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| Registros recuperados: 36 | |
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| Thatcher,Vernon E.; Oliveira,Antonio A. N. de; Garcia,Adriana M.. |
| Specimens of a cymothoid isopod from a freshwater fish of Minas Gerais State were studied. These were found to be morphologically comparable to Philostomella cigarra Szidat & Schubart, 1960, except for having multilaminate pleopods which is the distinguishing characteristic of the genus Braga Schiödte & Meinert, 1881. The first pleopod is bilaminate while the second is quadrilaminate. Pleopods three to five are trilaminate. It is herein proposed that the generic name Philostomella Szidat & Schubart, 1960, should be considered invalid and that the species P. cigarra should be transferred to Braga. Braga now contains eight species, including B. cigarra comb. nov., all from South American freshwater fishes. The principal difference... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cymothoid; Freshwater fish parasite; South America. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100021 |
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| Thatcher,Vernon E.; Brasil-Sato,Marilia C.. |
| Ergasilus salmini sp. nov. a branchial parasite of the "dourado", Salminus franciscanus Lima & Britski, 2007, from the upper São Francisco river, Minas Gerais State, Brazil, is described based on female specimens. The new species has a serrate, curved seta on the first exopod as do most of the known South American species of the genus. Other than that, it does not closely resemble any known species of this genus. Many of the known ergasilids have head, and first two thoracic segments completely fused to form a cephalothorax. In the new species, the head is incompletely fused, the first thoracic segment is fused, but thoracic segment two is free. Ergasilus hydrolycus Thatcher, Boeger & Robertson, 1984, also has a free second thoracic segment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepod parasite; Crustacean parasite; Freshwater fish; São Francisco River Basin; South America. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300023 |
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| Lima,José T. A. X. de; Chellappa,Sathyabama; Thatcher,Vernon E.. |
| Entre Isopodas Crustaceas existem ectoparasitos que são de fácil observação devido ao seu tamanho. Eles causam lesões mecânicas no hospedeiro que podem resultar em morte. Este trabalho verificou a existência de parasitismo por isópodos no peixe serra, Scomberomorus brasiliensis (Collette, Russo & Zavala-Camin, 1978) das águas costeiras do Rio Grande do Norte, Brasil. Os índices de infestação parasitária dos isópodos foram calculados e relacionados com o tamanho, peso e o estado gonadal do hospedeiro. Livoneca redmanni (Leach, 1818) (Cymothoidae) e Rocinela signata (Schioedte & Meinert, 1879) (Aegidae) foram registradas pela primeira vez nas águas costeiras do Rio Grande do Norte. Os locais de fixação de L. redmanni no hospedeiro foram a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Câmara branquial; Cavidade bucal; Isopodas marinhos; Parasitos; Infestação parasitária. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400041 |
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| Thatcher,Vernon E.; Pereira Júnior,Joaber. |
| Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae) a parasite of the flounder, Paralichthys orbignyanus (Valenciennes, 1839), is described. The new genus has a spherical head a post-mandibular "neck" and two pairs of modified biramous legs. In these respects, it resembles Argentinochondria patagonensis Etchegoin, Timi & Sardella, 2003. In the Argentine genus, however, the bulbous head has a medial constriction and the posterior of the female lacks the lateral extensions that are present in the new genus. Pseudolernentoma brasiliensis Luque & Alves, 2003, also resembles the new genus but it lacks the lateral extensions of the trunk and the latter is cylindrical rather than flat. The second leg of the new genus is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepod parasite; Chondracanthid; Southern Brasil; South Atlantic. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300014 |
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| Thatcher,Vernon E.; Fonseca,Francinete T.. |
