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Licensed Unlicensed Requires Authentication Published by De Gruyter April 13, 2018

A new species of Chondracanthus (Cyclopoida: Chondracanthidae) parasitic on deep-sea Dibranchus spongiosa(Lophiiformes: Ogcocephalidae) from the Eastern Central Pacific

Samuel Gómez, Hugo Aguirre-Villaseñor and Francisco Neptali Morales-Serna
From the journal Acta Parasitologica

Abstract

A total of 228 sampling stations were visited for benthic fauna during a series of oceanographic cruises in the Gulf of California, west coast of the Baja California Peninsula, and Eastern Central Pacific from year 1991 to 2014. Among others, three fish species of the genus Dibranchus were caught in 28 stations. Of these, D. spongiosa was the most common and abundant. Close inspection of this fish revealed the presence of a new species of parasitic copepod, Chondracanthus dibranchi sp. nov., found in the gill cavity of seven specimens of D. spongiosa. Chondracanthus dibranchi sp. nov. seems to be morphologically related to C. psetti and C. janebennettae. The female of C. janebennettae can be separated from these other two congeners by the general shape of the head and abdomen, by the number of teeth on the mandibular blade, and by the general body shape. Chondracanthus psetti and C. dibranchi sp. nov. share the relative lengths of legs 1 and 2, the relative size and shape of the genito-abdomen, and the conical attenuating lateral processes on the trunk of the female. The females of these two species can be separated by the shape and armature of the antennule, shape of the antenna, the claw of the maxilliped, the rami of leg 1 and 2 and posterior processes, the head region, and by the position of the lateral processes of the trunk. An amendment to Tang’s (2007) key to the species of Chondracanthus is proposed.

Acknowledgements

This study was financed by the Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica (PA-PIIT) of the Dirección General de Asuntos del Personal Académico of the Universidad Nacional Autónoma de México (PAPIIT-DGAPAUNAM), project IN202116. Ship time of the research cruises Talud III-XV on board R/V “El Puma” was supported by the Universidad Nacional Autónoma de México and CONACyT (Talud XV). Sampling campaigns were partly supported by CONACyT (Projects 31805-N and 179467) and PAPIIT-DGAPA-UNAM (Project IN-217306-3). We are grateful to Edgar Cruz Acevedo and Carolina Salas Singh for their invaluable assistance during Talud XV and XVI cruises, and to all scientists, students and crew members for their help and support during the Talud III-XII, and XV.

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Received: 2017-7-28
Revised: 2018-2-12
Accepted: 2018-2-15
Published Online: 2018-4-13
Published in Print: 2018-6-26

© 2018 W. Stefański Institute of Parasitology, PAS

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