Spilosynema motuo 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
Spilosynema
Spilosynema motuo

description: Spilosynema motuo Wang, Lu & Zhang sp. nov.
Figs 2 D, 3 I – J, 9, 11
Type material.
Holotype • ♂ (SWUC -T-THO-05-01), China, Xizang, Medog County, Beibeng Township, 29°14.87'N, 95°11.02'E, elev. 924 m, 19 December 2023, Z. S. Zhang, L. Y. Wang, Q. L. Lu and Y. N. Mu leg. Paratypes: • 1 ♀ (SWUC -T-THO-05-02), 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. • 1 ♀ (SWUC -T-THO-05-03), Dexing Township, Guoguotang, 29°19.560'N, 95°16.360'E, elev. 1025 m, 29 June 2018, L. Y. Wang, Y. N. Mu and Z. S. Wu leg. • 1 ♀ (SWUC -T-THO-05-04), Beibeng Township, Bayang Village, 29°12'49"N, 95°5'43"E, elev. 738 m, 7 July 2023, Z. S. Zhang, L. Y. Wang, Q. L. Lu and X. L. Chen leg. • 1 ♀ (SWUC -T-THO-05-05), Beibeng Township, Badeng Village, 29°16'28"N, 95°10'7"E, elev. 851 m, 7 July 2023, Z. S. Zhang, L. Y. Wang, Q. L. Lu and X. L. Chen leg. • 3 ♀ (SWUC -T-THO-05-06 ~ 08), 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.
Etymology.
The specific name is derived from the type locality (medog = motuo); it is a noun in apposition.
Diagnosis.
The male of this new species resembles S. comminum Tang & Li, 2010 (Tang and Li 2010: 70, figs 52 A – D, 54 A, B) in the bulb of the same shape and the embolus origin in the same position, but it differs from the latter by the absence of an intermedial tibial apophysis (vs presence in S. comminum), the conical tutacular apophysis (vs hook-shaped in S. comminum) (Fig. 9 A, B). The female of this new species can be distinguished from all other Spilosynema species in having the epigynal plate with a hood.
Description.
Male holotype (Fig. 3 I) total length 4.20. Prosoma 2.12 long, 1.98 wide; Opisthosoma 2.18 long, 1.65 wide. Carapace yellow brown. Eye sizes and interdistances: AME 0.11, ALE 0.21, PME 0.09, PLE 0.15; AME – AME 0.19, AME – ALE 0.18, PME – PME 0.23, PME – PLE 0.34, ALE – PLE 0.26. MOA 0.45 long, anterior width 0.40, posterior width 0.40. Clypeus height 0.19. Chelicerae brown, with 2 promarginal and 2 retromarginal teeth. Labium and endites brown, longer than wide. Sternum brown and scutellate, with brown hairs. Leg measurements: I 10.49 (2.89, 3.53, 2.64, 1.43); II 10.38 (2.88, 3.59, 2.55, 1.36); III 5.47 (1.72, 1.99, 0.98, 0.78); IV 5.96 (1.99, 2.11, 1.11, 0.75). Leg formula: 1243. Opisthosoma oval, yellow-brown, with a scaly spot. Spinnerets brown.
Palp (Fig. 9 A, B). Tibia as long as wide. Ventral tibial apophysis strong, tip slightly hooked. Retrolateral tibial apophysis curved and strongly sclerotized. Cymbium base with two apophyses. Bulb flat. Embolus filiform, originating at approximately 8 - o’clock position, curved along with bulb, tip staying in cymbial furrow.
Female paratype (SWUC -T-THO-05-02, Fig. 3 J) total length 5.23. Prosoma 2.28 long, 2.18 wide; opisthosoma 2.93 long, 2.58 wide. Eye sizes and interdistances: AME 0.11, ALE 0.22, PME 0.10, PLE 0.14; AME – AME 0.25, AME – ALE 0.20, PME – PME 0.30, PME – PLE 0.44, ALE – PLE 0.35. MOA 0.45 long, anterior width 0.49, posterior width 0.53. Clypeus height 0.24. Leg measurements: I 10.10 (2.97, 3.64, 2.28, 1.21); II 9.98 (3.02, 3.49, 2.29, 1.18); III 5.10 (1.55, 1.90, 0.98, 0.67); IV 5.58 (1.82, 1.92, 1.10, 0.74). Leg formula: 1243.
Epigyne (Fig. 9 C, D). Epigynal plate wider than long, with a hood at middle. Copulatory openings slit-like, distant from each other. Copulatory ducts S-like. Spermathecae peanut-shaped. Fertilization ducts crescent-shaped.
Variation.
Females (n = 7) total length 5.23–5.93.
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