversity of the genusPhorticaSchiner in Yunnan, China, with descriptions of nine new species (Diptera, Drosophildae)
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Shuo-Yang Wen, Jian-Jun Gao, and Hong‐Wei Chen
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Genus ,Ecology ,Botany ,Species diversity ,Key (lock) ,Biology ,Longipenis ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics - Abstract
This paper deals with a total of 29 species of the genus Phortica from Yunnan, including nine new species: acongruens (Zhang and Shi), bicornuta (Chen and Toda), bipartita (Toda and Peng), biprotrusa (Chen and Toda), cardua (Okada), eugamma (Toda and Peng), excrescentiosa (Toda and Peng), flexuosa (Zhang and Gan), gamma (Toda and Peng), hani (Zhang and Shi), lambda (Toda and Peng), omega (Okada), protrusa (Zhang and Shi), pseudogigas (Zhang and Gan), pseudopi (Toda and Peng), pseudotau (Toda and Peng), saeta (Zhang and Gan), speculum (Maca and Lin), subradiata (Okada), tau (Toda and Peng), glabtabula Chen and Gao, sp. nov., latipenis Chen and Gao, sp. nov., longipenis Chen and Gao, sp. nov., pangi Chen and Wen, sp. nov., sagittaristula Chen and Wen, sp. nov., saltiaristula Chen and Wen, sp. nov., setitabula Chen and Gao, sp. nov., uncinata Chen and Gao, sp. nov., and unipetala Chen and Wen, sp. nov. A key to all species examined of the genus Phortica from Yunnan, China, is provided.
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- 2005
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15. The pholcid spiders from Sri Lanka: redescription ofPholcus ceylonicusand description of a new genus (Araneae: Pholcidae)
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Bernhard A. Huber and Suresh P. Benjamin
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Taxon ,Modisimus culicinus ,Ecology ,Pholcidae ,Fauna ,Biodiversity ,Zoology ,Taxonomy (biology) ,Pholcus ,Biology ,Sri lanka ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics - Abstract
The pholcid spiders of Sri Lanka have never been revised in any detail. Most species previously known from the island are widespread synanthropics. However, recent collecting has revealed a rich native fauna, with new taxa at species and genus levels. In this paper we redescribe Pholcus ceylonicus O. Pickard-Cambridge, 1869, present the first record of Modisimus culicinus (Simon, 1893) for Sri Lanka, and describe two new species of a new genus, Wanniyala agrabopath n. sp. and Wanniyala hakgala n. sp. Both new species appear to be restricted to relatively undisturbed forests, where they inhabit the leaf-litter. Several new Sri Lankan species tentatively assigned to Belisana Thorell will be described in a forthcoming revision of that genus. These studies suggest that a rich pholcid fauna may await discovery in Sri Lanka.
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- 2005
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16. Freshwater sponges of the West Indies: Discovery of Spongillidae (Haplosclerida, Spongillina) from Cuba with biogeographic notes and a checklist for the Caribbean area
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Renata Manconi and Roberto Pronzato
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Spongillida ,Mesoamerica ,biology ,Ecology ,Biogeography ,Biodiversity ,Zoology ,Spongillidae ,biology.organism_classification ,Porifera ,Haplosclerida ,Habitat ,Nearctic ecozone ,Animalia ,Demospongiae ,Species richness ,Ecology, Evolution, Behavior and Systematics ,Taxonomy - Abstract
The paper reports the first finding of freshwater sponges from the Greater Antilles. Spongillidae belonging to four species of the genera Ephydatia, Anheteromeyenia, and Radiospongilla were found in a variety of freshwater habitats in western Cuba. Anheteromeyenia cheguevarai nov. sp. is described. Morphological traits of sponges from West Cuba were characterized by light microscopy and scanning electron microscopy and compared to the spongillofauna of the Nearctic and Neotropical regions and the pan‐Caribbean area. The specific richness and the discovery of a new species suggest a high diversity of the Antillean freshwater sponges although the investigated area of Cuba is relatively small.
