Euochin longyangensis (Lei & Peng, 2012) comb. nov.

Figs 89–103

Euophrys longyangensis Lei & Peng, 2012: 2, figs 1a, 5a–c (♁ only, ♀ mismatched).

Material examined. 1♁ 1♀ (MHBU-ARA-00025234), CHINA: Yunnan Province, Baoshan City, Longyang District, Baihualing Village, Zaotanghe (ĦAEḦḤaeDzã), 25.305794°N, 98.799406°E, 1607 m a.s.l., 19 June 2022, leg. L. Zhang, W. Wang, M. Xu & Z. Yang.

Diagnosis. Both sexes closely resemble Euochin wanlessi sp. nov. in genitalic structure. Males can be recognized by: (1) the portion between the embolic flange and the embolus deeply depressed in Euochin longyangensis comb. nov., while not depressed in E. wanlessi sp. nov.; (2) the central part of the embolus without a ridge in E. longyangensis comb. nov., but with a ridge in E. wanlessi sp. nov. (cf. Figs 94–97, 100–101, 179–182, 185–186). Females of the two species can be distinguished by: (1) the epigynal window larger in E. longyangensis comb. nov., while evidently smaller in E. wanlessi sp. nov., and (2) the copulatory duct thicker in E. longyangensis comb. nov. than in E. wanlessi sp. nov. (cf. Figs 98–99, 102–103, 183–184, 187–188). The females are also similar to E. mii in epigynal structure, but can be distinguished by the thicker and longer copulatory ducts (vs. thinner and shorter in E. mii, see Wang & Li 2022: fig. 6B).

Description. Male. Habitus see Figs 89, 91. Carapace length 1.613; abdomen length 1.231. Eye measurements: AME 0.361, ALE 0.255, PME 0.064, PLE 0.204. Leg measurements: I 3.167 (0.940, 0.443, 0.851, 0.512, 0.421), II 2.555 (0.827, 0.392, 0.530, 0.451, 0.355), III 2.816 (0.943, 0.331, 0.563, 0.574, 0.405), IV 3.137 (0.971, 0.355, 0.636, 0.718, 0.457); leg formula: 1432. Color in ethanol: see Lei & Peng (2012). Chelicera (Fig 93): with two teeth on promargin and one tooth on retromargin. Palp (Figs 94–97, 100–101): distal femur and patella with long white setae; embolic disc small, with pronounced flange; embolus tapered, portion between embolus and embolic flange deeply shrunk; cymbial flange extended; RTA tapered.

Female. Habitus see Figs 90, 92. Carapace length 1.830; abdomen length 1.951. Eye measurements: AME 0.419, ALE 0.240, PME 0.058, PLE 0.227. Leg measurements: I 3.038 (0.980, 0.474, 0.702, 0.436, 0.446), II 2.650 (0.914, 0.365, 0.579, 0.407, 0.385), III 3.205 (1.072, 0.411, 0.656, 0.628, 0.438), IV 3.509 (1.121, 0.416, 0.776, 0.791, 0.405); leg formula: 4312. Color in ethanol: similar to that of male, but with fewer white setae on carapace and abdomen. Chelicera as in male. Epigyne (Figs 98–99, 102–103): epigynal window separated by relatively broad median septum; copulatory opening located antero-centrally at margin of epigynal window; copulatory duct relatively thick; spermatheca ovoid.

Remark. We identified this species based on the topotypes and the photograph of the holotype (pers. comm. with Dr. Cheng Wang). Lei & Peng (2012) paired this species based on specimens collected from the same locality. However, two sympatric species of Euochin were found at this site. The genetic distance of COI sequences confirmed the correct pairing of JXZ896 (male) and JXZ897 (female) for E. longyangensis (distance = 0.000). The original female paratype of E. longyangensis belongs to a distinct species, described here as Euochin nu sp. nov., of which the female (JXZ893) and male (JXZ892) pairing was also confirmed (distance = 0.000). The interspecific genetic distance between E. longyangensis and E. nu sp. nov. is 0.106.

Distribution. China (Yunnan).