Euochin wanlessi, Wang & Zhang, 2023

Wang, Weihang & Zhang, Junxia, 2023, On fourteen species of Euochin Prószyński, 2018 from China (Araneae: Salticidae: Euophryini), Zootaxa 5297 (3), pp. 337-379 : 365-366

Euochin wanlessi sp. nov. ‹hfflƙŵff›

Figs 170–188

Type material. Holotype: ♁ (MHBU-ARA-00025221), CHINA: Yunnan Province, Xishuangbanna, Menghai County, Aluxinzhai (ḃāḿē), 21.869847°N, 100.460790°E, 1581 m a.s.l., 11 June 2022, leg. L. Zhang, W. Wang, M. Xu & Z. Yang. Paratypes: 2♁ 2♀ (MHBU-ARA-00025222), same data as holotype .

Etymology. The specific epithet is in honor of Dr. Fred R. Wanless (1940–2017), who contributed extraordinarily to the taxonomy and comparative morphology of jumping spiders.

Diagnosis. Both sexes closely resemble Euochin longyangensis comb. nov. in genitalic structure. Males of these two species can be recognized by: (1) the portion between the embolic flange and the embolus deeply depressed in E. longyangensis comb. nov., while not depressed in E. wanlessi sp. nov., and (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 female of the new species is also similar to E. mii in the epigynal structure, but can be distinguished by the thicker and longer copulatory duct (vs. thinner and shorter in E. mii , see Wang & Li 2022: fig. 6B). The females of the new species also share genitalic similarities with E. subwanyan , but can be distinguished by the obviously smaller epigynal window ( Figs 183 , 187 , vs. larger epigynal windows in E. subwanyan , see Wang & Li 2020a: figs 6A–B).

Description. Male. Habitus see Figs 170–171 , 174, 176 . Carapace length 1.610; abdomen length 1.362. Eye measurements: AME 0.360, ALE 0.235, PME 0.055, PLE 0.196. Leg measurements: I 3.281 (1.031, 0.477, 0.777, 0.599, 0.397), II 2.417 (0.809, 0.358, 0.482, 0.398, 0.370), III 2.590 (0.913, 0.302, 0.537, 0.545, 0.293), IV 2.800 (0.933, 0.336, 0.610, 0.584, 0.337); leg formula: 1432. Color in ethanol: carapace dark brown, with white setae. Abdomen yellowish-brown, with light yellowish-white bands and spots. Chelicera ( Fig. 178 ) with two promarginal and one retromarginal teeth. Palp ( Figs 179–182 , 185–186 ): distal femur and patella covered with long white setae; embolic disc slightly concaved centrally, plane of disc nearly facing ventrally; embolus straight and pointed, with longitudinal ridge medially, and with relatively small flange; cymbial flange marked; RTA tapered.

Female. Habitus see Figs 172–173 , 175, 177 . Carapace length 1.607; abdomen length 2.104. Eye measurements: AME 0.346, ALE 0.228, PME 0.070, PLE 0.207. Leg measurements: I 2.567 (0.832, 0.398, 0.661, 0.342, 0.334), II 2.337 (0.794, 0.344, 0.478, 0.420, 0.301), III 2.886 (1.036, 0.381, 0.542, 0.503, 0.424), IV 3.292 (1.044, 0.353, 0.701, 0.653, 0.541); leg formula: 4312. Color in ethanol: similar to that of male, but lighter in coloration. Chelicera as in male. Epigyne ( Figs 183–184 , 187–188 ): epigynal window separated by broad median septum; copulatory opening located interiorly on edge of median septum; copulatory duct connected centrally to inner rim of spermatheca; spermatheca ovoid, evidently larger than epigynal window in ventral view.

Distribution. China (Yunnan).

Figures

FIGURES 170–173. Living spiders of Euochin wanlessi sp. nov.. 170–171. Holotype male; 172–173. Paratype female.

FIGURES 174–178. Euochin wanlessi sp. nov., holotype male (174, 176, 178) and paratype female (175, 177). 174–175. Habitus, in dorsal view; 176–177. Carapace, in frontal view; 178. Left male chelicera.

FIGURES 179–184. Genitalia of Euochin wanlessi sp. nov.. 179–181. Left male palp of holotype, in prolateral (179), ventral (180) and retrolateral (181) view; 182. Detail of embolus; 183–184. Epigyne of paratype, in ventral (183) and dorsal (184) view.

FIGURES 185–188. Genitalia of Euochin wanlessi sp. nov.. 185. Left male palp of holotype, in ventral view; 186. RTA, in retrolateral view; 187–188. Epigyne, in ventral (187) and dorsal (188) view.

FIGURES 94–99. Genitalia of topotypes of Euochin longyangensis (Lei & Peng, 2012) comb. nov.. 94–96. Left male palp, in prolateral (94), ventral (95) and retrolateral (96) view; 97. Detail of embolus; 98–99. Epigyne, in ventral (98) and dorsal (99) view.

FIGURES 100–103. Genitalia of Euochin longyangensis (Lei & Peng, 2012) comb. nov.. 100. Left male palp, in ventral view; 101. RTA, in retrolateral view; 102–103. Epigyne, in ventral (102) and dorsal (103) view.