New species of urocleidoides (Monogenoidea: Dactylogyridae) from the gills of two species of anostomidae from the brazilian amazon

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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.

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Oliveira, M. S. B., Santos-Neto, J. F., Tavares-Dias, M., & Domingues, M. V. (2020). New species of urocleidoides (Monogenoidea: Dactylogyridae) from the gills of two species of anostomidae from the brazilian amazon. Revista Brasileira de Parasitologia Veterinaria, 29(3), 1–14. https://doi.org/10.1590/s1984-29612020039

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