The first record of Tricholathys Chamberlin & Ivie, 1935 (Araneae, Dictynidae) from China, with a new combination and descriptions of seven new species Author Wang, Lu-Yu https://orcid.org/0000-0002-5250-3473 Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China Author Peng, Xian-Jin https://orcid.org/0000-0002-2614-3910 College of Life Sciences, Hunan Normal University, Changsha 410081, Hunan, China Author Zhang, Zhi-Sheng https://orcid.org/0000-0002-9304-1789 Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China zhangzs327@qq.com text ZooKeys 2023 2023-11-29 1185 255 267 http://dx.doi.org/10.3897/zookeys.1185.107005 journal article http://dx.doi.org/10.3897/zookeys.1185.107005 1313-2970-1185-255 568A472D950D4338A7DF56C6EE473761 DEA7C60064865535B07A16D0F5AC891D Tricholathys chenzhenningi sp. nov. (陈氏毛隐蛛) Figs 1 , 4 , 5 , 16 Type materials. Holotype male : China, Qinghai, Menyuan County, Huangcheng Township, Liuhuanggou, 37°47′50.69″N , 101°16′48.23″E , elev. 3491 m, 13 August 2019, L.Y. Wang and Z.J. Shi leg. (SWUC-T-DI-08-01). Paratypes : 5 males and 5 females (SWUC-T-DI-08-02~11), with same data as holotype; 1 male (SWUC-T-DI-08-12), Qilian County, Ebao Town, Jiangyangling, 37°50′21.27″N , 101°6′47.75″E , elev. 3733 m, L.Y. Wang and Z.J. Shi leg. Etymology. The specific name is a patronym in honor of Prof. Zhenning Chen from Qinghai Normal University in Xining. Diagnosis. The new species is similar to T. ovtchinnikovi ( Marusik et al. 2017 : 258, figs 2E, F, 4G-I, 5A-E, 6J-L) in having the embolus originating at about 7:30 o'clock position, the anterior arm of the conductor tapering gradually and terminating at about 9:30 o'clock , the posterior arm of conductor spiral, distal, and with a small tooth at the center, the copulatory ducts semicircular, the spermathecae spherical, and the fertilization ducts thin and hook-shaped; the new species differs from T. ovtchinnikovi in having the posterior arm of the conductor wide (narrow in T. subnivalis ), the retrolateral tibial apophysis fat and as wide as the tibia (slender in T. subnivalis and narrower than the tibia) (Figs 4A, B , 5C, E-G ), and the copulatory ducts rounded (oval in T. subnivalis ) (Figs 4C, D , 5H-I ). Description. Male (holotype). Habitus as in Fig. 5A . Total length 3.73 (3.40-4.57 in male paratypes). Prosoma 1.77 long, 1.36 wide; opisthosoma 2.12 long, 1.36 wide. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.06, PLE 0.08; AME-AME 0.05, AME-ALE 0.04, PME-PME 0.12, PME-PLE 0.09, ALE-PLE 0.05. MOA 0.20 long, anterior width 0.18, posterior width 0.24. Clypeus height 0.12. Chelicerae with 4 promarginal and 3 retromarginal teeth. Leg measurements: I 4.08 (1.12, 1.55, 0.84, 0.57); II 3.29 (0.95, 1.09, 0.73, 0.52); III 2.92 (0.94, 0.91, 0.63, 0.44); IV 4.26 (1.24, 1.47, 1.00, 0.55). Leg formula: 4123. Figure 5. Tricholathys chenzhenningi sp. nov. A, C-G holotype male B, H, I paratype female A male habitus, dorsal view B female habitus, dorsal view C posterior arm of conductor, ventral view D cribellum, ventral view E left male palp, prolateral view F same, ventral view G same, retrolateral view H epigyne, ventral view I same, dorsal view. Palp (Figs 4A, B , 5C, E-G ). Tip of cymbium with shorter tip and 4 spines. Anterior arm of conductor tapering gradually and terminating at about 9:30 o'clock position; posterior arm with small spine (Fig. 5C, F, G ; 4A, B ). Embolus originating at about 7:30 o'clock position; distal part covered by conductor. Female (paratype). Habitus as in Fig. 5B . Total length 3.84 (3.33-4.72 in other female paratypes). Prosoma 1.74 long, 1.35 wide; opisthosoma 2.37 long, 1.50 wide. Eye sizes and interdistances: AME 0.07, ALE 0.10, PME 0.07, PLE, 0.07; AME-AME 0.07, AME-ALE 0.05, PME-PME 0.11, PME-PLE 0.10, ALE-PLE 0.05. MOA 0.22 long, anterior width 0.20, posterior width 0.25. Clypeus height 0.10. Leg measurements: I 3.78 (1.11, 1.37, 0.75, 0.55); II 3.31 (1.00, 1.12, 0.70, 0.49); III 2.71 (0.81, 0.79, 0.67, 0.44); IV 4.03 (1.17, 1.37, 0.99, 0.50). Leg formula: 4123. Epigyne (Figs 4C, D , 5H, I ). Copulatory openings cochleate, space between them wider than the diameter of the copulatory openings. Weakly sclerotized parts of copulatory ducts S-shaped, and strongly sclerotized part forming almost an entire circle. Spermathecae small, comma-shaped, nearly two times longer than its width. Space between spermathecae slightly narrower than space between copulatory ducts, nearly two times of the width of spermathecae. Distribution. China (Qinghai).