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Original Article • Rev. Bras. Parasitol. Vet. 29 (3) • 2020 • https://doi.org/10.1590/S1984-29612020039   copy

New species of Urocleidoides (Monogenoidea: Dactylogyridae) from the gills of two species of Anostomidae from the Brazilian Amazon

Novas espécies de Urocleidoides (Dactylogyridae) das brânquias de duas espécies de Anostomidae da Amazônia brasileira

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Three species (2 new) of Urocleidoides are described and/or reported from the gills of Schizodon fasciatus and Laemolyta proxima (Anostomidae) from the Jari River in the eastern Brazilian Amazon. Urocleidoides jariensis n. sp. presents a sclerotized, tubular, spiral male copulatory organ (MCO) with one counterclockwise coil, a circular sclerotized tandem brim associated with the base of the MCO; a heavily sclerotized, funnel-shaped vaginal vestibule; and a broadly V-shaped ventral bar with anteromedial constriction and enlarged ends. Urocleidoides ramentacuminatus n. sp. has a sclerotized, tubular, spiral MCO with one counterclockwise coil; an accessory piece with a hook-shaped distal portion; and a dorsal anchor with a short, straight shaft; anchor point with ornamentation as sclerotized shredded filaments. Urocleidoides paradoxus is reported for the first time parasitizing S. fasciatus.

Keywords:
Amazon; anostomidae; monogenoids; parasites; freshwater fish

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