Sinothomisus dawai Wang, Lu & Zhang 2024, sp. nov.
Creators: name: Wang, Lu-Yu
name: Mu, Yan-Nan
name: Lu, Qian-Le
name: Xu, Yong-Qiang
name: Bu, Hai-Tao
name: Zhang, Feng
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Thomisidae
Sinothomisus
Sinothomisus dawai

description: Sinothomisus dawai Wang, Lu & Zhang sp. nov.
Figs 2 B, C, 3 G, H, 8, 11
Type material.
Holotype • ♂ (SWUC -T-THO-04-01), China, Xizang, Medog County, Mirage Observation Deck, 29°20'36"N, 95°20'43"E, elev. 1297 m, 8 July 2023, Z. S. Zhang, L. Y. Wang, Q. L. Lu and X. L. Chen leg. Paratypes: • 1 ♂ (SWUC -T-THO-04-02), same data as for holotype; • 1 ♀ (SWUC -T-THO-04-03), Beibeng Township, Damu, 29°14'51"N, 95°11'1"E, elev. 924 m, 28 June 2018, L. Y. Wang, Y. N. Mu and Z. S. Wu leg.
Etymology.
The specific name is a patronym in honor of Mr. Dawa from the Tibet Plateau Institute of Biology in Lhasa, Xizang.
Diagnosis.
The new species resembles S. beibeng Wang, Lu & Zhang, sp. nov. (Fig. 7) in having same shaped bulb and same position of embolus origin, but differs from the latter by the long and large retrolateral tibial apophysis (vs short and C-like in S. beibeng), the small spine between the retrolateral tibial apophysis and the dorsal tibial apophysis (vs absent in S. beibeng), the fingernail-like protuberance at epigynal plate (vs absent in S. beibeng) (Fig. 8).
Description.
Male holotype (SWUC -T-THO-04-01, Figs 2 B, 3 G) total length 4.21. Prosoma 2.19 long, 2.04 wide; Opisthosoma 2.34 long, 1.92 wide. Carapace border black, with a large deep brown spot in the middle. Eye sizes and interdistances: AME 0.07, ALE 0.18, PME 0.01, PLE 0.16; AME – AME 0.24, AME – ALE 0.21, PME – PME 0.24, PME – PLE 0.45, ALE – PLE 0.21. MOA 0.24 long, anterior width 0.37, posterior width 0.29. Clypeus height 0.18. Chelicerae brown. Labium and endites brown, longer than wide. Sternum brown and scutellate, with brown hairs. Leg measurements: I 8.40 (2.54, 3.04, 1.58, 1.24); II 8.52 (2.62, 3.07, 1.63, 1.20); III 5.42 (1.81, 1.98, 0.91, 0.72); IV 5.34 (1.70, 1.99, 0.95, 0.70). Leg formula: 2134. Opisthosoma oval, yellow, with black spot. Spinnerets brown.
Palp (Fig. 8 A, B). Tibia as long as wide. Ventral tibial apophysis small, thumb shaped, closing to retrolateral tibial apophysis. Retrolateral tibial apophysis middle part bulging, with a hook end. Dorsal tibial apophysis small, cone-shaped. A spine-like tubercle between retrolateral tibial apophysis and dorsal tibial apophysis. Bulb flat, apical tegular apophysis nail-shaped. Embolus filiform, originating at approximately 6 - o’clock position, curved along with bulb, tip staying in cymbial furrow.
Female paratype (SWUC -T-THO-04-03, Fig. 3 H) total length 5.59. Prosoma 2.28 long, 2.25 wide; opisthosoma 3.10 long, 2.61 wide. Eye sizes and interdistances: AME 0.08, ALE 0.18, PME 0.02, PLE 0.15; AME – AME 0.28, AME – ALE 0.25, PME – PME 0.25, PME – PLE 0.54, ALE – PLE 0.25. MOA 0.26 long, anterior width 0.46, posterior width 0.33. Clypeus height 0.22. Leg measurements: I 7.00 (2.19, 2.56, 1.30, 0.95); II 7.35 (2.30, 2.79, 1.28, 0.98); III 5.05 (1.65, 1.90, 0.76, 0.74); IV 4.84 (1.44, 1.86, 0.84, 0.70). Leg formula: 2134.
Epigyne (Fig. 8 C, D). Epigynal plate wider than long, with a fingernail-like protuberance at middle part. Copulatory openings slit like, far away from each other. Copulatory ducts S-like. Spermathecae C-shaped. Fertilization ducts crescent.
Variation.
Males (n = 2) total length 4.21–5.17.
Distribution.
China (Xizang, Medog) (Fig. 11).
description: Published as part of Wang, Lu-Yu, Mu, Yan-Nan, Lu, Qian-Le, Xu, Yong-Qiang, Bu, Hai-Tao, Zhang, Feng & Zhang, Zhi-Sheng, 2024, Description of six new crab-spider species and first description of the male of Pharta xizang Liu & Yao, 2023 from Medog, Xizang, China (Araneae, Thomisidae), pp. 195-213 in ZooKeys 1217 on pages 195-213, DOI: 10.3897/zookeys.1217.127555