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- 2005
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17. Revision of the genusNiwaellain China (Pisces, Cobitidae), with description of two new species
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Yifeng Chen and Yongxia Chen
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Cobitidae ,Barbel ,biology ,Cobitis ,Ecology ,Fish fin ,Zoology ,East Asia ,Taxonomy (biology) ,China ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Black spot - Abstract
Loaches of the genus Niwaella, family Cobitidae, are distributed only in East Asia. At present only in Japan and South Korea have fishes of the genus Niwaella been found. Herein we revise the genus Niwaella in China. Son and He ( 2001) transferred the species Cobitis laterimaculata to the genus Niwaella, but their specimens were not N. laterimaculata, but a new species, N. longibarba sp. n., collected from Cao'ejiang River, Huangzezhen, Chengxian County, Zhejiang Province. The new species is distinguished from N. laterimaculata by its colour pattern of a row of slightly large, and long, scattered dark brown vertical bars on the dorsolateral surface, two or three striations on the caudal fin, and long barbels and undeveloped mental lobes. In this paper we also describe another new species, N. xinjiangensis sp. n., collected from Xinjiang River, Guangfeng County, Jiangxi Province, May 1990, with diagnostic colour pattern of 17 - 20 large and long, dark brown vertical bars on the dorsolateral surface, a dark stripe or rounded black spots along the lateral midline and some blotches below the lateral midline; it is a large-sized species, with shorter barbels, and longer caudal peduncle. Thus five species of the genus Niwaella are known, three are endemic to eastern China and two are endemic to either Japan or South Korea.
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- 2005
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18. Intraspecific clinal variation in Plagiodontes patagonicus (Gastropoda: Orthalicidae, Odontostominae), an endemic species from Argentina
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Néstor J. Cazzaniga, Natalia S. Ghezzi, and Julia Pizá
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biology ,Ecology ,Orthalicidae ,Zoology ,Biodiversity ,Zoología, Ornitología, Entomología, Etología ,Cline (biology) ,TAXONOMY ,Subspecies ,biology.organism_classification ,PLAGIODONTES PATAGONICUS ,Intraspecific competition ,CLINE ,GENITAL ANATOMY ,Ciencias Biológicas ,GEOGRAPHICAL VARIATION ,MORPHOMETRY ,Gastropoda ,Principal component analysis ,Taxonomy (biology) ,Endemism ,CIENCIAS NATURALES Y EXACTAS ,Ecology, Evolution, Behavior and Systematics ,Taxonomy - Abstract
Plagiodontes patagonicus (d'Orbigny, 1835) is a quite variable species endemic to southern Buenos Aires province (Argentina). Its taxonomic characterization did not include any quantitative analysis of variability for an accurate discrimination, and the extremes of its variation were described as different subspecies or species. In this paper, shell measurements and angles, and quantitative data on the terminal male genitalia were studied by Principal Component Analysis and Varimax multivariate analysis. Typical Plagiodontes patagonicus and the largest form known as P. patagonicus magnus Hylton-Scott, 1951 showed an almost continuous pattern of shell variation, which is positively correlated with the altitude gradient over their geographical range, which in turn is correlated with a rainfall gradient, i.e. they constitute a size-form cline that does not allow objective delimitation of different morphospecies. Data from the genital system were also arranged as a geographical gradient within the P. patagonicus patagonicus-P. patagonicus magnus continuum. The variability of protoconch sculpture and apertural teeth also indicate recognition of them as a single taxon. Fil: Cazzaniga, Néstor Jorge. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Piza, Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Ghezzi, Natalia S.. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
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- 2005
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19. Redescription of the megalopa of the fiddler crabUca uruguayensis(Decapoda, Brachyura, Ocypodidae) with special emphasis on its setae
- Author
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Laura Cecilia Armendáriz
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Appendage ,education.field_of_study ,biology ,Ocypodidae ,Ecology ,Population ,Seta ,biology.organism_classification ,Fiddler crab ,Genus ,Carapace ,education ,Ecology, Evolution, Behavior and Systematics ,Telson - Abstract
The megalopa stage of the fiddler crab endemic to the Neotropical region, Uca uruguayensis, is redescribed, measured and illustrated from 216 specimens collected at Channel 1, Samborombon Bay, Argentina, the southernmost permanent population of the species. Special attention is given to the description of the types of setae, which are compared to those cited for U. uruguayensis and other fiddler crab megalopae reared in the laboratory. The differences are given in the outline of the carapace, the plumose spines of the telson, and also in the following appendages: antennule, antenna, mandible, maxillule, maxilla, first, second and third maxillipeds. These cited differences could be due to: the origin of the organisms, caught in the field from their settlement area versus reared in the laboratory, and/or the sampling locality. The purpose of the present paper is to provide a detailed description of the megalopa that may allow resolution of taxonomic and phylogenetic relationships within this complex genus.
