Otacilia dentigera, Mu & Zhang, 2021

Mu, Yannan & Zhang, Feng, 2021, Seven new Otacilia Thorell, 1897 species from China (Araneae: Phrurolithidae), Zootaxa 5032 (4), pp. 533-548 : 541-543

Otacilia dentigera sp. nov. (小ŵDzḇü)

Fig. 5

Type material. Holotype ♂ (SCMX-15-09): CHINA: Sichuan Province, Tibetan Qiang Autonomous Prefecture of Ngawa, Mao County, Maoxian Mountain Ecosystem Research Station of Chinese Academy of Sciences (31°41.539´N, 103°53.809´E, 1885 m), 26 May 2015, leg. Luyu Wang.

Paratypes: 2♂ 3♀, with same data as holotype .

Etymology. The specific name is derived from the Latin word “dentigerous”, referring to the small tooth at the base of RTA; adjective.

Diagnosis. This new species resembles O. microstoma Wang et al., 2015 in genitalic morphology, but males can be distinguished by the wide base and narrow tip of the RTA (vs narrow base and wide tip) and the thin embolus (vs wider) (compare Fig. 5D–G with fig. 2C–E in Wang et al. 2015). Females are recognized by the long and looped copulatory duct (vs V-shaped) in the female (compare Fig. 5H–I with fig. 2F–G in Wang et al. 2015).

Description. Male. Total length 2.70–2.76 (n=3). Holotype: total length 2.74; carapace 1.33 long, 1.13 wide; abdomen 1.41 long, 0.93 wide. Carapace dark yellow, smooth, higher at central area. Radial groove and cervical groove indistinct, fovea dark red. Eye sizes and interdistances: AME 0.06, ALE 0.07, PME 0.07, PLE 0.08; AME– AME 0.06, AME–ALE 0.02, ALE–ALE 0.19, PME–PME 0.12, PME–PLE 0.06; PLE–PLE 0.35, ALE–PLE 0.07. MOA 0.21 long, anterior width 0.18, posterior width 0.25. Clypeal height 0.08. Chelicerae brown, with three promarginal and two retromarginal teeth. Sternum yellow. Legs yellow, with faint black lateral annuli near ends of femora and tibiae. Measurements of legs: I 4.37 (1.15, 0.46, 1.22, 1.00, 0.54), II 3.75 (1.05, 0.43, 0.92, 0.88, 0.47), III 3.28 (0.85, 0.39, 0.65, 0.87, 0.52), IV 4.79 (1.31, 0.44, 1.05, 1.34, 0.65). Spination: femora I–IV d1b except femur III, femur I pl 1111, femur II pl 11, tibia I pv 111111 rv 1111111, tibia II pv 111111 rv 11111, metatarsus I v 2222, metatarsus II pv 1111 rv 111. Abdomen oval, yellow-brown, with large yellow dorsal scutum anteriorly, with two black chevron stripes medially, and three black transverse stripes close to anal tubercle.

Palp as in Fig. 5D–G . Femoral apophysis weakly sclerotized, well-developed. RTA medium-sized, triangular, with acicular tip and wide base, with small tooth near base of RTA. Tibia with sclerotized triangular prolateral apophysis ( Fig. 5D ). Bulb pyriform, sperm duct thick and strongly sclerotized, surrounding central membranous area; tegular apophysis small, blunt; embolus moderately long, slightly curved.

Female. Total length 2.95–3.53 (n=3). One paratype: total length 3.53; carapace 1.37 long, 1.22 wide; abdomen 2.16 long, 1.56 wide. Eye sizes and interdistances: AME 0.07, ALE 0.10, PME 0.08, PLE 0.09; AME–AME 0.05, AME–ALE 0.02, ALE–ALE 0.20, PME–PME 0.10, PME–PLE 0.04, PLE–PLE 0.34, ALE–PLE 0.06. MOA 0.22 long, anterior width 0.18, posterior width 0.26. Clypeal height 0.10. Measurements of legs: I 4.67 (1.28, 0.52, 1.35, 1.10, 0.42), II 4.16 (1.10, 0.47, 1.03, 0.98, 0.58), III 3.63 (0.94, 0.43, 0.76, 0.94, 0.56), IV 5.08 (1.41, 0.50, 1.13, 1.38, 0.66). Spination: femora I–IV d1b, femur I pl 1111, femur II pl 11, tibia I pv 111111 rv 1111111, tibia II pv 11111 rv 111111, metatarsus Ⅰ v 2222, metatarsus II pv 1111 rv 111. Abdomen gray, with five black chevron stripes in dorsal view. Other characters as in male, except darker color.

Epigyne as in Fig. 5H–I . Epigynal plate sclerotized. Copulatory openings small, close to each other; copulatory ducts long, curved and looping, covered by bursae; glandular appendages short and thin; bursae large, transparent; spermathecae clavate, slanted, close to each other; fertilization ducts short, located at anterior of spermathecae.

Distribution. China (Sichuan Province) ( Fig. 8).

Figures

FIGURE 5. Otacilia dentigera sp. nov., male holotype and female paratype. A. Male, dorsal view; B. Female, dorsal view; C. Same, ventral view; D. Male left palp, prolateral view; E. Same, ventral view; F. Same, retrolateral view; G. Same, dorsal view; H. Epigyne, ventral view; I. Same, dorsal view. Abbreviations: B—bursa; CD—copulatory duct; CO—copulatory opening; E—embolus; FD—fertilization duct; GA—glandular appendage; PTA—prolateral tibial apophysis; RTA—retrolateral tibial apophysis; S—spermatheca; SD—sperm duct; TA—tegular apophysis.