Yamashita Ryunosuke, Komai Tomoyuki, Koreeda Reo
Cource of Marine Resources and Environment; Graduate School of Marine Science and Technology; Tokyo University of Marine Science and Technology; 4-5-7 Konan; Tokyo; Minato 108-8477 Japan.
Natural History Museum and Institute; Chiba; 955-2 Aoba; Chiba; Chuo 260-8682; Japan.
Zootaxa. 2024 Dec 17;5555(1):91-104. doi: 10.11646/zootaxa.5555.1.6.
In the present study, a new species of the alpheid shrimp genus Potamalpheops Powell, 1979, Potamalpheops yamakawai, is described from Japan. The new species, representing the first species of the genus to be recorded from the Japanese waters, appears to be close to P. miyai Yeo & Ng, 1997, known from mangroves in Indonesia and the Philippines, among the 16 previously known congeners. The non-setose ventrolateral margin of the carapace, the lack of spiniform setae on the pereopod 5 merus, the simple posterolateral tooth of the uropodal exopod and the overall colouration distinguish P. yamakawai sp. nov. from P. miyai. Genetic analysis using the mitochondrial 16S rRNA gene suggests that the new taxon is not conspecific with P. miyai. Specimens of the new species were collected from upstream of tidal limit to estuarine habitats, sometimes inhabiting burrows of other animals.
