Komai Tomoyuki
Natural History Museum and Institute; Chiba; 955-2 Aoba-cho; Chiba 260-8682; Japan.
Zootaxa. 2024 Oct 18;5523(5):573-583. doi: 10.11646/zootaxa.5523.5.7.
A new species of the pagurid hermit crab genus Catapagurus A. Milne-Edwards, 1880, is described based on a single male specimen from off Okinawa Islands, Ryukyu Islands, southwestern Japan, at a depth of 150 m. Catapagurus cracens sp. nov. appears closest to C. tenuilamina Komai, Miller & Malay, 2022 among the 27 congeners, but is distinguished from the latter by some minor morphological features, including the more stout ultimate article of the antennular peduncle, unarmed coxae of the chelipeds, the absence of spiniform setae on the dorsal margins of the propodi of the second and third pereopods and the different shape of the terminal cleft of the telson, as well as the living colouration. Sequences of the two mitochondrial markers (16S rRNA and COI genes) were generated for the new species. Although sequences of the COI gene are not available for any congeneric species, the high pairwise genetic divergence of the 16S rRNA gene (11.7%) supports the new taxon as distinct from C. tenuilamina.
基于采自日本西南部琉球群岛冲绳岛外海150米深处的一个雄性标本，描述了寄居蟹科Paguridae的A. Milne-Edwards于1880年建立的Catapagurus属的一个新物种。新物种Catapagurus cracens sp. nov.在27个同属物种中似乎与2022年描述的C. tenuilamina Komai、Miller & Malay最为接近，但与后者在一些微小形态特征上存在差异，包括触角柄节末节更粗壮、螯足基节无武装、第二和第三对步足腕节背缘无刺状刚毛、尾节末端裂的形状不同以及活体颜色。为该新物种生成了两个线粒体标记（16S rRNA和COI基因）的序列。尽管没有任何同属物种的COI基因序列，但16S rRNA基因的高成对遗传差异（11.7%）支持该新分类单元与C. tenuilamina不同。
