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BIOLOGICAL SCIENCES • An. Acad. Bras. Ciênc. 92 (suppl 2) • 2020 • https://doi.org/10.1590/0001-3765202020180933   copy

Dendrapta nasicola n. sp. (Copepoda: Siphonostomatoida: Lernaeopodidae) a parasite from the olfactory sacs of Bathyraja scaphiops (Norman, 1937) in the South Western Atlantic

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

During a parasitological survey of the olfactory sacs of 21 species of Rajiformes (Chondrichthyes) from the Southwestern Atlantic Ocean, copepods referable to Dendrapta Kabata (1964)KABATA Z. 1964. Revision of the genus Charopinus Krøyer, 1863 (Copepoda: Lernaeopodidae). Vidensk Meddr Dansk Naturh Foren 127: 85-112. (Siphonostomatoida: Lernaeopodidae) were found parasitizing the cuphead skate Bathyraja scaphiops (Rajiformes: Arhynchobatidae). Morphological analyses using both light and electron microscopy revealed that they belong to a new species. It can be easily distinguished from its congeners by the ratio between lengths of posterior process and trunk (1:0.8), the large to width ratio of trunk (1:0.7) and the armature of the antennule (1, 1, 5 + 1 aesthete). Dendrapta cameroni longiclavata is raised to full specific status, as Dendrapta longiclavata n. comb. Kabata & Gusev, 1966.

Key words
Bathyraja scaphiops; Dendrapta; Mar Argentino; South West Atlantic

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