Komai Tomoyuki, Minemizu Ryo
Natural History Museum and Institute, Chiba, 955-2 Aoba-cho, Chuo-ku, Chiba, 260-8682 Japan.; Email:
Ryo Minemizu Photo Office, 224-1 Yahata, Shimizu, Sunto-gun, Shizuoka, 411-0906 Japan; Email: unknown.
Zootaxa. 2014 Mar 27;3784:171-8. doi: 10.11646/zootaxa.3784.2.6.
A third species of the pontoniine shrimp genus Eupontonia Bruce, 1971, E. gracilipes n. sp., is described and illustrated on the basis of a single female specimen collected from shallow water of Ishigaki Island, southern Ryukyu Islands, Japan. The new species is readily distinguished from the two congeneric species, E. noctalbata Bruce, 1971 and E. oahu Bruce, 2010, by a number of morphological characters, including the presence of a distinct postrostral median ridge and of the postrostral median tooth on the carapace. It is considered to be a free-living species. The generic diagnosis of Eupontonia is slightly emended to accommodate the present new species. A key in aid of identification of species of Eupontonia is provided.
1971年，布鲁斯描述了仿岩虾属（Pontoniine Shrimp Genus）的第三个物种——细足仿岩虾（Eupontonia gracilipes n. sp.），并根据从日本琉球群岛南部石垣岛浅水区采集的单个雌性标本对其进行了描述和绘图。通过一些形态特征，包括头胸甲上明显的额后中脊和额后中齿的存在，新物种很容易与两个同属物种——1971年的暗夜仿岩虾（E. noctalbata Bruce）和2010年的瓦胡岛仿岩虾（E. oahu Bruce）区分开来。它被认为是一种自由生活的物种。对仿岩虾属的属征进行了轻微修订，以容纳这个新物种。提供了一个有助于鉴定仿岩虾属物种的检索表。
