Made available in DSpace on 2016-04-28T20:15:33Z (GMT). No. of bitstreams: 1 2009 - Patricia Barizon Cepeda.pdf: 4456439 bytes, checksum: 76acf89f6f60c2d403100e8366a812b4 (MD5) Previous issue date: 2009-02-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / A new genus and five new species of dactylogyrid monogeneans were described from the gills of Brachyplatystoma filamentosum (Pimelodidae). The fishes were collected from the Araguaia river, State of Mato Grosso, Brazil. The new genus is characterized by a combination of characters which included gonads tandem, germarium ovate or elongate, anterior to testis, copulatory organ J shaped or curved and accessory piece non-articulated or articulated, prostatic reservoir is ovate when observed, vagina sinistro-marginal, sclerotized or not, haptor subhexagonal with shank simple and similar hooks. Characteristics of the new genus resembles Demidospermus Suriano, 1983, Aphanoblastella Kritsky, Mendoza-Franco e Scholz, 2000, Pseudovancleaveus Fran?a, Issac, Pavanelli e Takemoto, 2003, Unibarra Suriano e Incorvaia, 1995 and Unilatus Mizelle e Kritsky, 1967. Morphological differences among the five new species are based on: Genus n., sp. n. 1 possessing ventral bar slightly curved and dorsal bar straight, both with the large ends; accessory piece slightly curved, nonarticulated; copulatory organ shaped-J with ornamentation. Genus n., sp. n. 2 possessing ventral bar slightly curved and dorsal bar straight with ends slightly curved; vagina sclerotized; copulatory organ shaped-J; accessory piece with two lobes, articulated and prostatic reservoir present. Genus n., sp. n. 3 present peduncle elongate; ventral bar slightly curved with a small prominence in the antero-median region, dorsal bar elongate, with ends slightly curved; accessory piece curved, articulated; copulatory organ curved with ornamentation. Genus n., sp. n. 4 possessing ventral bar slightly curved, with a small prominence in the antero-median region and dorsal bar straight, both with large ends; accessory piece curved with large proximal end; copulatory organ shape-J with ornamentation. Genus n., sp. n. 5 possessing peduncle elongate; ventral, dorsal bar slightly curved, dorsal bar present a prominence in the antero-median region; vagina sclerotized; accessory piece articulated, irregular and copulatory organ shaped-J; prostatic reservoir present. / Como resultado do estudo taxon?mico dos parasitos de br?nquias de Brachyplatystoma filamentosum (Pimelodidae) provenientes do rio Araguaia, Mato Grosso, Brasil, um novo g?nero (Gen. n..) de Dactylogyridae (Monogenea) ? proposto e cinco esp?cies novas (Gen. n., sp. n. 1, 2, 3, 4 e 5) foram descritas. O g?nero novo est? caracterizado por uma combina??o de caracteres que inclui: g?nadas n?o superpostas, germ?rio pr?-testicular alongado ou oval, ?rg?o copulat?rio masculino em forma de J ou curvo, pe?a acess?ria articulada ou n?o, reservat?rio prost?tico oval quando presente, vagina sinistro-marginal esclerotizada ou n?o, haptor subhexagonal com sete pares de ganchos similares entre si. As caracter?sticas que definem o g?nero novo sugerem semelhan?as morfol?gicas com Demidospermus Suriano, 1983, Aphanoblastella Kritsky, Mendoza-Franco e Scholz, 2000, Pseudovancleaveus Fran?a, Issac, Pavanelli e Takemoto, 2003, Unibarra Suriano e Incorvaia, 1995 e Unilatus Mizelle e Kritsky, 1967. As diferen?as morfol?gicas entre as cinco esp?cies do g?nero novo s?o: G?nero n., sp. n. 1 possui barra ventral ligeiramente curva e barra dorsal reta, ambas com extremidades alargadas; apresenta pe?a acess?ria ligeiramente curva, n?o articulada; ?rg?o copulat?rio em forma de J com ornamenta??o; aus?ncia de reservat?rio prost?tico. G?nero n. sp. n. 2. possui barra ventral ligeiramente curva e barra dorsal reta com extremidades ligeiramente curvas; presen?a de vagina esclerotizada; org?o copulat?rio em forma de J; pe?a acess?ria bilobada, articulada e presen?a de reservat?rio prost?tico. G?nero n. sp. n. 3 apresenta o ped?nculo longo; possui barra ventral ligeiramente curva com pequena proemin?ncia na regi?o antero-mediana; barra dorsal reta, alongada, com extremidades ligeiramente curvas; pe?a acess?ria curva, articulada e ?rg?o copulat?rio curvo, com ornamenta??o. G?nero n., sp. n. 4 apresenta barra ventral ligeiramente curva com pequena proemin?ncia na regi?o antero-mediana e barra dorsal reta, ambas com extremidades alargadas; pe?a acess?ria curva com a extremidade proximal mais larga; ?rg?o copulat?rio em forma de J, com ornamenta??o. G?nero n., sp. n. 5 possui o ped?nculo largo; barra ventral quase reta e barra dorsal ligeiramente curva com pequena proemin?ncia na regi?o anteromediana; vagina esclerotizada; pe?a acess?ria articulada e irregular e ?rg?o copulat?rio apresenta forma de J, presen?a de reservat?rio prost?tico. Estes s?o os primeiros registros de monogen?ticos parasitando B. filamentosum.