Otacilia ailan Liu & Xu & Xiao & Yin & Peng 2019, sp. nov.

Otacilia ailan sp. nov.

Figs 1, 2

http://zoobank.org/NomenclaturalActs/2a628a1e-67cc-42d0-8fdf-7d40b690dc7a

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: 3 ♀, with same data as holotype; 1 ♀, CHINA: Hunan Province, Chenzhou City, Yizhang County, Mangshan National Forest Park, Houwangzhai Scenic Spot, 24°59.4'N, 112°53.12'E, 500 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 is taken from the first name of Ms. Ailan He, who took part in a lot of collecting activities and collected many spider specimens; noun in apposition.

Diagnosis. The new species is similar to O. biarclata Fu, He & Zhang, 2015 in having the X-shaped copulatory ducts (see Fu et al. 2015: 437, figs 1̄20), but differs from the latter species by the curved transparent bursae and the indistinct spermathecae (Figs 1B, C, 2). Male unknown.

Description: Female. Habitus as in Fig. 1A. Total length 3.95, prosoma (Fig. 1A) yellow-brown, elevated in dorsal view, with radial, irregular dark grey mottled markings on surface, length 1.89, width 1.66. Eye diameters: AME 0.09, ALE 0.10, PME 0.09, PLE 0.11; interdistances: AME–AME 0.07, ALĒAME 0.03, PME–PME 0.12, ALĒALE 0.28, PLĒPME 0.08, PLĒPLE 0.43, ALĒPLE 0.12, AMĒPME 0.09. MOA 0.27 long, front width 0.24, back width 0.31. Cervical grooves and fovea distinct. Chelicerae yellow-brown, stout, with two strong setae near base in frontal view, abundant hairs along promarginal teeth, three promarginal (proximal largest, distal smallest) and six retromarginal teeth (distal largest, others equal in size). Endites yellow-brown, longer than wide. Labium longer than wide. Sternum longer than wide, yellow-brown, setae sparse. Opisthosoma elliptical in dorsal view (Fig. 1A), length 1.52, width 0.99, dark brown, with abundant patches, three bright chevron-shaped strips and long arched bright stripe on posterior part, and single arched white stripe near anus; venter yellow. Legs (Fig. 1A) yellow-brown, without annulations on distal part of femora, patellae, tibiae and metatarsi; measurements: I 8.05 (2.03, 0.57, 2.45, 2.06, 0.94); II 5.52 (1.45, 0.44, 1.57, 1.27, 0.79); III 4.78 (1.24, 0.48, 1.06, 1.23, 0.77); IV 7.78 (2.01, 0.66, 1.92, 2.34, 0.76). Leg spination (left side): Femur I pv1111, II pv11111; Tibia I v22222222, II v222222; Metatarsus I v2222, II pv11111, rv11; (right side): Femur I rv11111, II pv11; Tibia I v22222222, II v222222; Metatarsus I v2222, II pv11, rv11111. Leg formula: 1423. Spinnerets yellow brown, with abundant setae.

Epigyne (Figs 1B, C, 2) with large copulatory openings located anterolaterally. Copulatory ducts short and broad. Connecting tubes, V-shaped in ventral view, with pair of large, sock-shaped, transparent bursae anteriorly. Glandular appendages short, located anterolaterally on copulatory ducts. Spermathecae indistinct, with similar diameter to copulatory ducts, posteriorly covered by posterior plate in dorsal view. Fertilization ducts located subapically at spermathecae.

Distribution. Known only from the type locality in Hunan Province, China (Fig. 16).