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- 2005
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20. Endemic freshwater planarians of Sardinia: Redescription ofDugesia hepta(Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus
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Renata Manconi, Salvatore Casu, G Corso, Maria Pala, and Giacinta Angela Stocchino
- Subjects
Mediterranean climate ,biology ,Ecology ,Dugesia hepta ,Zoology ,Dugesiidae ,biology.organism_classification ,Ejaculatory duct ,Geographic distribution ,medicine.anatomical_structure ,medicine ,Taxonomy (biology) ,Tricladida ,Dugesia ,Ecology, Evolution, Behavior and Systematics - Abstract
The endemic freshwater planarian Dugesia hepta from Sardinia was described mainly by karyology and karyotype analysis and by geographic distribution. The present paper reports on the detailed morphological study of the copulatory apparatus and highlights the fact that the exclusive diagnostic characters of D. hepta are the shape of the penis papilla, the course and opening of the ejaculatory duct and the openings of the shell glands. A neotype is designated on the basis of a detailed description, and the geographic range of the species is better defined. The two phylogenetically important traits represented by the course and opening of the ejaculatory duct show an unknown condition in the genus Dugesia, diverging from the typical one displayed by the other 69 species. A comparative analysis of morphological traits of the 20 Mediterranean species of the genus Dugesia was made.
- Published
- 2005
- Full Text
- View/download PDF
21. Taxonomic revision and systematic notes on someHaleciumspecies (Cnidaria, Hydrozoa)
- Author
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Peter Schuchert
- Subjects
Cnidaria ,Mediterranean climate ,biology ,Species level ,Genus ,Halecium beanii ,Ecology ,Rare species ,Halecium ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Hydrozoa - Abstract
Although the genus Halecium is easy to recognize, identifications at the species level are often difficult, this even for quite common and supposedly well-known species of the north-eastern Atlantic. This paper revises and re-describes some Halecium species which resemble each other closely and which are not easy to distinguish. Additional information on a few rare species is also provided. The study is based on material collected from the North Atlantic, Mediterranean, South Africa, and New Zealand. Halecium scutum Clark, 1877 is recognized as a valid species and distinct from both H. beanii and H. halecinum; colony form and microscopic characters allow a distinction. The pinnate colony form of H. halecinum is a characteristic trait, but not all colonies show this growth form. Halecium beanii can occur in monosiphonic and polysiphonic colonies. Monosiphonic colonies of H. beanii have probably been misidentified by some authors as H. lankesterii. The differences of H. lankesteri to H. beanii and H. petrosum are discussed. The South African population of the reportedly cosmopolitan H. beanii has distinct gonothecae and could belong to a separate species. The Mediterranean Halecium mediterraneum is hardly distinguishable from the New Zealandic H. delicatulum, but it is kept separate mainly for biogeographic reasons. The rare Mediterranean Halecium banyulense is redescribed based on a second find from Naples. The male gonothecae of Halecium corrugatissimum are described for the first time.
- Published
- 2005
- Full Text
- View/download PDF
22. Biodiversity of marine planarians revisited (Platyhelminthes, Tricladida, Maricola)
- Author
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Masaharu Kawakatsu, Ronald Sluys, and Systematische en Geografische Dierkunde (inactive) (IBED, FNWI)
- Subjects
Cercyridae ,biology ,Ecology ,Procerodes ,Biogeography ,Uteriporidae ,Biodiversity ,Zoology ,biology.organism_classification ,Planarian ,Procerodidae ,Animalia ,Taxonomy (biology) ,Platyhelminthes ,Species richness ,Tricladida ,Ecology, Evolution, Behavior and Systematics ,Taxonomy ,Maricola - Abstract
An account is given of new distributional records and the taxonomy of nine species of marine triclad, including the description of two new species. After more than 100 years of uncertainty, the paper resolves the taxonomic status of the enigmatic nominal species Procerodes solowetzkianus Sabussow, 1900. The study concludes with a biogeographic analysis of all species of marine planarian by documenting patterns of species richness on an equal area grid map of the world.
- Published
- 2005
- Full Text
- View/download PDF
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