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Acanthocotyle gurgesiella n. sp. (Monogenea: Acanthocotylidae) from the deep-sea skate Gurgesiella furvescens (Rajidae) in the south-eastern Pacific

Published online by Cambridge University Press:  21 March 2017

L.A. Ñacari ,
F.A. Sepulveda ,
R. Escribano  and
M.E. Oliva
L.A. Ñacari
Affiliation:
Instituto Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Chile, PO Box 170, Antofagasta, Chile Instituto Milenio de Oceanografía, Universidad de Concepción, Chile
F.A. Sepulveda
Affiliation:
Instituto Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Chile, PO Box 170, Antofagasta, Chile
R. Escribano
Affiliation:
Instituto Milenio de Oceanografía, Universidad de Concepción, Chile
M.E. Oliva*
Affiliation:
Instituto Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Chile, PO Box 170, Antofagasta, Chile Instituto Milenio de Oceanografía, Universidad de Concepción, Chile
*
*E-mail: marcelo.oliva@uantof.cl
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Abstract

Little is known about the diversity of parasites of the deep-sea fish of the world's oceans. Here, a new species of monogenean parasite of the deep-sea skate Gurgesiella furvescens is described. Specimens of parasites were obtained from the skin of two specimens of the dusky finless skate, G. furvescens (Rajidae), in the vicinity of Valparaiso (33°S, 72°W), central Chile, from midwater trawl fishing at depths of 350–450 m. Both morphological and molecular analyses were conducted to provide a full description of the new species, named Acanthocotyle gurgesiella. For the molecular analyses, nuclear large subunit (LSU) rDNA and the mitochondrial gene cytochrome c oxidase 1 (COI) were used. From the morphological analysis and a comparison with the known species of the genus, A. gurgesiella can be identified by a combination of morphological characteristics, including the number of testes, number of radial rows of sclerites in the pseudohaptor, aperture of the genital pore and shape of the vitelline follicles. The results from the DNA analysis indicated that A. gurgesiella has a genetic divergence of 3.2–3.7% (LSU rDNA gene) from A. urolophi, the only congener species for which molecular data are available.

Type
Research Papers
Information
Journal of Helminthology , Volume 92 , Issue 2 , March 2018 , pp. 223 - 227
Copyright
Copyright © Cambridge University Press 2017 

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