Trilacuna wenfeng Wang, Tong, Bian, and Li 2021
- Dataset
- Two new species of the genus Trilacuna from Chongqing Municipality, China (Araneae, Oonopidae)
- Rank
- SPECIES
- Published in
- Wang, Ying, Tong, Yanfeng, Bian, Dongju, Li, Shuqiang (2021): Two new species of the genus Trilacuna from Chongqing Municipality, China (Araneae, Oonopidae). Zootaxa 4927 (3): 431-443, DOI: 10.11646/zootaxa.4927.3.6
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Araneae
- family
- Oonopidae
- genus
- Trilacuna
- species
- Trilacuna wenfeng
description
Description. Male (holotype, SYNU- 274). Body yellow, chelicerae and sternum lighter. Habitus as in Fig. 6 A, C, E. Body length 1.44; carapace 0.67 long, 0.57 wide; abdomen 0.77 long, 0.50 wide. Carapace sides granulate; lateral margin rebordered. Six eyes, well developed, arranged in a compact group; ALE largest, PLE smallest; ALE- PLE separated by less than ALE radius, PME touching each other; posterior row recurved from above, procurved from front (Fig. 6 B, I). Clypeus sinuous in frontal view, anterior lateral eyes separated from edge of carapace by about 1.1 times their diameter. Mouthparts: chelicerae straight, proximal region with one hair with elevated hair base; labium rectangular, anterior margin deeply incised (Fig. 6 D); endites slender, distally not branched (Fig. 6 D). Sternum with radial furrows between coxae I-II, II-III, III-IV; surface smooth (Fig. 6 D). Abdomen (Fig. 6 G, H): booklung covers ovoid, surface smooth; apodemes present, posterior spiracles not connected; epigastric region strongly elevated, with a cluster of densely short setae. 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 E – H, 7): orange; 0.46 long (0.15, 0.09, 0.08, 0.14); femur greatly elongated (width / length = 0.57); bulb kidney-shaped, tapering apically; embolus system (Fig. 7 E, F, H) with a leaf-shaped projection on base (blp) in prolateral view, a median branch (mb) in dorsal view, and a lateral long curved branch (lb) in retrolateral view. Female (SYNU- 276): Same as male except as noted. Habitus as in Fig. 8 A, C, E; slightly larger than male. Body length 1.46, carapace 0.67 long, 0.57 wide, abdomen 0.89 long, 0.53 wide. Endites unmodified. Epigastric area (Figs 5 C, 8 G): surface without external features. Endogyne (Fig. 5 D): with an anterior stick-shaped sclerite (as), and a posterior small globular structure (glo); transverse bar (tba) with two lateral apodemes (ap).
description
Figs 2 E – H, 5 C – D, 6 – 9
diagnosis
Diagnosis. This new species is similar to Trilacuna longling Tong, Zhang & Li, 2019, but males can be distinguished by the strongly elevated epigastric region and the cluster of densely short setae on epigastric region (Fig. 6 G, H) and females by absence of the transversally elongated sclerite of endogyne (Fig. 5 D). T. longling males have flat epigastric region and without cluster of densely short setae on epigastric region, and females have a transversally elongated sclerite of endogyne (Tong et al. 2019: figs 13 H, I, 24 J).
distribution
Distribution. Known only from the type locality (Fig. 9).
etymology
Etymology. The specific name is a noun in apposition from the type locality.
materials_examined
Type material. Holotype: Male (SYNU- 274), Wenfeng Mountain (31 º 4 ' 10.134 '' N, 109 º 55 ' 6.654 '' E, elevation 761 m), Wushan County, Chongqing Municipality, China, 25 October 2014, S. Lyu and Y. Tong leg. Paratypes: 1 male (SYNU- 275) and 4 females (SYNU- 276 – 279), same data as holotype. Other materials examined: 6 males (SYNU- 280 – 285) and 5 females (SYNU- 286 – 290), same data as holotype.