Jacaena aspera, Mu & Zhang, 2020

Mu, Yannan & Zhang, Feng, 2020, The genus Jacaena Thorell, 1897 from southern China (Araneae: Liocranidae), Zootaxa 4819 (2), pp. 335-348 : 336-338

Jacaena aspera sp. n. (ı×ƚ,)

Figs 1 D–F, 2D–F, 3

Type material. Holotype ♂ ( YNPB190809-01 ), CHINA, Yunnan Province, Hani-Yi Autonomous Prefecture of Honghe, Pingbian County, Daweishan Forest Park (103°42′18.75″E, 22°54′38.91″N), 1967m a.s.l., 9 Aug 2019, leg. Yannan Mu. Paratype: 1♀, same data as the holotype ; 1♀ ( YNML190815 ), Yunnan Province, Dai Autonomous Pre-fecture of Xishuangbanna , Mengla County, Menglun Town , Xishuangbanna Tropical Botanical Garden of Chinese Academy of Sciences (21°55′09.01″N, 101°16′14.34″E), 566m a.s.l., 15 Aug 2019, leg. Yannan Mu ; 1♀, Chongq-ing City, Simian Mountain National Nature Reserve, Dawopu Reserve Station , Chaqi Mountain (28°34′47.4′′N, 106°21′05.58′′E), 1336m a.s.l., 10 Nov 2011, leg. Luyu Wang ; 2♀, Yunnan Province, Hani-Yi Autonomous Prefec-ture of Honghe , Pingbian County, Daweishan Forest Park (22°57′12.18′′N, 103°41′35.28′′E), 1684m a.s.l., 10 May 2011, leg. Zongxu Li.

Etymology. The specific name is derived from the Latin word “asper”, meaning “rough”, referring to the rough surface of the tegular apophysis; adjective.

Diagnosis. This new species can be distinguished from all other Jacaena species by the large and thick tegular apophysis, which has a granulated surface ( Fig. 2F ).

Description. Male (Holotype). Total body length 4.90: carapace 2.60 long, 1.94 wide; abdomen 2.30 long, 1.37 wide. Carapace black, radial granulated integument on carapace; cephalic area relatively broad; fovea small and round. Eye sizes and interdistances: AME 0.12, ALE 0.14, PME 0.08, PLE 0.13; AME–AME 0.07, AME–ALE 0.03, PME–PME 0.11, PME–PLE 0.14; MOA 0.34 long, anterior width 0.30, posterior width 0.28. Clypeal height 0.20, greater than diameter of AME. Chelicerae moderately long, deep red-brown, with three promarginal teeth, two retromarginal teeth. Endites and labium gray; endites longer than wide, widest anteriorly, with maxillar hair tuft prolaterally. Labium almost as long as wide (0.38: 0.37), tip depressed, with several setae. Sternum brown, shieldshaped, with intercoxal sclerites between coxae I and II, II and III, III and IV; precoxal triangles present; anterior margin truncated, posterior margin not extending between coxae IV, only slightly narrower in front than in middle. Legs gray, tarsi with two dentate claws and conspicuous claw tufts, trochanters deeply notched. Leg spination: femur I with 2 strong pl spines ( Fig. 2E ), other femora spineless; tibia I with 7 pv and 6 rv spines, tibia II with 7 pv and 5 rv spines, tibia III with 2 pl and 3 rv spines, tibia IV with 3 pv and 2 rv spines, and 1 rl spine; metatarsus I with 4 pairs spines ventrally, metatarsus II with 4 pairs spines ventrally, metatarsus III with 1 pl, 2 rl spine, metatarsus IV with 2 pl, 1 rl spines. Leg I 5.95 (1.78+0.63+1.44+1.31+0.79); Leg II 6.12 (1.74+0.71+1.51+1.34+0.82); Leg III 5.57 (1.55+0.69+1.15+1.30+0.88); Leg IV 8.06 (2.15+0.79+1.81+2.14+1.17). Leg formula: 4213.

Abdomen ovoid and black, with small dorsal scutum (occupying less than half abdomen length); one pair of muscular impressions centrally, wrinkled on both sides.

Palp as illustrated ( Fig. 3 C–E). Tibia short, dark brown, RTA with two processes, sclerotized dorsal and membranous ventral surface; dRTA little, pRTA expanded. Tegulum white-yellow, reniform, with faint sperm duct and large tegular apophysis with strongly rough and granulated surface. Embolus long, with thin base, strongly coiled, tip along with tegular apophysis. Conductor indistinct, behind embolus.

Female. One female paratype total body length 6.12: carapace 2.94 long, 2.31 wide; abdomen 3.18 long, 1.94 wide. Carapace deep brown, radial granulate integument on carapace; cephalic area relatively broad; fovea inconspicuous. Eye sizes and interdistances: AME 0.13, ALE 0.14, PME 0.11, PLE 0.13; AME–AME 0.11, AME–ALE 0.06, PME–PME 0.11, PME–PLE 0.16; MOA 0.35 long, anterior width 0.33, posterior width 0.33. Clypeal height 0.27, more than two times diameter of AME. Leg I 8.35 (2.38+0.87+2.24+1.81+1.05); Leg II 7.38 (2.14+0.94+1.8 5+1.52+0.93); Leg III 5.78 (1.64+0.85+1.32+1.26+0.71); Leg IV 8.67 (2.28+0.81+2.09+2.41+1.08). Leg formula: 4123. Other characters as in male.

Abdomen ovoid and black, without dorsal scuta, with two pairs of muscular impressions centrally. Venter of abdomen light brown.

Epigynum as in Fig. 3 A–B. Epigynal plate poorly sclerotized, two copulatory openings large and circular, located at center of epigynal plate. Copulatory ducts long and tapered off, coiled as conical; fertilization ducts short. Spermathecae small, separated into two parts.

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

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 3. Jacaena aspera sp.n.. A epigyne, ventral view; B same, dorsal view; C male left palp, prolateral view; D same, ventral, view; E same, retrolateral view.

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