Taxonomy of the genus Elasmopus (Crustacea, Amphipoda) in Japan and South Korea, with description of a new species Author Yoshimura, Hiro https://orcid.org/0009-0005-1297-4368 Graduate School of Humanities and Social Sciences, Hiroshima University, 1 - 1 - 1 Kagamiyama, Higashihiroshima, Hiroshima 739 - 8524, Japan Author Lee, Chi-Woo 0000-0002-0763-4271 Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea Author Tomikawa, Ko 0000-0003-1521-9016 Graduate School of Humanities and Social Sciences, Hiroshima University, 1 - 1 - 1 Kagamiyama, Higashihiroshima, Hiroshima 739 - 8524, Japan text ZooKeys 2025 2025-12-02 1261 307 335 journal article 313310 10.3897/zookeys.1261.162923 8e94f76b-77a9-47d8-af11-e1f9b4f94b96 9DCB403A-2E55-4D80-B00E-9E0977AB9C00

Table 4. Kimura two-parameter distances (K 2 P distances) among Elasmopus species showing minimum – maximum values (mean value). “ n ” indicates the number of specimens, and “ loc. ” Indicates the number of collecting sites.

	E. koreanus (n = 3, loc. = 3)	E. lumbiniger sp. nov. (n = 6, loc. = 6)	E. mukuinu (n = 4, loc. = 4)	E. nkjaf (n = 2, loc. = 1)	E. projectus (n = 3, loc. = 2)	E. rapax (n = 6, loc. = 2)
E. koreanus	0.002–0.025 (0.017)
E. lumbiniger sp. nov.	0.233–0.244 (0.238)	0.002–0.044 (0.017)
E. mukuinu	0.239–0.247 (0.243)	0.192–0.216 (0.201)	0.003–0.052 (0.028)
E. nkjaf	0.222–0.226 (0.224)	0.215–0.222 (0.219)	0.205–0.211 (0.208)	0.006 (-)
E. projectus	0.207–0.213 (0.210)	0.181–0.198 (0.189)	0.189–0.207 (0.200)	0.218–0.224 (0.221)	0.008–0.025 (0.018)
E. rapax	0.217–0.224 (0.221)	0.219–0.235 (0.224)	0.200–0.219 (0.206)	0.211–0.226 (0.217)	0.186–0.196 (0.189)	0.000–0.003 (0.001)