Euochin Prószyński, 2018

Wang, Weihang & Zhang, Junxia, 2023, On fourteen species of Euochin Prószyński, 2018 from China (Araneae: Salticidae: Euophryini), Zootaxa 5297 (3), pp. 337-379 : 339-340

Genus Euochin Prószyński, 2018

Euochin Prószyński , in Prószyński, Lissner & Schäfer, 2018: 55, figs 19, 20; Logunov, 2020: 525, figs 11–17; Wang & Li, 2021: 127 , figs 2A–D, 3A–G; Wang & Li 2022: 93 , figs 5A–D, 6A–G, 7A–G.

Type species. Euophrys atrata Song & Chai, 1992, by original designation.

Diagnosis. Modified from Logunov (2020): similar to Euophrys (s. str., see Logunov 1997) in body shape and genitalia, but can be distinguished by: (1) the more robust RTA of the male palp (e.g., Fig. 26 ; vs. seta-like RTA in Euophrys ); (2) the presence of a long and light-colored setal tuft on the male palp (e.g., Fig. 136 ; vs. usually absent in Euophrys ); (3) the relatively short and broad embolus (e.g., Fig. 12 ; vs. thread-like embolus in Euophrys ); (4) the embolic disc slightly concaved centrally or highly reduced, usually slightly hidden by the apical edge of the tegulum (e.g., Figs 12 , 61 , see Liu et al. 2020: figs 1B–D; vs. embolic disc highly developed and exposed in Euophrys ); (5) the tip of the embolus raised above the plane of the embolic disc (e.g., Fig. 12 ; vs. the embolus almost within the plane of embolic disc in Euophrys ); (6) the relatively short copulatory duct (e.g., Fig. 14 ; vs. much longer copulatory duct in Euophrys ); (7) the spermatheca usually visible through epigynal window, except in Euochin bamianshanensis ( Liu, Wang & Peng, 2020) comb. nov. (see Liu et al. 2020: figs 2B–C), E. extraculum sp. nov. ( Figs 65 , 69 ), E. nanjiabawa sp. nov. (Figs 115, 119) and E. tianhe sp. nov. ( Figs 164 , 168 ; vs. spermatheca usually lower than the posterior edge of epigynal window in Euophrys ).

Description. Small and compact jumping spiders (total length 2.58–3.86 in males; 2.93–4.28 in females). Body generally dark (especially in males), both sexes with white to light-yellow setae forming scattered stripes and patches around the body (e.g., Figs 51–54 ), making these spiders reminiscent of Chinattus Logunov, 1999 and Nannenus Simon, 1902 . Promargin of chelicera with two teeth, retromargin with one simple tooth or compound tooth with multiple cusps (e.g., Figs 211–212 ). Male palps with light-colored setal tuft (e.g., Fig. 52 ); RSDL visible in ventral view (e.g., Fig. 10 ); RTA developed (e.g., Fig. 11 ). Female epigynal windows variable in size and position, but usually overlapping with the spermathecae in ventral view (e.g., Fig. 13 ); copulatory ducts short, some species with obvious accessory glands near the copulatory openings (e.g., Fig. 14 ); spermathecae ovoid to nearly globular (e.g., Fig. 14 ); fertilization ducts variable in size (e.g., Figs 84 , 116).

Remark. The morphological characters of Euophrys bamianshanensis Liu, Wang & Peng, 2020 and E. longyangensis Lei & Peng, 2012 match the above diagnoses of Euochin , and both species have: (1) the long setal tuft on the male palps ( Fig. 91 , see Liu et al. 2020); (2) the embolus that is elevated above the plane of the embolic disc ( Fig. 97 , see Liu et al. 2020: fig. 1C); (3) the developed RTA; as well as (4) the relatively short copulatory duct. In addition, the female epigynal window of Euophrys longyangensis overlaps with the spermatheca in ventral view, which also fits the diagnosis of Euochin . Therefore, we transfer these two species here from Euophrys to Euochin .

Biology. Most of the known species are leaf-litter dwellers. All of the specimens examined in this study were collected by sieving leaf litter on the forest floor in mountainous areas.

Distribution. China, Micronesia ( Caroline Islands), Philippines, Vietnam.

Figures

FIGURES 24–30. Genitalia of Euochin buziji sp. nov.. 24–26. Left male palp of holotype, in prolateral (24), ventral (25) and retrolateral (26) view; 27. Detail of embolus; 28. Inflated bulb; 29–30. Epigyne of paratype, in ventral (29) and dorsal (30) view.

FIGURES 135–138. Living spiders of Euochin shenjun sp. nov.. 135–136. Holotype male; 137–138. Paratype female.

FIGURES 9–14. Genitalia of Euochin bethunei sp. nov.. 9–11. Left male palp of holotype, in prolateral (9), ventral (10) and retrolateral (11) view; 12. Detail of embolus; 13–14. Epigyne of paratype, in ventral (13) and dorsal (14) view.

FIGURES 60–66. Genitalia of Euochin extraculum sp. nov.. 60–62. Left male palp of holotype, in prolateral (60), ventral (61) and retrolateral (62) view; 63. Inflated bulb; 64. Detail of embolus (© Kun Yu); 65–66. Epigyne, in ventral (65) and dorsal (66) view.

FIGURES 67–70. Genitalia of Euochin extraculum sp. nov.. 67. Left male palp of holotype, in ventral view; 68. RTA, in retrolateral view; 69–70. Epigyne of paratype, in ventral (69) and dorsal (70) view.

FIGURES 159–165. Genitalia of Euochin tianhe sp. nov.. 159–161. Left male palp of holotype, in prolateral (159), ventral (160) and retrolateral (161) view; 162. Detail of embolus; 163. Detail of copulatory duct; 164–165. Epigyne of paratype, in ventral (164) and dorsal (165) view.

FIGURES 166–169. Genitalia of Euochin tianhe sp. nov.. 166. Left male palp of holotype, in ventral view; 167. RTA, in retrolateral view; 168–169. Epigyne of paratype, in ventral (168) and dorsal (169) view.

FIGURES 51–54. Living spiders of Euochin extraculum sp. nov.. 51–52. Holotype male; 53–54. Paratype female.

FIGURES 208–212. Euochin zegangi sp. nov., holotype male (208, 210–211) and paratype female (209, 212). 208–209. Habitus, in dorsal view; 210. Male carapace, in frontal view; 211–212. Left chelicera.

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 89–93. Topotypes of Euochin longyangensis (Lei & Peng, 2012) comb. nov., male (89, 91, 93) and female (90, 92). 89–90. Habitus, in dorsal view; 91–92. Carapace, in frontal view; 93. Left male chelicera.

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.