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New records and range-extension of the swimming crab Xiphonectes pseudohastatoides (Yang & Tang, 2006) (Brachyura, Portunidae)

In: Crustaceana
Authors:
M. Koch 1Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic

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V. C. Chong 2Institute of Ocean & Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia

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A. Sasekumar 3Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia

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Z. Ďuriš 1Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic

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During an examination of swimming crabs of the Xiphonectes hastatoides species-complex from Malaysia and Vietnam, a series of specimens of Xiphonectes pseudohastatoides (Yang & Tang, 2006) was identified. This small-sized species was recognized based on its flattened pilose carapace with typical shape of its frontal teeth, a pair of long posterior lateral teeth and sharp posterolateral angles forming spines, ‘T’-shaped male abdomen with widely fused segments, and strongly curved first male pleopods. These specimens represent the first record of X. pseudohastatoides outside the northern part of the South China Sea, and thus, an extension of the known species range to central Vietnam and northeastern peninsular Malaysia. A short description and photographs are provided for the examined specimens.

Au cours d’une analyse des crabes du complexe d’espèces Xiphonectes hastatoides de Malaysie et du Vietnam, une série de spécimens de Xiphonectes pseudohastatoides (Yang & Tang, 2006) a été identifiée. Cette espèce de petite taille se reconnaît par sa carapace poilue et aplatie, avec la forme typique de ses dents frontales, une paire de longues dents latérales postérieures et les angles postéro-latéraux aigus formant des épines, l’abdomen mâle en forme de T aux somites largement fusionnés, et les premiers pléopodes mâles fortement incurvés. Ces spécimens représentent la première mention de X. pseudohastatoides en dehors de la partie septentrionale de la mer de Chine du Sud et ainsi, une extension de la présence de cette espèce jusqu’au Vietnam central et à la Malaysie péninsulaire nord-orientale. Une courte description et des photographies des spécimens examinés sont fournies.

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