Pseudempleurosoma haywardi sp. nov. (Monogenoidea: Ancyrocephalidae) from Oesophagus of Croakers (Teleostei: Sciaenidae) in Indonesia

Autor: Theisen, S.; Palm, H.W.; Al-Jufaili, S.; Kleinertz, S.
In:

PlosOne

ISBN: 1932-6203
DOI: https://doi.org/10.1371/journal.pone.0184376
Seite: 1 - 18
Jahr: 2017

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
An endoparasitic monogenean was identified for the first time from Indonesia. The oesophagus and anterior stomach of croakers Nibea soldado (Lacepède) and Otolithes ruber (Bloch & Schneider) (Sciaenidae, n = 35 each, sampled from the South Java coast in May 2011) were infected with Pseudempleurosoma haywardi sp. nov. with prevalences of 62.9 and 45.7 % respectively. Both croakers represent new hosts for this monogenean genus. We provide infection rates, light microscopy and, for the first time, 3D confocal microscopy illustrations as well as a morphometric comparison with the five described congeners. The new species differs in body size, position and shape of the ovary and testes, and especially in the composition of the dorsal anchor complex, displaying the longest dorsal hooks in the genus and a dorsal bar being anteriorly concave, while all so far described dorsal bars of the congeners are either planar or convex. Moreover, the ventral anchor of this new species is the longest in the genus, while the male copulatory organ is the smallest.

Keywords: Dactylogyridae, “diplectanotrema-group”, Ancyrocephalidae, oesophagus, Nibea soldado, Otolithes ruber, 3D confocal microscopy, zoogeography

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