A New Species of the Genus Caprella (Crustacea: Amphipoda: Caprellidae) Collected from a Gorgonian at 1497 m Depth off Boso Peninsula, Central Japan

Q4 Agricultural and Biological Sciences

Species Diversity Pub Date : 2021-09-10 DOI:10.12782/specdiv.26.225

I. Takeuchi, Momo Shiraishi, R. Mimori

引用次数: 2

Abstract

Caprella nojimaensis sp. nov. (Crustacea: Amphipoda: Caprellidae), inhabiting the gorgonian Calcigorgia gracilis Matsumoto, van Ofwegen, and Bayer, 2019, is described based on a specimen from 1497 m depth in the Nojima Submarine Canyon, off Boso Peninsula, central Japan. The species is closely related to C. gracillima Mayer, 1890, but differs from the latter in gnathopod 2 being positioned near the anterior margin of pereonite 2 and in the presence of paired small mid-dorsal projections on pereonites 2 and 5. The body colour of live material is pale pink, with mouth parts and gnathopod 2 fringed with darker pink, revealing protective colouration that matches that of the host gorgonian. The clinging behaviour in situ is “upright” as recorded by the remotely operated vehicle Hyper-Dolphin, and the presence of dense swimming setae on antenna 2 suggests that the caprellid feeds by filtering material suspended in

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Caprella属的一新种（甲壳纲：两栖纲：Caprellide）从日本中部博须半岛1497米深处的一个Gorgonian采集

根据日本中部博索半岛附近野岛海底峡谷1497米深处的一个标本，描述了栖息在松本、van Ofwegen和Bayer等蛇发动物Calcigoria gracilis Matsumoto、van Ofweigen和Bayer2019中的野岛小蠊（Caprella nojimaensis sp.nov.）（甲壳纲：两栖纲：小蠊科）。该物种与C.gracillima Mayer（1890）亲缘关系密切，但与后者的不同之处在于，颚足类2位于潜骨2的前缘附近，并且在潜骨2和5上存在成对的中背小突起。活体材料的体色为淡粉色，嘴部和颚足2的边缘有深粉色，显示出与宿主蛇床虫相匹配的保护色。遥控飞行器Hyper Dolphin记录到，原地的紧贴行为是“直立的”，天线2上密集的游动刚毛的存在表明，caprellid通过悬浮在

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来源期刊

Species Diversity Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： Species Diversity is a peer-reviewed, open-access international journal on all aspects of animal species diversity. Species Diversity is published by the Japanese Society of Systematic Zoology. It is the English-language successor of the Proceedings of the Japanese Society of Systematic Zoology and complements the latter’s Japanese-language continuation, Taxa. e purpose of Species Diversity is to facilitate the international ex change of information about animal species diversity by publishing papers dealing with all aspects of taxonomy, systematics, speciation, biogeography, and life his tory research.