Jacaena luteolus, Mu & Zhang, 2020

Mu, Yannan & Zhang, Feng, 2020, The genus Jacaena Thorell, 1897 from southern China (Araneae: Liocranidae), Zootaxa 4819 (2), pp. 335-348 : 341-342

Jacaena luteolus sp. n. (黄.×ƚ,)

Figs 1G , 2B , 5 A–C

Type material. Holotype ♂, CHINA, Guangdong Province, Chaozhou City, Chao’an County, Jiaoshuikeng Vil-lage, 8 Aug 2011, leg. Shuwen Xing.

Etymology. The specific name is a Latin adjective meaning “tawny”, referring to the color of the palp.

Diagnosis. This new species is similar to J. jinxini , but can be distinguished by: 1) the short embolus (vs longer embolus); 2) the expanded and thumb-shaped pRTA (vs truncated); 3) the different color of whole palp fulvous.

Description. Male (Holotype). Total body length 5.89: carapace 2.97 long, 2.32 wide; abdomen 2.92 long, 1.72 wide. Carapace nearly circular, deep red-brown, with radial granulated integument; eye area relatively wide; fovea deep and round. Eye sizes and interdistances: AME 0.15, ALE 0.15, PME 0.10, PLE 0.14; AME–AME 0.10, AME–ALE 0.06, PME–PME 0.14, PME–PLE 0.15, ALE–PLE 0.10; MOA 0.36 long, anterior width equal to poste-rior width (0.36). Clypeal height 0.23. Leg spination: femur I with 2 strong pl spines, other femora spineless; femur I with 2 strong pl spines, other femora spineless; tibia I with 8 pv and 7 rv spines, tibia II with 6 pv and 8 rv spines, tibia III with 2 pl and 1 rv spines, tibia IV absent; metatarsus I with 5 pl and 4 rl spines, metatarsus II with 3 pl and 4 rl spines, metatarsus III with 1 pl spines, metatarsus IV absent. Leg I 7.85 (2.16+0.90+2.13+1.81+0.85), Leg II 7.07 (1.98+0.87+1.76+1.50+0.96), Leg III 6.20 (1.73+0.81+1.29+1.42+0.95), Leg IV absent. Leg formula: 4123. Other characters as for J. aspera sp. n., except for coloration.

Abdomen oval and gray, with small distinct dorsal scutum (occupying less than half the length of the abdomen), two pairs of muscular impressions centrally.

Palp as illustrated ( Fig. 5 A–C). Tibia short, yellowish-brown, RTA with two processes, dRTA rounded distally and strongly sclerotized, pRTA expanded and sclerotized. Tegulum same color as tibia, reniform, with distinct sperm duct and short thin tegular apophysis. Embolus short (not exceeding tip of TA), strongly coiled, tip alongside tegular apophysis. Conductor membranous, behind embolus.

Female: unknown.

Distribution. China ( Fig. 9 , Guangdong 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.