Polycheria acercauda sp. nov., an amphipod symbiotic with sponges and ascidians in Korean waters, is established herein as a new species, along with a detailed description and illustrations. This new species is closely related to the following three known species of the genus from the Far East: Polycheria amakusaensis Hirayama, 1984, P. japonica Bulycheva, 1952, and P. orientalis Hirayama, 1984. However, Polycheria acercauda sp. nov. can be distinguished from the other congeners by the following combination of characteristics: (1) on antenna 2, the anterior margin of peduncular article 4 is pubescent; (2) on gnathopod 2, the palm is clearly distinct; (3) on uropod 3, the inner ramus is lined with plumose setae; and (4) on the telson, the apices are acute. This is the first report of the genus Polycheria Haswell, 1879 belonging to the family Dexaminidae Leach, 1814 from Korean waters.
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机译：刺桐（Pochercheria acercauda sp。） nov。，一种在韩国水域中与海绵和海鞘共生的两栖类共生动物，连同详细的说明和插图在本文中被确定为新物种。这个新物种与远东的以下三个已知物种密切相关：1984年的平山Polycheria amakusaensis Hirayama，1952年的P. japonica Bulycheva和1984年的P. Orientalis Hirayama P. Orientalis Hirayama。十一月可以通过以下特征的组合与其他同类物区分开：（1）在触角2上，小脑梗物品4的前边缘是短柔毛; （2）在棘足类动物2上，手掌明显不同; （3）在尾足3上，内支具内衬有羽状刚毛; （4）在telson上，顶点是尖锐的。这是来自朝鲜水域的1814年Dexaminidae Leach家族Polycheria Haswell属的首次报道（1879年）。
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