Otacilia fabiformis, Liu & Xu & Xiao & Yin & Peng, 2019

Liu, Keke, Xu, Xiang, Xiao, Yonghong, Yin, Haiqiang & Peng, Xianjin, 2019, Six new species of Otacilia from southern China (Araneae: Phrurolithidae), Zootaxa 4585 (3), pp. 438-458 : 444-448

Otacilia fabiformis sp. nov.

Figs 6 ̄8

http://zoobank.org/NomenclaturalActs/10ffd188-d08f-4aac-aea6-8a7be5e45ef8

Type material. Holotype: ♂: CHINA: Hunan Province, Chenzhou City, Yizhang County, Mangshan National

Forest Park, Jiangjunzhai Scenic Spot, 24°56.58'N, 112°56.9'E, 1240 m a.s.l., 6 December 2017, leg. H.Q. Yin, A.L. He, J.X. Liu, Y.H. Xie, Y. Yang and P. Dong. Paratypes: 1 ♂, 1 ♀, with same data as holotype; 1 ♀, CHINA: Hunan Province, Chenzhou City, Yizhang County, Mangshan National Forest Park , Yiping Scenic Spot , 24°59.19'N, 112°54.54'E, 1240 m a.s.l., 5 December 2017, leg. H.Q. Yin, A.L. He, J.X. Liu, Y.H. Xie, Y. Yang and P. Dong.

Etymology. The specific name comes from the combination of Latin words ' faba ' (bean) and ' formis ' (shape), referring to the bean-shaped spermathecae of the female vulva; adjective.

Diagnosis. The new species resembles O. hippocampa Jin, Fu, Yin & Zhang, 2016 , but males can be distinguished by the RTA with a slightly widened subterminal part, and the DTA extending along the cymbium and with a modified extension, and females by the parenthesis-shaped connecting tubes and peanut-shaped spermathecae (compare Figs 6B ̄E, 7B, 8ĀD, F with figs 1–3 in Jin et al. 2016).

Description: Male. Habitus as in Fig. 6A . Total length 2.35, prosoma yellow, elevated in dorsal view, with radial, irregular dark stripes mediolaterally and arc-shaped dark stripes around margin, length 1.27, width 1.13. Eye diameters: AME 0.06, ALE 0.09, PME 0.09, PLE 0.10; interdistances: AME–AME 0.02, ALĒAME 0.02, PME– PME 0.06, ALĒALE 0.15, PLĒPME 0.27, PLĒPLE 0.03, ALĒPLE 0.05, AMĒPME 0.06. MOA 0.22 long, front width 0.14, back width 0.22. Cervical groove and fovea distinct. Chelicerae yellow, stout, with two strong setae near base in frontal view, abundant hairs along promarginal teeth, three promarginal (proximal largest, distal smallest) and bifurcated retromarginal tooth. Endites yellowish, slightly longer than wide. Labium longer than wide. Sternum longer than wide, yellowish, setae sparse. Opisthosoma elongate elliptical in dorsal view ( Fig. 6A ), length 1.15, width 0.90, yellow-brown, with two triangular dark spots on anterolateral part, four black fishbone chevrons and two black arched stripes near anal tubercle; narrow yellow triangular dorsal scutum anteriorly; venter yellowish, with irregular dark spots. Legs yellow ( Fig. 8A ), with distinct annulations on distal part of femora, patellae, tibiae and metatarsi; measurements: I 4.31 (1.16, 0.42, 1.33, 0.96, 0.44); II 3.88 (1.04, 0.41, 0.96, 0.95, 0.52); III 3.29 (0.95, 0.21, 0.69, 0.91, 0.53); IV 4.48 (1.14, 0.31, 0.95, 1.35, 0.73). Leg spination: femur I and II with single dorsal spine; Femur I pv111, II pv11; Tibia I v222222, II v22222; Metatarsus I v2222, II pv111, rv1111. Leg formula: 4123. Spinnerets yellow, with abundant setae.

Palp (6B̄E, 8ĀD). Femur with blunt ventral apophysis. RTA large, thumb-like, with slightly widened subterminal part and blunt apex in ventral view; oxhorn-shaped in retrolateral view. DTA large, with sharp apex extending along the cymbium dorsally. Spermophor strongly sclerotized. Membranous conductor originating distoretrolaterally, relatively large. Embolus short, spine-like.

Female. Habitus as in Fig. 7A . As in male except as noted. Females darker than males. Total length 2.60, prosoma length 1.37, width 1.12. Eye diameters: AME 0.08, ALE 0.10, PME 0.09, PLE 0.11; interdistances: AME–AME 0.02, ALĒAME 0.01, PME–PME 0.08, ALĒALE 0.21, PLĒPME 0.03, PLĒPLE 0.32, ALĒPLE 0.05, AMĒPME 0.06. MOA 0.27 long, front width 0.17, back width 0.25. Opisthosoma ( Fig. 7A ) length 1.43, width 1.01, with short black arrow-like stripe in anterior half dorsally. Leg measurements: I 4.68 (1.19, 0.49, 1.39, 1.19, 0.42); II 4.16 (1.10, 0.44, 1.02, 1.06, 0.54); III 3.57 (0.91, 0.47, 0.69, 0.90, 0.60); IV 4.79 (1.26, 0.36, 1.03, 1.35, 0.79).

Female epigyne ( Figs 7B, C , 8E, F ) with small round copulatory openings located centrally. Connecting tube

running in two semicircles posteriorly, forming transversely oriented oval, with pair of large transparent bursae anteriorly. Spermathecae peanut-like, located at posterior end of vulva. Fertilization ducts extending anteriorly. Distribution. Known only from the type locality in Hunan Province, China ( Fig. 16 ).

Figures

FIGURES 6A–E. Otacilia fabiformis sp. nov., male holotype. A. Habitus, dorsal view. B. Palp, prolateral view. C. Same, ventral view. D. Same, retrolateral view. E. Same, dorsal view. Scale bars: A = 0.5 mm; B–D = 0.25 mm.

FIGURES 7A–C. Otacilia fabiformis sp. nov., female paratype. A. Habitus, dorsal view. B. Epigyne, ventral view. C. Vulva, dorsal view. Scale bars: A = 1 mm; B, C = 0.1 mm.

FIGURES 8A–F. Otacilia fabiformis sp. nov., male holotype and female paratype. A. Palp, prolateral view. B. Same, ventral view. C. Same, retrolateral view. D. Same, dorsal view. E. Epigyne, ventral view. F. Vulva, dorsal view. Abbreviations: B, bursa; CO, copulatory opening; CT, connecting tube; DTA, dorsal tibial apophysis; E, embolus; FA, femur apophysis; FD, fertilization duct; GA, glandular appendage; PP, posterior plate; RTA, retrolateral tibial apophysis; SP, spermatheca; SPO, spermophor. Scale bars: A̅D = 0.25 mm; E, F = 0.1 mm.

FIGURE 16. Collection localities for Otacilia ailan sp. nov., O. daweishan sp. nov., O. fabiformis sp. nov., O. jiandao sp. nov., O. nonggang sp. nov. and O. yinae sp. nov. in China.