Monogeneans (Platyhelminthes: Monogenea) parasites gills Brachyplatystoma filamentosum (Lichtenstein, 1819) (Siluriformes: Pimelodidae) from Araguaia river, State of Mato Grosso, Brazil. / Monogenéticos (Platyhelminthes: Monogenea) parasitos das brânquias de Brachyplatystoma filamentosum (Lichtenstein, 1819) (Siluriformes: Pimelodidae) do Rio Araguaia, Estado de Mato Grosso, Brasil.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

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 França, 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.

ASSUNTO(S)

araguaia river parasitologia biodiversity brachyplatystoma filamentosum ggênero novo. biodiversidade new genus. rio araguaia monogenea brachyplatystoma filamentosum

ACESSO AO ARTIGO

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