Euochin nu sp. nov, 2018

Wang, Weihang & Zhang, Junxia, 2023, On fourteen species of Euochin Prószyński, 2018 from China (Araneae: Salticidae: Euophryini), Zootaxa 5297 (3), pp. 337-379 : 358-359

Euochin nu sp. nov . (ŏƙẅss)

Figs 121–134

Euophrys longyangensis Lei & Peng, 2012: 2 , figs 1b, 5d–e (♀ only, mismatched).

Type material. Holotype: ♁ (MHBU-ARA-00025237), 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. Paratypes: 1♁ 2♀ (MHBU-ARA-00025238), same data as holotype .

Etymology. The specific epithet is derived from the Nu people (ŏá), a minority nationality living in western Yunnan for generations. Noun in apposition.

Diagnosis. Males closely resemble Euochin nanjiabawa sp. nov., E. subwanyan and E. yaoi in the male palp, but can be easily distinguished by the presence of striking retrolateral patellar extension ( Figs 127–128 , 131 ; absent in E. yaoi , verified by examining the topotype). Females can be distinguished by the more anterior position of the epigynal window and copulatory opening (vs. situated more posteriorly in E. yaoi , see Wang & Li 2021: fig. 3A).

Description. Male. Habitus see Figs 121, 123 . Carapace length 1.915; abdomen length 1.775. Eye measurements: AME 0.411, ALE 0.289, PME 0.075, PLE 0.241. Leg measurements: I 3.783 (1.130, 0.471, 1.003, 0.700, 0.479), II 3.167 (0.890, 0.438, 0.618, 0.762, 0.459), III 3.626 (1.240, 0.463, 0.729, 0.767, 0.427), IV 3.744 (1.137, 0.436, 0.793, 0.884, 0.494); leg formula: 1432. Color in ethanol: carapace dark brown, covered with yellow and white setae. Abdomen dark brown, with yellowish-white bands and patches. Chelicera ( Fig. 125 ) with two promarginal and one retromarginal teeth. Palp ( Figs 126–128 , 131–132 ): distal femur and patella with long white setae; embolic disc relatively small, partly hidden by tegulum in ventral view; embolus tapered, with blunt embolic flange ventrally; cymbial flange notably extended; RTA finger-like; patella with large extension retrolaterally.

Female. Habitus see Figs 122, 124 . Carapace length 1.549; abdomen length 1.791. Eye measurements: AME 0.418, ALE 0.251, PME 0.069, PLE 0.210. Leg measurements: I 2.526 (0.802, 0.356, 0.609, 0.413, 0.346), II 2.373 (0.840, 0.378, 0.462, 0.369, 0.324), III 2.904 (0.979, 0.331, 0.620, 0.584, 0.390), IV 3.256 (1.066, 0.378, 0.654, 0.723, 0.435); leg formula: 4312. Color in ethanol: similar to that of male, but darker in coloration. Chelicera as in male. Epigyne ( Figs 129–130 , 133–134 ): epigynal window nearly obtuse rectangular; margin of epigynal window blurred; copulatory opening located at posterior margin of epigynal window; copulatory duct notably short; spermatheca globular, with central inner part jointing large fertilization duct.

Remark. The female of the new species was originally paired with the holotype male of Euochin longyangensis comb. nov. (see Lei & Peng 2012), but the genetic distance of COI sequences confirmed the correct pairing of its male and showed that it is a distinct species from E. longyangensis (see details in the remark of E. longyangensis ).

Distribution. China (Yunnan).

Figures

FIGURES 121–125. Euochin nu sp. nov., holotype male (121, 123, 125) and paratype female (122, 124). 121–122. Habitus, in dorsal view; 123–124. Carapace, in frontal view; 125. Left male chelicera.

FIGURES 126–130. Genitalia of Euochin nu sp. nov.. 126–128. Left male palp of holotype, in prolateral (126), ventral (127) and retrolateral (128) view; 129–130. Epigyne of paratype, in ventral (129) and dorsal (130) view.

FIGURES 131–134. Genitalia of Euochin nu sp. nov.. 131. Left male palp of holotype, in ventral view; 132. RTA, in retrolateral view; 133–134. Epigyne of paratype, in ventral (133) and dorsal (134) view.