Cornifronus simplex Jin & Zhang, sp. nov. (DZẠĦĸu) Figs 1–5 Type material. Holotype ♁, CHINA: Hainan Province, Lingshui County, Diaoluo Mountain National Nature Reserve Administration, roadside, 29 January 2015, leg. C. Jin, X. Guo, L. Fu and B. Zhang. Paratypes: CHINA: Hainan Province: 8♀ 2♁, same data as holotype; 1♀ 2♁, Lingshui County, near the Diaoluo Mountain National Nature Reserve Administration, 27 January 2015, leg. C. Jin; 8♀ 4♁, Ledong County, Jianfengling National Forest Park, 1 February 2015, leg. C. Jin, X. Guo, L. Fu & B. Zhang. Yunnan Province: 1♀, Dehong Prefecture, Yingjiang County, Fenghuang Mountain, 20 July 2014, leg. P. Wu; 1♀, Mengla County, Xishuangbanna Tropical Botanical Garden east tour area (21.92364°N, 101.262012°E), 540 m a.s.l., 14 May 2017, leg. B. Zhou and X. Zang. Etymology. The specific name is from the Latin word simplex, meaning “simple”, and refers to the simple genital structure of this species. Diagnosis. See the generic diagnosis above. Description. Male (Figs 1E–H, 2, 3C–E, 4A–C). Total length 1.65–1.90 (n = 7). Holotype: body length 1.71; carapace 0.91 long, 0.63 wide, width/length = 0.69; abdomen 0.80 long, 0.59 wide. Eye diameters: AME 0.04, ALE 0.06, PME 0.05, PLE 0.05. Eye interdistances: AME–AME 0.05, AME–ALE 0.01, ALE–ALE 0.12, PME–PME 0.04, PME–PLE 0.05, PLE–PLE 0.24, ALE–PLE 0.06. OAW 0.32, CRW 0.36, OAW/CRW = 0.89. CRW/carapace width = 0.22. MOA 0.13 long, front width 0.10, back width 0.15. Clypeus height 0.08, 2x AME diameter. Chelicerae with three promarginal and two retromarginal teeth. Labium 0.12 long, 0.15 wide. Sternum 0.51 long, 0.44 wide. Leg measurements: leg I 2.01 (0.58 + 0.21 + 0.51 + 0.43 + 0.28), II 1.74 (0.49 + 0.20 + 0.39 + 0.37 + 0.29), III 1.61 (0.45 + 0.17 + 0.34 + 0.37 + 0.28), IV 2.13 (0.57 + 0.20 + 0.46 + 0.58 + 0.32). Leg formula: 4123. Females (Figs 1A–D, 3A–B, 4D–E). Total length 2.12–2.43 (n = 19). One paratype: body length 2.32; carapace 1.15 long, 0.76 wide, width/length = 0.66; abdomen 1.17 long, 0.98 wide. Eye diameters: AME 0.05, ALE 0.06, PME 0.06, PLE 0.07. Eye interdistances: AME–AME 0.02, AME–ALE 0.01, ALE–ALE 0.15, PME–PME 0.06, PME–PLE 0.06, PLE–PLE 0.29, ALE–PLE 0.07. OAW 0.40, CRW 0.46, OAW/CRW = 0.87. CRW/carapace width = 0.61. MOA 0.14 long, front width 0.13, back width 0.18. Clypeus height 0.12, 2.4x AME diameter. Labium 0.15 long, 0.15 wide. Sternum 0.53 long, 0.39 wide. Measurements of legs: leg I 2.50 (0.73 + 0.27 + 0.65 + 0.54 + 0.31), II 2.16 (0.63 + 0.25 + 0.49 + 0.49 + 0.30), III 2.00 (0.55 + 0.23 + 0.41 + 0.49 + 0.32), IV 2.60 (0.71 + 0.25 + 0.55 + 0.72 + 0.37). Leg formula: 4123. Leg spination: tibiae: I plv 6 rlv 5, II plv 6/5 rlv 5/4 (female/male); metatarsi: I–II plv 4 rlv 4; tarsus: I–II plv 3 rlv 2. Male palp (Figs 3C–E, 4A–C) and female genitalia (Figs 3A–B, 4D–E) as in the generic description. Distribution. China (Yunnan, Hainan) (Fig. 5).

Published as part of Jin, Chi, Li, Liangtao & Zhang, Feng, 2024, Cornifronus gen. nov., a new dark sac spider genus from China (Araneae: Trachelidae), pp. 392-400 in Zootaxa 5415 (3) on page 398, DOI: 10.11646/zootaxa.5415.3.2, http://zenodo.org/record/10693197