Utivarachna fabaria Zhao & Peng, 2014

Jin, Chi, Yin, Xiangchu & Zhang, Feng, 2015, A new species of the genus Utivarachna Kishida, 1940 (Araneae: Trachelidae) from China, with the first description of the male of U. fabaria Zhao & Peng, 2014 and a redescription of U. gui (Zhu, Song & Kim, 1998), Zootaxa 4057 (4), pp. 569-581 : 573-574

Utivarachna fabaria Zhao & Peng, 2014

Figs 4–6

Utivarachna fabaria Zhao & Peng, 2014: 582 , figs 5A–C, 6A–B.

Type material: ♀ holotype and 8♀ paratypes from CHINA: Yunnan Province, deposited in the College of Life Sciences, Hunan Normal University, not examined.

Material examined. CHINA: Yunnan Province: Lushui County: 7♀, 2♂, Pianma Township (26º00.750'N, 98º37.305' E), 1812m a.s.l., 3 March 2011, leg. Luyu Wang and Zongxi Li; 1♀, Pianma Township, Yaojiaping Village (25°58.747′N, 98°42.474′E), 2740m a.s.l., 28 November 2011, leg. Luyu Wang; 1♂, Pianma Township (26°00.294′N, 98°39.554′E), 2318m a.s.l., 27 November 2011, leg. Luyu Wang; Tengchong County: 2♀, Jietou Township, Datang Village (25º37.492' N, 98º40.290'E), 1748m a.s.l., 21 February 2011, leg. Luyu Wang and Zongxi Li; 1♀, 5♂, Wuhe Township (24º53.112'N, 98º45.346'E), 2210m a.s.l., 27 February 2011, leg. Luyu Wang and Zongxi Li. All deposited in MHBU.

Diagnosis. Among the species of the kinabaluensis group, U. fabaria can be distinguished from U. rama Chami-Kranon & Likhitrakarn, 2007 by: 1) the straight terminal portion of the embolus, whereas it is slightly Sshaped in the latter; 2) the subtegulum is longer than that of U. rama ; 3) the chelicerae having three promarginal and three retromarginal teeth, whereas in U. rama they have three promarginal and four retromarginal teeth; 4) the copulatory openings funnel-shaped, whereas they are semilunar in the latter; 5) the copulatory ducts longer and more slender than those of U. rama ; 6) the spermathecae spherical, whereas they are reniform in U. rama .

Description. Male. Total length 4.44–5.63 (n=8). One male ( Fig. 4 A): total length 5.63. Carapace: 2.96 long, 2.36 wide. Opisthosoma: 2.67 long, 2.07 wide. Eye sizes and interdistances: AME 0.18, ALE=PME=PLE 0.16, AME–AME 0.11, AME–ALE 0.13, PME–PME 0.24, PME–PLE 0.28, ALE–PLE 0.25. MOA 0.45 long, anterior width 0.43, posterior width 0.55. AER almost straight, PER recurved, wider posteriorly. Clypeus height 0.17. Chelicerae coloured as carapace, with three promarginal and three retromarginal teeth. Carapace dark brown, surface rough, with white hairs. Fovea black, longitudinal and short. Sternum dark brown, with sparse white hairs. Labium longer than wide. Legs brown, without ventral cusps ( Figs 4 C–D), metatarsi III–IV distally with preening brushes ventrally. Leg measurements: I 8.01 (2.49, 1.13, 2.03, 1.57, 0.79), II 7.23 (2.19, 0.98, 1.75, 1.52, 0.79), III 5.35 (1.54, 0.82, 1.11, 1.39, 0.49), IV 6.71 (1.85, 0.81, 1.49, 1.86, 0.70), formula: 1243. Opisthosoma ovoid, with short black hairs. Dorsum blackish grey; dorsal scutum oval, yellowish-brown and lightly sclerotized, nearly as long as opisthosoma, with two pairs of muscular impressions, posterior margin truncated. Venter pale yellowish brown, with longitudinal rows of sclerotized spots.

Palp ( Figs 5 A–D, 6C–E). The apex of retrolateral tibial apophysis bears a small, sharp hook. Genital bulb longer than wide. Tegulum partly membranous, especially at base of embolus. Sperm duct distinct and U-shaped in ventral view, sickle-shaped in retrolateral view. Subtegulum strongly sclerotized, clearly visible in ventral view. Embolus coils narrower than genital bulb; embolus originating from centre of genital bulb; terminal portion of embolus filiform, resting in distal cymbial alveolus.

Female. Total length 4.80–5.53 (n=11). One female ( Fig. 4 B): total length 5.40. Carapace 2.46 long, 1.95 wide. Opisthosoma: 2.94 long, 2.32 wide. Eye sizes and interdistances: AME=ALE 0.15, PME 0.14, PLE 0.17, AME–AME 0.09, AME–ALE 0.08, PME–PME 0.22, PME–PLE 0.25, ALE–PLE 0.18. MOA 0.37 long, anterior width 0.39, posterior width 0.50. Clypeus height 0.12. Legs without ventral cusps. Leg measurements: I 6.03 (1.76, 0.83, 1.40, 1.29, 0.75), II 5.81 (1.68, 0.79, 1.33, 1.31, 0.70), III 4.64 (1.31, 0.69, 0.93, 1.19, 0.52), IV 6.02 (1.64, 0.71, 1.38, 1.63, 0.66), formula: 1423. Opisthosoma dorsum without dorsal scutum, with several transverse, archshaped grey markings from median portion to anal tubercle. Other characters as in male.

Epigyne ( Figs 5 E, 6A): atrium located posteriorly, wider than the distance between the outermost edges of spermathecae; copulatory openings funnel-shaped, situated at centre of epigyne. Vulva ( Figs 5 F, 6B): copulatory ducts nearly as long as half of connecting ducts, slightly curved; bursae bean-shaped, anterior portion heavily curved, posterior end near spermathecae and with defined patches that may be gland pores; spermathecae spherical, located posteriorly, very close to each other.

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

Figures

FIGURE 4. Utivarachna fabaria Zhao & Peng, 2014, A. male habitus, dorsal view; B. female habitus, dorsal view; C. male leg I, retrolateral view; D. male leg II, retrolateral view. Scale bars: 2 mm (A – B); 1 mm (C – D).

FIGURE 5. Utivarachna fabaria Zhao & Peng, 2014, A. male left palp, prolateral view; B. same, dorsal view; C. same, retrolateral view; D. same, ventral view; E. epigyne, ventral view; F. vulva, dorsal view. Scale bars: 0.5 mm (A – D); 0.2 mm (E – F).

FIGURE 6. Utivarachna fabaria Zhao & Peng, 2014, A. epigyne, ventral view; B. vulva, dorsal view; C. male left palp, prolateral view; D. same, ventral view; E. same, retrolateral view. Scale bars: 0.5 mm.

FIGURE 9. Distribution of Utivarachna lata sp. nov., U. fabaria Zhao & Peng, 2014 and U. gui (Zhu, Song & Kim, 1998).