Komai Tomoyuki, Tsuchida Shinji, Fujiwara Yoshihiro
Natural History Museum and Institute; Chiba; 955-2 Aoba-cho; Chuo-ku; Chiba 260-8682; Japan.
Japan Agency for Marine-Earth Science and Technology (JAMSTEC); 2-15; Natsushima-cho; Yokosuka; Kanagawa 237-0061; Japan.
Zootaxa. 2024 Nov 11;5537(3):357-376. doi: 10.11646/zootaxa.5537.3.4.
Two new species of the axiid shrimp genus Eiconaxius Bate, 1888, are described from seamounts in the Nishi-Shichito Ridge, northwestern Pacific off Japan, during recent cruises of R/V Kaimei of the Japan Agency for Marine-Earth Science and Technology, exploring the marine protected area (MPA). Eiconaxius latirostrum sp. nov. is described on the basis of three specimens from Shoho Seamount at depths of 402-456 m; and E. kaimei sp. nov. is described on the basis of a single ovigerous female from An'ei Seamount at a depth of 888 m. The status of the two new taxa was assessed by phylogenetic analyses employing two mitochondrial markers (16S rRNA and COI genes) and morphological comparison. Specimens of the two new species lived in colonies of unidentified farreid sponges. This study contributes to documenting the benthic invertebrate fauna of the Japanese MPA as a baseline data for conservation.
在日本海洋地球科学技术局的“海明号”（R/V Kaimei）最近对西北太平洋日本以西的西七岛海岭海山进行的巡航考察海洋保护区（MPA）期间，描述了1888年命名的艾氏虾属（Eiconaxius Bate）的两个新物种。宽吻艾氏虾（Eiconaxius latirostrum sp. nov.）依据采自初宝海山402 - 456米深处的三个标本进行描述；而海明艾氏虾（E. kaimei sp. nov.）则依据采自安庆海山888米深处的一只抱卵雌虾进行描述。通过使用两个线粒体标记（16S rRNA和COI基因）的系统发育分析以及形态比较，对这两个新分类单元的地位进行了评估。这两个新物种的标本生活在未鉴定的法氏海绵群落中。本研究有助于记录日本海洋保护区的底栖无脊椎动物区系，作为保护的基线数据。
