Otacilia yusishanica Liu sp. nov. Figures 15, 16, 17, 22

Type material.

Holotype: ♂, China, Jiangxi Province, Ji’an City, Xiajiang County, Yusi Mt., 27°33'05.52"N, 115°16'16.88"E, 202 m, 7 October 2019, leg. Ke-ke Liu et al. Paratypes: 5 ♂, 4 ♀, 4 juveniles, with same data as holotype.

Etymology.

The specific name refers to the type locality, Yusishan; adjective.

Diagnosis.

The males of the new species are similar to Otacilia acutangula Liu, 2020 in having a thick hook-shaped embolus, a C-shaped sperm duct and a finger-like retrolateral tibial apophysis (see Liu et al. 2020: 13, fig. 7C-F), but can be separated from it by the retrolateral tibial apophysis with a straight tip in retrolateral view (Figs 15D, E, 16A, B, D) (vs. with a slightly curved tip). The females resemble O. acutangula in having small bursae and thin connecting tubes (see Liu et al. 2020: 13, fig. 8C, D), but can be distinguished from it by the rectangular median septum (Fig. 17C) (vs. triangular) and the widely separated spermathecae (Fig. 17D) (vs. proximate spermatheca).

Description.

Male (holotype). Habitus as in Fig. 15A, B. Total length 3.29, carapace 1.48 long, width 1.21 wide. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.06, PLE 0.07, AME-AME 0.05, AME-ALE 0.02, PME-PME 0.11, PME-PLE 0.06, AME-PME 0.09, AME-PLE 0.17, ALE-ALE 0.23, PLE-PLE 0.37, ALE-PLE 0.10. MOA 0.24 long, frontal width 0.20, posterior width 0.25. Chelicerae (Fig. 15A, B) with three promarginal (proximal largest, distal smallest) and six retromarginal teeth (distal larger, others equal in size). Sternum (Fig. 15B) longer than wide. Pedicel 0.28 long. Abdomen (Fig. 15A, B) 1.58 long, 0.92 wide. Leg measurements: I 6.45 (1.65, 0.51, 1.94, 1.53, 0.82); II 5.13 (1.28, 0.53, 1.39, 1.18, 0.75); III 4.35 (1.12, 0.46, 0.94, 1.18, 0.65); IV 7.05 (1.92, 0.57, 1.67, 1.89, 1.00). Leg spination (Fig. 15A, B): femora I-IV with one dorsal spine each; femora I pv1111, II pv11; tibiae I v2222222, II v2222222; metatarsi I v2222, II v222.

Colouration (Fig. 15A, B). Carapace yellow-brown, with irregular, dark yellow, radial strips mediolaterally. Fovea distinct, black. Chelicerae, endites, labium, and sternum yellow-brown. Legs yellow, without dark annulations. Abdomen dark brown, with pair of pale stripes located at posterior of dorsal scutum, three light chevron-shaped stripes in posterior part and one yellowish arc-shaped stripe in front of anal tubercle; venter with H-shaped blackish-brown stripe posteromedially, pair of sloping blackish-brown stripes posterolaterally and N-shaped blackish-brown stripe posteriorly.

Palp (Figs 15C-E, 16). Femoral apophysis well-developed, width more than half of its length. Patella unmodified. Retrolateral tibial apophysis small, less than tibia length, bending inward toward base of cymbium, with straight tip in retrolateral view. Sperm duct C-shaped, strongly sclerotized, around base of subterminal apophysis and embolus. Distal tegular apophysis, membranous, extruding retrolaterally, covering most of retrolateral tegular apophysis. Embolus spine-like, thick, with broad base and blunt apex, embolic groove narrowed.

Female (paratype). Habitus as in Fig. 17A, B. Lighter than males. Total length 3.30, carapace 1.57 long, 1.35 wide. Eye sizes and interdistances: AME 0.07, ALE 0.06, PME 0.05, PLE 0.07, AME-AME 0.07, AME-ALE 0.04, PME-PME 0.10, AME-PME 0.10, AME-PLE 0.18, ALE-ALE 0.24, PLE-PLE 0.36, ALE-PLE 0.12. MOA 0.23 long, frontal width 0.19, posterior width 0.25. Chelicerae (Fig. 17A, B) with three promarginal (proximal largest, distal smallest) and five retromarginal teeth (distal largest, second smallest, all teeth with a same base). Pedicel 0.10 long. Abdomen (Fig. 17A, B) 1.63 long, 1.00 wide. Leg measurements (Fig. 17A, B): I 6.87 (1.87, 0.61, 2.05, 1.61, 0.73); II 5.00 (1.27, 0.47, 1.41, 1.15, 0.70); III 4.49 (1.16, 0.51, 0.99, 1.06, 0.77); IV 7.09 (1.82, 0.61, 1.73, 2.00, 0.93). Leg spination (Fig. 17A, B): femora I pv1111, II pv111; tibiae I v22222222, II v22222222; metatarsi I v2222, II v2222.

Colouration (Fig. 17A, B). Darker than males. Abdomen, venter with two pairs of dark brown stripes posteriorly, median one touching.

Epigyne (Fig. 17C, D). Epigynal plate bow-like, anterior margin weakly sclerotized, arc-shaped, medially with pair of hole-shaped copulatory openings, posteriorly with rectangular median septum. Copulatory ducts, glandular appendages, connecting tubes and spermathecae distinctly visible through integument in intact epigyne. Copulatory ducts between copulatory openings and glandular appendages, sloping laterally, broad, short, posteriorly with pair of small, oval, transparent bursae. Glandular appendages short, located on anterior of connecting tubes, near base of bursae. Connecting tubes slightly shorter than copulatory ducts, slightly curved forwards. Spermathecae slightly expanded, elongated, separated by mark of median septum. Fertilization duct short, directed anterolaterally.

Distribution.

Known only from the type locality in Jiangxi Province, China (Fig. 22).