Euochin nanjiabawa, 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 : 356-357

Euochin nanjiabawa sp. nov. (南ůƙẅss)

Figs 104–120

Type material. Holotype: ♁ (MHBU-ARA-00025235), CHINA: Xizang Autonomous Region, Linzhi City, Bayi District , Bayi Town (WBhäLJIJĭffifflflLJŔ͠DZ), 2022.6.4, 29.736903°N, 94.124103°E, 3076 m a.s.l., 4 June 2022, leg. B. Liu. Paratypes: 2♀ (MHBU-ARA-00025236), same data as holotype .

Etymology. The species is named after Mt. Nanjiabawa (also known as Mt. Namcha Barwa); the type locality is at the foot of this mountain. Noun in apposition.

Diagnosis. Males closely resemble Euochin subwanyan in the palpal morphology, but can be distinguished by the embolic flange stretching notably higher along the embolus (vs. obviously lower in E. subwanyan ; cf. Figs 109–112 and Wang & Li, 2020, fig. 5B). Females can be easily distinguished by the anteriorly located epigynal window (Figs 115–116, 119–120; vs. more posteriorly located and partly overlapped with the spermatheca in ventral view, as in E. subwanyan , see Wang & Li, 2020, figs 6A–B). The female epigyne also resembles that of E. lingyi sp. nov. and E. tianhe sp. nov., but the three species can be distinguished by: (1) the shapes of the epigynal windows (wider than long in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while longer than wide in E. lingyi sp. nov.); (2) the distances between the copulatory openings (close to each other in E. lingyi sp. nov. and E. tianhe sp. nov., while far away in E. nanjiabawa sp. nov.); (3) the trajectories of the copulatory ducts (running antero-laterally from the spermatheca in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while running posteriorly in E. lingyi sp. nov.); (4) the sizes of the fertilization ducts (much larger in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while smaller in E. lingyi sp. nov.) (cf. Figs 83–84 , 87–88 , 115–116, 119–120, 164–165, 168–169).

Description. Male. Habitus see Figs 104,106 .Carapace length 2.095; abdomen length 1.721. Eye measurements:

AME 0.376, ALE 0.235, PME 0.065, PLE 0.220. Leg measurements: I 3.803 (1.224, 0.587, 0.920, 0.599, 0.473), II 3.285 (1.067, 0.485, 0.788, 0.546, 0.399), III 3.547 (1.190, 0.512, 0.712, 0.722, 0.411), IV 4.027 (1.253, 0.510, 0.877, 0.926, 0.461); leg formula: 4132. Color in ethanol: carapace dark brown, covered with yellowish setae. Abdomen dark, with yellow and brown bands. Chelicera ( Fig. 108 ) with two promarginal and one retromarginal teeth. Palp (Figs 109–112, 117–118): distal femur and patella with long white setae; embolic disc obvious but relatively small, partly hidden by tegulum in ventral view; embolus tapered, with blunt embolic flange ventrally; cymbial flange notably extended; RTA tapered, with small laminate process dorsally.

Female. Habitus see Figs 105, 107 . Carapace length 1.794; abdomen length 2.496. Eye measurements: AME 0.393, ALE 0.232, PME 0.083, PLE 0.228. Leg measurements: I 2.825 (0.967, 0.345, 0.711, 0.435, 0.367), II 2.622 (0.908, 0.375, 0.591, 0.398, 0.350), III 2.995 (0.982, 0.361, 0.636, 0.616, 0.400), IV 3.722 (1.232, 0.427, 0.771, 0.822, 0.520); leg formula: 4312. Color in ethanol: like that of male. Chelicera as in male. Epigyne (Figs 114–116, 119–120): epigynal window wider than long, with narrow median septum; copulatory opening located at posterior margin of epigynal window; copulatory duct running antero-laterally to copulatory opening, with obvious accessory gland; spermatheca ovoid, with top joining large fertilization duct.

Distribution. China (Xizang).

Figures

FIGURES 104–108. Euochin nanjiabawa sp. nov., holotype male (104, 106, 108) and paratype female (105, 107). 104–105. Habitus, in dorsal view; 106–107. Carapace, in frontal view; 108. Left male chelicera.

FIGURES 117–120. Genitalia of Euochin nanjiabawa sp. nov.. 117. Left male palp of holotype, in ventral view; 118. RTA, in retrolateral view; 119–120. Epigyne of paratype, in ventral (119) and dorsal (120) view.

FIGURES 80–84. Genitalia of Euochin lingyi sp. nov.. 80–82. Left male palp of holotype, in prolateral (80), ventral (81) and retrolateral (82) view; 83–84. Epigyne of paratype, in ventral (83) and dorsal (84) view.

FIGURES 85–88. Genitalia of Euochin lingyi sp. nov.. 85. Left male palp of holotype, in ventral view; 86. RTA, in retrolateral view; 87–88. Epigyne of paratype, in ventral (87) and dorsal (88) view.