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Studies on the hippolytid shrimps from Japan, I. : Revision of the Japanese species of the genus Eualus, with description of two new species

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概要 In spite of the abundance of the species belonging to the family Hippolytidae in shallow waters, there is little information on their fauna1 works from the taxonomical aspect in Japan. We will attempt... to reveal and revise the hippolytid fauna of Japan and its adjacent seas in the series of this study. The first report deals with the species belonging to the genus Eualus which has been establised by Thallwitz in 1892. The generic name, however, has not been adopted by many other authors, except for the Russian authors, and this genus has been included in the large genus Spirontocaris Bate. Holthuis (1947) divided this Spirontocaris s. 1. into six genera, by the presence or absence of the spines on the carapace and of the exopod on the third maxilliped. We follow his classification in this study. The genus Eualus is characterized by having a mandibular palp of two segments, an exopod on the third maxilliped and no supraorbital spine. The five species of the genus EuaEus have been reported from Japanese seas, e. g. E. bimguz's (Rathbun), E. gracilirostris (Stimpson), E. leptognathus (Stimpson), E. rniddendorfi (Brashnikov) and E. fabricii (KrФyer), the last one of them is not available. In addition to these four species, E. kuratai and E. kikuchii, so far as we know, are new to the science. The material used in this paper is deposited at the Zoological Laboratory, Faculty of Agriculture, Kyushu University (ZLKU).続きを見る

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登録日 2012.07.20
更新日 2021.02.05

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