Otacilia triangula, Mu & Jin & Zhang, 2022

Mu, Yannan, Jin, Chi & Zhang, Feng, 2022, Description of eight new species of Otacilia Thorell, 1897 from southern China (Araneae: Phrurolithidae), Zootaxa 5134 (2), pp. 238-260 : 250-252

Otacilia triangula sp. nov. (三ĦÞffifl)

Figs 10A–B , 11 , 12

Type material. Holotype ♂: CHINA: Chongqing City, Jinyun Mountain (29°50.43′N, 106°23.29′E, 777 m elev.), 16 Oct. 2011, leg. Luyu Wang.

Paratypes: 3♂, same data as holotype ; 1♂ 2♀, same location as holotype (29°50.43′N, 106°23.29′E, 777 m elev.), 24 Oct. 2017, leg. Yannan Mu ; 3♂, same location as holotype, 25 Oct. 2017, leg. Yannan Mu ; 4♀, same location as holotype, 23 Dec. 2012, leg. Dong Wang ; 2♀, Chongqing City, Wanzhou District, Wang er Bao Natural Reserve (30°39.304′N, 108°44.020′E, 1296 m elev.), 15 Mar. 2013, leg. Xuankong Jiang.

Etymology. This specific name is derived from the Latin word “triangularis”, referring to the triangle-shaped conductor; adjective.

Diagnosis. This new species resembles O. obesa Fu, Zhang & Zhang, 2016 by having a similar shaped bulb and RTA (compare Fig. 11B–C and figs 5–6 in Fu et al. 2016), but the males can be distinguished by the long and strongly curved embolus (vs short and slightly curved, compare Figs 11C , 12C with figs 5, 10 in Fu et al. 2016), the females can be distinguished by the long connecting tube and the large spermathecae (vs short and small, respectively, compare Fig. 12E–F with figs 12–13 in Fu et al. 2016).

Description. Male: total length 2.89–3.51 (n=8). Holotype ( Fig. 10A ): total length 2.89, carapace 1.55 long, 1.27 wide (CW); abdomen 1.34 long, 0.84 wide. Eye sizes and interdistances: AME 0.09, ALE 0.09, PME 0.07, PLE 0.09; AME–AME 0.06, AME–ALE 0.02, ALE–ALE 0.27, PME–PME 0.12, PME–PLE 0.09, PLE–PLE 0.44, ALE–PLE 0.11. Eye area 0.54 wide (EAW), cephalic region 0.71 wide (CRW), EAW/CRW 0.76. CRW/CW 0.56. MOA 0.27 long, anterior width 0.22, posterior width 0.28. Clypeal height 0.11 ( CH), CH /AME 1.22.

Palp as in Figs 11A–D , 12A–D . FA strongly raised, located at middle part of femur. RTA flake-shaped, base wide, tapering off from base to tip ( Figs 11B , 12B ). TA short and thin, close to and behind embolus, with little spot at the end. Embolus thick, strongly curved, with scar at middle part ( Figs 11B–C , 12B–C ). Conductor short, translucent, triangular in ventral view ( Figs 11C , 12C ), distal end reaching base of embolus.

Female: one paratype ( Fig. 10B ): total length 4.02, carapace 1.60 long, 1.36 wide (CW); abdomen 2.42 long, 1.81 wide. Eye sizes and interdistances: AME 0.09, ALE 0.09, PME 0.07, PLE 0.09; AME–AME 0.06, AME–ALE 0.02, ALE–ALE 0.28, PME–PME 0.13, PME–PLE 0.07, PLE–PLE 0.42, ALE – PLE 0.08. Eye area 0.52 wide (EAW), cephalic region 0.68 wide (CRW), EAW/CRW 0.76. CRW/CW 0.50 . MOA 0.24 long, anterior width 0.24, posterior width 0.29. Clypeal height 0.14 ( CH), CH / AME 1.56 .

Epigyne as in Figs 11E–F , 12E–F . Median septum thin and long, about one diameter of spermathecae ( Fig. 12E ), with parallel edges. Copulatory openings large and oval, located at anterior of plate, separated by about 1.5 times the diameter of spermathecae. Copulatory ducts thick, bent into semicircle, connected with bursa. Glandular appendage short, digit-shaped. Bursa oval, large. Connecting tube long and thin, curved at anterior part, straight at end. Spermathecae oval, close to each other. Fertilization ducts located at anterior of spermathecae.

Measurements of legs:

Spination of legs:

Distribution. China (Chongqing City).

Figures

FIGURE 10. Habitus, male holotype and female paratype. Otacilia triangula sp. nov.: A. Male, dorsal view; B. Female, dorsal view; Otacilia shunhuangshana sp. nov.: C. Male, dorsal view; D. Female, dorsal view; Otacilia subkomurai sp. nov.: E. Male, dorsal view; F. Female, dorsal view; Otacilia xueshanensis sp. nov.: G. Male, dorsal view; H. Female, dorsal view. Red arrow: dorsal scutum.

FIGURE 11. Otacilia triangula sp. nov.: A. Male left palp, prolateral view; B. same, retrolateral view; C. Same, ventral view; D. same, dorsal view; E. epigyne, ventral view; F. Same, dorsal view. Red arrow: copulatory plug.

FIGURE 12. Otacilia triangula sp. nov.: A. Male left palp, prolateral view; B. same, retrolateral view; C. Same, ventral view; D. same, dorsal view; E. epigyne, ventral view; F. Same, dorsal view.Abbreviations: B—bursa; C—conductor; CD—copulatory duct; CO—copulatory opening; CT—connecting tube; E—embolus; FA—femoral apophysis; FD—fertilization duct; GA— glandular appendage; MS—median septum; RTA—retrolateral tibial apophysis; S—spermatheca; SD—sperm duct; TA—tegular apophysis. Scale bars: 0.2 mm (A–F).