Trilacuna jinyun Tong, Zhang & Li 2021
- Dataset
- Two new species of the genus Trilacuna (Araneae: Oonopidae) from Jinyun Mountain of Chongqing, China
- Rank
- SPECIES
- Published in
- Huang, Ying, Bian, Dong-Ju, Tong, Yan-Feng, Zhang, Zhi-Sheng, Li, Shu-Qiang (2021): Two new species of the genus Trilacuna (Araneae: Oonopidae) from Jinyun Mountain of Chongqing, China. European Journal of Taxonomy 748: 1-14, DOI: 10.5852/ejt.2021.748.1337, URL: http://dx.doi.org/10.5852/ejt.2021.748.1337
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Araneae
- family
- Oonopidae
- genus
- Trilacuna
- species
- Trilacuna jinyun
description
Description Male (holotype) BODY. Yellow; habitus as in Fig. 1 A – C; body length 2.39. Carapace (Fig. 1 D, F – G): 1.23 long, 0.97 wide; sides granulate; lateral margin rebordered. EYES (Fig. 1 A, G). Well developed, arranged in a compact group; ALE, PME and PLE subequal; ALE – PLE separated by less than ALE radius, PME touching each other; posterior row recurved from above, procurved from front. CLYPEUS (Fig. 1 G). Sinuous in frontal view, ALE separated from edge of carapace by about 1.8 times their diameter. MOUTHPARTS (Fig. 1 E, G). Chelicerae straight; labium rectangular, anterior margin deeply incised; endites slender, distally strongly curved branched. STERNUM (Fig. 1 E). With radial furrows between coxae I – II, II – III, III – IV; surface medially strongly rugose. ABDOMEN (Fig. 1 A – C). Abdomen 1.30 long, 0.92 wide; booklung covers ovoid, surface smooth; dorsal scutum not fused to epigastric scutum; apodemes present, posterior spiracles connected by a shallow groove; sperm pore oval, situated between anterior spiracles. LEG SPINATION (all spines longer than segment width). Legs I – II: tibia: v 2 - 2 - 2 - 2 - 0, metatarsus: v 2 - 2 - 0. PALP (Figs 2, 4 A – B). Orange; 0.67 long (0.21, 0.12, 0.17, 0.17); femur greatly swollen (width / length = 0.67); bulb oval, tapering apically; embolus system (Fig. 2 C – H) with a broad dorsal branch (db), a very narrow thread-like ventral branch (vb), and a broad anterior branch (ab) in prolateral view, a flag like protrusion (flp) in dorsal view, and a circular projection (cp) in retrolateral view. Female (SYNU- 292) Same as male except as noted; slightly larger than male. Body: length 2.44; habitus as in Fig. 3 A – C. Carapace: 1.02 long, 0.89 wide. Endites: unmodified. Abdomen: 1.53 long, 0.98 wide. Epigaster (Figs 3 B, 4 E): middle part of posterior margin of epigastric scutum (pe) much extended posteriorly, with sclerotized recurved arches (sar) between posterior spiracles (psp). Endogyne (Fig. 4 F): with a rectangular shaped structure (rss), at the posterior end of the rectangular shaped structure is a slender line-like structure (sls) extending anteriorly; with two lateral apodemes (ap).
description
urn: lsid: zoobank. org: act: 7 B 177 C 33 - 6884 - 40 B 3 - BB 08 - A 61 DFACE 5190 Figs 1 – 3, 4 A – B, E – F, 8
diagnosis
Differential diagnosis This new species is similar to Trilacuna simianshan Tong & Li, 2018, but males can be distinguished by the large flag like protrusion and the broad dorsal branch of embolus system (Fig. 2 E, F, H), and females by the rectangular shaped structure of endogyne (Fig. 4 F). Males of T. simianshan have a rectangular projection and narrow dorsal branch of embolus system, and females have a cone-shaped structure of endogyne (Tong et al. 2018: figs 3 a – f, 5 i).
distribution
Distribution China (Chongqing) (Fig. 8).
etymology
Etymology The specific name is a noun in apposition and refers to the type locality.
materials_examined
Material examined Holotype CHINA • ♂; Chongqing Municipality, Beibei District, Jinyun Mountain, Caijiagou; 12 Oct. 2008; Zhisheng Zhang et al. leg.; SYNU- 291. Paratypes CHINA • 4 ♀♀; same collection data as for holotype; SYNU- 292 to 295 • 1 ♂; Jinyun Mountain, Canal Protection Station; 4 Dec. 2010; Zhong Li and Zongxu Li leg.; SWUC-T-OO- 01 - 1 • 3 ♀♀; Jinyun Mountain; 12 Apr. 2010; Luyu Wang leg.; SWUC-T-OO- 01 - 2 to 4.