| Cymothoa recifea sp. nov. (Isopoda, Cymothoidae) is described from the mouths of Centropomus undecimalis (Bloch, 1792) and Oligoplites palometa (Cuvier, 1832). The fish hosts were caught near Itamaracá and Cabo de Santo Agostinho, State of Pernambuco, Brazil. The new species bears a superficial resemblance to Cymothoa oestrum (Linnaeus, 1793) from which it differs in a number of important respects. In the new species, the basal carinae are large on pereopods 4-7 and usually pointed, whereas in C. oestrum the carinae are small on pereopods 4-6, large on 7 and not pointed. In the new species, only pleopod 1 is simple and 2-5 are provided with pockets and folds. In the other species, pleopods 1-4 are simple and only 5 has folds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Ocean; Isopod parasite; Parasitic crustacean. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000300001 |
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| Thatcher,Vernon E.; Huergo,Giuliano M.. |
| Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Cyclopoida, Lernaeidae) a parasite of the freshwater fishes, Astyanax spp. and Corydoras ehrhardti Regan, 1912 of Santa Catarina and Paraná States, Brazil, is described, based on 10 postmetamorphic females. The new genus and species has the following characteristics that distinguish it from all other known lernaeids: (1) The body is very small (3.4-5.8 mm in length); (2) The head is provided anteriorly with six lobes and posteriorly with four undivided anchor arms. (3) The first pair of thoracopods is on the head, 2-4 are all on the "neck"; (4) Thoracopod 5 is reduced to a simple papillus near the genital pores; (5) The genital pores are equatorial in the hindbody and there is no pre-genital... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax; Copepod parasite; Corydoras; Southern Brazil. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400001 |
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| Velez,Imelda; Thatcher,Vernon E.. |
| Velez, I. & V.E. Thatcher: Five species of Lecithodendriidae (Trematoda) in bats from Colombia, including three new genera. Three new neotropical genera and species of Lecithodendriidae (Trematoda) are described from Colombian bats. Sturniratrema umbilicata gen. et sp. nov. from Sturnira lilium differs from other genera in having an oval ventral depression, a dorso-ventrally curved cirrus and a genital pore lateral to the acetabulum. Chiropterotrema antioquiense gen. et sp. nov. from Carollia perspicillata is distinguished by having the acetabulum within a triangular ventral pit as well as an separation between the the male and female genital pores. Topsiturvitrema verticalia gen. et sp. nov. from Carollia perspicillata has a different orientation... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1990 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751990000200015 |
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| Thatcher,Vernon E.; Silva,Jayme de Loyola e; Jost,Glauco F.; Souza-Conceição,José M.. |
| Cymothoa catarinensis sp. nov. collected at Camboriú, Santa Catarina State, Brazil is described. The new species is of small size, has a cephalon that is little immersed in pereonite 1, anterolateral angles of pereonite 1 that reach or surpass the eyes and a pleon that is deeply immersed in pereonite 7. The pleopods of the new species have small, lobular accessory gills projecting from the bases. Cymothoa excisa Perty, 1830, and Cymothoa oestrum (Linnaeus, 1758) are redescribed. Both are of large size (25-35 mm in length). C. excisa has pointed anterolateral margins of pereonite 1 that reach or surpass the eyes. This species also has trilaminate pleopods in the female and bilaminate pleopods in the male. C. oestrum has rounded anterolateral margins of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Ocean; Brazil; Fish parasites; Marine isopods. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300028 |
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| Thatcher,Vernon E.; Souza-Conceição,José M.; Jost,Glauco Fernando. |
| Lironeca desterroensis sp. nov. (Isopoda, Cymothoidae) is described on the basis of 105 females and three males taken from the gill chambers of the marine fish, Cetengraulis edentulus (Cuvier,1829), obtained near Santa Catarina Island, Brazil. The new species resembles Lironeca redmanni Leach, 1818, in size and general appearance but differs from that species in a number of important respects. In the new species, the pleotelson is larger, the pleonites are laterally produced, the uropods have elongate and slender rami and the larval stage (Pullus II) has a prominent frontal projection. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Cymothoid; Fish parasite; Gill parasite; Isopod parasite; Marine isopod. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200013 |
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| Thatcher,Vernon E.; Pereira Júnior,Joaber. |
