Prosorhynchus Odhner, 1905 (Digenea: Bucephalidae) from the orange-spotted grouper Epinephelus coioides (Hamilton, 1822) (Epinephelidae), including Prosorhynchus tonkinensis n. sp., from the Gulf of Tonkin, Vietnam

Autor: Truong, V. Thuong; Palm, H.W.; Bui, Q. Te; Ngo, T.T; Huong; Bray, R.A.
In:

Zootaxa

Bandangabe: 4170
Auflage: 1
ISBN: 1175-5326
DOI: doi.org/10.11646/zootaxa.4170.1.3
Seite: 71 - 92
Jahr: 2016

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
A total of 169 specimens of the orange-spotted grouper Epinephelus coioides (Hamilton) were collected from fishermen
and marine fish farms in the Gulf of Tonkin, Vietnam. Five different species of Prosorhynchus Odhner, 1905 were recorded,
including P. tonkinensis n. sp. The new species differs from all other Prosorhynchus species in the presence of an indented
posterior extremity. It can be distinguished from the most closely related P. atlanticus Manter, 1940 and P.
crucibulum Rudolphi, 1819 by the extension of the uterus always to the level of the ovary, the width and premouth distance
in the former, and the arched vitellarium and smaller egg size in the latter, and a different host and geographical region.
Prosorhynchus sp. A (not fully identified in this study) has been earlier reported from E. coioides from New Caledonia
(see Prosorhynchus sp. B of Bray and Justine, 2013), P. luzonicus Velasquez, 1959 is reported throughout South-East Asia,
and Prosorhynchus sp. B (no further identification possible based on a single specimen in this study) and P. maternus Bray
& Justine, 2006 are reported for the first time from Vietnam. The present study demonstrates a close relationship of the
Prosorhynchus species composition in Vietnam with the Indo-Australian region, warranting further comparative studies
among the different epinephelids.

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