Jacaena menglaensis, Mu & Zhang, 2020

Mu, Yannan & Zhang, Feng, 2020, The genus Jacaena Thorell, 1897 from southern China (Araneae: Liocranidae), Zootaxa 4819 (2), pp. 335-348 : 343

Jacaena menglaensis sp. n. (ŧĸ×ƚ,)

Figs 1H , 2C , 5 D–E

Type material. Holotype ♂, CHINA, Yunnan Province, Dai Autonomous Prefecture of Xishuangbanna, Mengla County, Menglun Town , Xishuangnanna Tropical Botanical Garden of ChineseAcademy of Sciences(21°54’36.41’’N, 101°16’11.17’’E), 526 m a.s.l., 12 July 2018, leg. Chi Jin.

Etymology. The species name is a noun in apposition, derived from the type locality.

Diagnosis. This new species is similar to J. aspera sp. n., but can be distinguished by: 1) the thin and smooth tegular apophysis (vs thicker and rough); 2) the salient dRTA (vs small).

Description. Male (Holotype). Total body length 6.06: carapace 3.21 long, 2.49 wide; abdomen 2.85 long, 1.73 wide. Carapace oval, deep black brown, with radial granulated integument; fovea deep and round. Eye sizes and interdistances: AME 0.12, ALE 0.14, PME 0.12, PLE 0.12; AME–AME 0.11, AME–ALE 0.08, PME–PME 0.12, PME–PLE 0.20, ALE–PLE 0.20; MOA 0.33 long, anterior width slowly short than posterior width (0.33: 0.42). Clypeal height 0.27, more than two times of the diameter of AME. Leg spination: femur I with 2 strong pl spines, other femora spineless; tibia I with 6 pv and 7 rv spines, tibia II with 6 pairs of ventral spines, tibia III with 3 pl and 2 rv spines, and 1 pl and 1 rl spines, tibia IV with 3 pv and 1 rv spines; metatarsus I with 4 pairs of ventral spines, metatarsus II with 4 pairs of ventral spines, metatarsus III with 1 pl, 1 rl and 1 rv spines, metatarsus IV with 1 pv, 2 rv, and 1 pl, 1 rl spines. Leg I 8.53 (2.36+0.99+2.23+1.85+1.10), Leg II 7.51 (2.17+0.95+1.83+1.53+1.03), Leg III 6.63 (1.82+0.88+1.37+1.60+0.96), Leg IV 9.56 (2.48+0.98+2.13+2.57+1.40). Leg formula: 4123. Other characters see J. aspera sp. n., except for different coloration.

Abdomen oval and dark gray, with small dorsal scutum and pair of muscular impressions centrally.

Palp as illustrated ( Fig. 5 D–E). Tibia short, dark brown, RTA with two processes, dRTA triangular, strongly sclerotized, tip milky; pRTA short and sclerotized. Tegulum yellow-brown, reniform, with faint sperm duct and long, spiral and cuspidal tegular apophysis; subtegulum thin. Embolus thin, strongly coiled, tip along with tegular apophysis. Conductor membranous, behind embolus.

Female: unknown.

Comment: This new species and one of the paratypes of another new species ( J. aspera sp. n.) were both collected from same location (Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences). However, the distribution range of J. aspera sp. n. is larger than J. menglaensis sp. n..

Distribution. China ( Fig. 9 , Yunnan Province).

Figures

FIGURE 1. Jacaena spp. habitus. J. bannaensis sp. n. (A–C); J. aspera sp. n. (D–F); J. luteolus sp. n. (G); J. menglaensis sp. n. (H). A male (holotype) habitus, dorsal view; B female habitus, dorsal view; C same, ventral view; D male (holotype) habitus, dorsal view; E female habitus, dorsal view; F same, ventral view; G male (holotype) habitus, dorsal view; H male (holotype) habitus, dorsal view.

FIGURE 2. Jacaena spp. cephalothorax, frontal view (A–D).A J. bannaensis sp. n. (holotype); B J. luteolus sp. n. (holotype); C J. menglaensis sp. n. (holotype); D J. aspera sp. n. (female); E female left femur I (J. aspera sp. n.); F male (holotype), granulated TA (J. aspera sp. n.).

FIGURE 5. Jacaena luteolus sp. n. (A–C); Jacaena menglaensis sp. n. (D–F). A male left palp, prolateral view; B same, ventral, view; C same, retrolateral view; D male left palp, prolateral view; E same, ventral, view; F same, retrolateral view.

FIGURE 9. Distribution in China of the Jacaena species treated in this paper.