Two new species of the crangonid genus Metacrangon Zarenkov, 1965 (Crustacea: Decapoda: Caridea) from the Okinawa Trough, Japan
Two new species of the crangonid genus Metacrangon Zarenkov, 1965 (Crustacea: Decapoda: Caridea) from the Okinawa Trough, Japan
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日本冲绳海槽的两种新种 Metacrangon Zarenkov（甲壳纲：十足目：Caridea）
DOI：
10.11646/zootaxa.4410.1.5
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发表时间：
2018
期刊：
影响因子：
0.9
通讯作者：
WATANABE HIROMI KAYAMA
中科院分区：
文献类型：
--
作者：
KOMAI TOMOYUKI;CHEN CHONG;WATANABE HIROMI KAYAMA
本文描述了采自日本南部琉球群岛冲绳海槽的两个新种：M.琉球; sp.，产于Iheya岛外海，水深986 m; Metacrangon kaiko n. sp.分布于与那国岛东北部，水深2205 m。这两个新物种与M. munita（Dana，1852）种群，但都具有在第4和第5腹足上具刚毛的趾状突的特征。一些微小的差异，形态和遗传分析，使用条形码线粒体COI基因的部分序列支持识别的两个新物种。这两个新种的全模标本是从受热液影响的地区采集的，代表了Metacrangon物种以前未知的栖息地。
Two new species of the crangonid shrimp genus Metacrangon Zarenkov, 1965, are described and illustrated on the basis of materials collected from the Okinawa Trough, Ryukyu Islands, southern Japan, during diving operations of remotely operated vehicles (ROVs): M. ryukyu n. sp. from off Iheya Island, at depth of 986 m; and Metacrangon kaiko n. sp. from NE of Yonaguni Island, at depth of 2205 m. The two new species resemble members of the M. munita (Dana, 1852) species group, but are both characteristic in having setose dactyli on pereopods 4 and 5. Some minor differences in morphology and genetic analysis using partial sequences of the barcoding mitochondrial COI gene support the recognition of the two new species. Holotypes of the two new species were collected from hydrothermally influenced areas, representing a previously unknown habitat for species of Metacrangon.