| Kroyeria brasiliense sp. nov. from the shark, Galeorhinus vitaminicus de Buen, 1950, from Rio Grande do Sul, State, Brazil, is described on the basis of 14 adult females. The new species is superficially similar to Kroyeria deetsi Dippenaar, Benz & Olivier, 2000, but differs from it in the following characters. The maxillipeds of the new species are large and project well beyond the lateral margins of the cephalothorax. Those of K. deetsi are much smaller. The third endopodal segments of K. deetsi are twice as long as the second endopodal segments and are provided with prominent marginal denticles. The second and third endopodal segments of the new species are rounded, of similar length and lack teeth. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepod parasite; Kroyeriid; Southern Brazil; South Atlantic. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400027 |
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| Thatcher,Vernon E.; Araújo,Gustavo S. de; Lima,José T. A. X. de; Chellappa,Sathyabama. |
| Cymothoa spinipalpa sp. nov. (Isopoda, Cymothoidae) a buccal cavity parasite of the marine fish, Oligoplites saurus, is described on the basis of eight male specimens and one female. The fish hosts were captured in the coastal waters of Natal, Rio Grande do Norte State, Brazil. In the new species, the anterior margin of the cephalon is doubled ventrally over the bases of the antennae. In this respect, it resembles C. recifea Thatcher & Fonseca, 2005. It differs from that species, however, in being much smaller and having basal carinae on the pereopods 4 to 7 that are small and rounded (not large and pointed). Also, pleopods 2-4 lack the folds and pockets that are present in C. recifea. The new species can be distinguished from all known Cymothoa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Ocean; Isopod parasite; Marine fish parasite. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100032 |
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| Thatcher,Vernon E.. |
| Resumo Dois novos gêneros e espécies de Paramphistomidae Fischoeder. 1901 (Trematoda: Digenea) dos tratos intestinais de peixes foram descritos, a saber: Colocladorchis ventrastomis a. gen., n. sp. de Prochilodus reticulatus; e Dadaytremoides grandistomis n. gen., n. sp. de Astyanax fasciatus e Chaetostomus leucomelas. Estas espécies foram coletadas perto a Cali, Valle, Colômbia. Adicionalmente, o gênero Dadytrema foi redefinido, e D. oxycephala (Diesing, 1836) Travassos, 1934, de Colossoma bidens, procedente de Manaus, Amazonas, Brasil, foi redescrito. |
| Ano: 1979 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000100203 |
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| Thatcher,Vernon E.. |
| Resumo O Amazonadistoma negrensis n. gen., n. sp. (Trematoda : Digenea : Gorgoderidae) foi descrito de um peixe amazônico chamado "sarapó-de-bico", Gymnorhamphichthys hypostomus Ellis (Gimnotoidea : Rhamphichthyidae). O novo gênero é semelhante ao Phyllodistomum, do qual difere por ter a porção posterior do corpo grosso, musculoso e com corrugações laterais; cecos com divertículos; alças uterinas extracecais na região posterior; uma vesícula seminal sinuosa. Também existem diferenças quanto ao habitat, sendo encontrado no intestino do hospedeiro em vez da bexiga urinária. O A. negrensis, sendo totalmente negro, só se permitiu estudá-lo depois de descoloração por cinco semanas numa solução de 1% de amônia. Esta é a primeira citação de um trematódeo negro, e... |
| Ano: 1979 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000300389 |
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| Boeger,Walter A.; Thatcher,Vernon E.. |
| Resumo Kalipharynx piramboae gen. e sp. n. (Trematoda: Fellodistomidae) é descrito do peixe pulmonado Amazônico chamado piramboia, Lepidosiren paradoxa (Dipnoi: Lepidosirenidae). O novo gênero distingue-se dos demais gêneros da família por apresentar uma faringe musculosa com projeções digitiformes anteriores. Entre os gêneros desta família, Kalipharynx assemelha-se mais com Heterorchis Baylis, 1915, do qual, além da faringe, se distingue por ter: 1) Um acetábulo maior; 2) Um poro excretor pequeno e terminal; 3) Uma vesícula seminal sacular não bipartida; e 4) Um hospedeiro de diferente gênero e continente. K. piramboae é o primeiro trematódeo adulto citado em L. paradoxa. |
| Ano: 1983 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671983000100171 |
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| Registros recuperados: 36 | |
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