Dactylogyrids (Platyhelminthes: Monogenoidea) from the gills of Hassar gabiru and Hassar orestis (Siluriformes: Doradidae) from the Xingu Basin, Brazil

Soares, Geusivam B.; Neto, JoãoJoão Flor dos Santos; Domingues, Marcus V.

doi:10.3897/zoologia.35.e23917

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…This reflects the incipient knowledge about the richness and composition of species in the group. Generic groupings are being recognized continuously, representing approximately 60 years of efforts of different scientists and research groups [3,19,29,30,35,36]. At early stages of faunal characterization, it is common to generate "catch-all" genera to accommodate morphologically similar species.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequently, several other species were proposed [1,38]. Presently, 15 species of Cosmetocleithrum are known from Brazil, Argentina, and Peru [22,27,34,36,41] from siluriform hosts belonging mainly to the Doradidae but also the Auchenipteridae and Pimelodidae. A single report of a species of Cosmetocleithrum in Hoplias malabaricus (Bloch) (Erythrinidae, Characiformes) [13] requires confirmation due to the unexpected association.…”

Section: Introductionmentioning

confidence: 99%

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Dactylogyridae (Monogenoidea, Polyonchoinea) from the gills of Auchenipterus nuchalis (Siluriformes, Auchenipteridae) from the Tocantins River, Brazil

et al. 2020

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Two species of Cosmetocleithrum Kritsky, Thatcher & Boeger, 1986 (both new) and two species of Demidospermus Suriano, 1983 (one new) are reported from the gills of the catfish Auchenipterus nuchalis, popularly known as “mapará”, from the Tocantins River and tributaries, North Region of Brazil. Cosmetocleithrum berecae n. sp. differs from all other species presently known in the genus by the morphology of the anchors presenting an elongate shaft and short recurved point, a coiled male copulatory organ (MCO) with three rings, and an elongate slender accessory piece with a bifurcated distal end. Cosmetocleithrum nunani n. sp. differs from its congeners by the combination of the following features: (1) Ventral and dorsal anchors with moderately long curved shaft and short point; (2) Hooks with poorly developed thumb; (3) Hook pairs 5 and 6 similar to each other, but morphologically distinct from remaining hook pairs; and (4) MCO coiled, with approximately 1.5 rings. Demidospermus tocantinensis n. sp. is easily distinguished from other species of the genus by presenting an inverted-G-shaped MCO with a median knee-like expansion. Demidospermus osteomystax Tavernari, Takemoto, Lacerda & Pavanelli, 2010 is redescribed based on paratypes and specimens from the gills of A. nuchalis from the Tocantins River, a new host and locality records for this species. The monotypic Paracosmetocleithrum Acosta, Scholz, Blasco-Costa, Alves & Silva, 2017, the only other Neotropical genus reported in siluriforms besides Cosmetocleithrum with species presenting two ribbon-like projections on the posterior margin of the dorsal bar, is considered a junior subjective synonym of Cosmetocleithrum.

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