Maizuru Fisheries Research Station, Kyoto University, Nagahama, Maizuru, Kyoto, 6250086 Japan..
Graduate School of Kuroshio Science, Kochi University, 2-5-1 Akebono, Kochi 780-8520, Japan..
Zootaxa. 2022 Sep 8;5182(5):465-478. doi: 10.11646/zootaxa.5182.5.4.
The ghost shrimp genus Callianassa Leach, 1814 is currently represented by six taxa, of which five are known from the eastern Atlantic and only C. persica Sakai, 2005 from the Persian Gulf. In this study, a new species of Callianassa is described and illustrated on the basis of material from the subtidal soft sediments (at 2628 m depth) in Wakasa Bay, western Japanese coast of the Sea of Japan. Callianassa ogurai n. sp. is the first species of the genus from the Pacific region. This study discusses characters differentiating the new species and other five congeneric species. Molecular phylogenetic analysis using the mitochondrial 16S rRNA gene supports the close relationship between the new species and C. subterranea (Montagu, 1808), warranting the generic assignment of the new species to Callianassa sensu stricto. We also explore the contentious taxonomic status of C. timiris (Sakai, Trkay, Beck Freiwald, 2015).
幽灵虾属 Callianassa Leach, 1814 目前由六个分类群组成，其中五个分布在东大西洋，只有 2005 年 Sakai 命名的 Callianassa persica 来自波斯湾。本研究基于来自日本海西部若狭湾潮下带软泥沉积物（水深 2628 米）的材料，描述并图示了一个幽灵虾属的新种。Callianassa ogurai n. sp. 是该属在太平洋地区的第一个物种。本研究讨论了新种与其他五个同属种的区别特征。使用线粒体 16S rRNA 基因的分子系统发育分析支持新种与 Callianassa subterranea （Montagu, 1808）的密切关系，证明了将新种归入 Callianassa sensu stricto 的有效性。我们还探讨了 Callianassa timiris （Sakai, Trkay, Beck Freiwald, 2015）有争议的分类地位。
