Otacilia acutangula Liu, 2020

Liu, Ke-Ke, Luo, Hui-Pu, Ying, Yuan-Hao, Xiao, Yu-Xin, Xu, Xiang & Xiao, Yong-Hong, 2020, A survey of Phrurolithidae spiders from Jinggang Mountain National Nature Reserve, Jiangxi Province, China, ZooKeys 947, pp. 1-37 : 1

Otacilia acutangula Liu sp. nov. Figures 7 , 8

Type material.

Holotype: ♂, China: Jiangxi Province, Ji’an City, Jinggangshan County Level City, Ciping Town, Dajing Village, Jingzhushan Scenic Spot, 26°31'33.37"N, 114°06'30.34"E, 786 m, 1 October 2018, leg. Ke-Ke Liu et al. Paratypes: 2♀, with same data as holotype; 1♂, 1♀, same locality, Lingxiufeng Scenic Spot, 26°34'16.72"N, 114°07'00.56"E, 971 m, 1 October 2018, leg. Ke-Ke Liu et al.; 1♂, same locality, Xiaojing Village, Longtan Scenic Spot, 26°35'33.08"N, 114°08'18.50"E, 909 m, 1 October 2018, leg. Ke-Ke Liu et al.; 1♂, same locality, Bijiashan Scenic Spot, Hongjun Road, 26°36'25.88"N, 114°11'43.07"E, 549 m, 3 October 2018, leg. Ke-Ke Liu et al.

Etymology.

The specific name is derived from the Latin adjective acutangulus, referring to the bent retrolateral tibial apophysis that forms an angle of ca. 45° with its transverse base; adjective.

Differential diagnosis.

The new species differs from O. daweishan Liu, Xu, Xiao, Yin & Peng, 2019 by an oval distal tegular apophysis (Fig. 7C-F ) (vs. teardrop shaped), the bent RTA forming an angle of ca. 45° (Fig. 7D, E ) (vs. ca. 60°), and the strongly sclerotised ridges in the epigyne (Fig. 8C ) (vs. weakly sclerotised).

Description.

Male (Holotype). Habitus as in Fig. 7A, B . Total length 3.10, carapace 1.45 long, 1.31 wide. Eye sizes and interdistances: AME 0.08, ALE 0.10, PME 0.07, PLE 0.11; ALE-AME 0.02, AME-AME 0.06, PLE-PME 0.07, PME-PME 0.12, ALE-ALE 0.25, PLE-PLE 0.39, ALE-PLE 0.10, AME-PME 0.10, ALE-PME 0.10. MOA 0.25 long, front width 0.20, back width 0.27. Chelicerae (Fig. 7A, B ) with three promarginal (middle largest, distal smallest) and five retromarginal teeth (distal largest, proximal smallest). Sternum (Fig. 7B ), posteriorly pointed. Abdomen (Fig. 7A ) 1.43 long, 0.91 wide. Leg measurements: I 6.64 (1.73, 0.57, 1.98, 1.48, 0.88); II 5.42 (1.38, 0.50, 1.52, 1.26, 0.76); III 4.57 (1.16, 0.50, 1.07, 1.15, 0.69); IV 7.15 (1.96, 0.55, 1.73, 1.95, 0.96). Leg spination: femora I-IV with one dorsal spine each; femora I pv1111, II pv11; tibiae I v22222222, II v2222222; metatarsi I v2222, II pv1222.

Colouration (Fig. 7A, B ). Carapace yellow-brown. Chelicerae yellow-brown. Endites yellow. Labium and sternum yellow-brown. Legs yellow. Abdomen yellowish brown, with pair of small oval large triangular yellowish spots medially, large irregular yellowish spots medially also on the posterior dorsal scutum, three light chevron-shaped stripes on sub-medial part, and yellowish arc-shaped stripe posteriorly; weak dorsal scutum in anterior half, extending slightly past the midpoint.

Palp (Fig. 7C-F ). Femoral apophysis well-developed, width longer than half of length. Patella unmodified. Tibia with short retrolateral apophysis, less than tibial length, tapering-pointed, bending inwards to base of cymbium, forming an acute angle of ca. 45° with its transverse base in retrolateral view. Cymbium more than two times longer than wide. Bulb oval, with long U-shaped sperm duct, apophyses absent. Embolus hook-shaped, thick, with broad triangular base, apart from distal and retrolateral tegular apophyses. Retrolateral tegular apophysis straight, thickened, finger-shaped, submedial part covered by oval distal tegular apophysis.

Female. Habitus as in Fig. 8A, B . Lighter than male. Total length 2.87, carapace 1.42 long, 1.20 wide. Eye diameters: AME 0.09, ALE 0.09, PME 0.07, PLE 0.09; ALE-AME 0.01, AME-AME 0.04, PLE-PME 0.06, PME-PME 0.11, ALE-ALE 0.23, PLE-PLE 0.35, ALE-PLE 0.08, AME-PME 0.09, ALE-PME 0.10. MOA 0.23 long, front width 0.21, back width 0.24. Abdomen (Fig. 8A ) 1.37 long, 0.86 wide. Leg measurements: I 6.41 (1.62, 0.49, 2.00, 1.58, 0.72); II 5.27 (1.35, 0.53, 1.45, 1.22, 0.72); III 4.36 (1.15, 0.42, 1.00, 1.15, 0.64); IV 7.07 (1.88, 0.55, 1.75, 1.95, 0.94). Leg spination: femora I-IV with one dorsal spine each; tibiae I v2222222, II v222222.

Epigyne (Fig. 8C, D ). Epigynal plate mushroom-like, posterior with a triangular median septum, copulatory ducts, glandular appendages, connecting tubes and spermathecae distinctly visible through integument in intact epigyne. Anterior fovea separated by strongly sclerotised M-shaped margin, medially with concaved, large copulatory openings. Copulatory ducts broad, declivitous, posteriorly with pair of kidney-shaped transparent bursae medially. Glandular appendages short, anterior part covered by bursae, located on anterior of connecting tubes. Connecting tubes short, located between glandular appendages and spermathecae. Spermathecae slightly swollen, slightly separated. Fertilisation duct short, located apically on spermathecae.

Distribution.

Known only from the type locality in Jiangxi Province, China (Map 2 ).

Figures

Map 2. Map of China, enlargement showing records of Otacilia acutangula sp. nov., O. bijiashanica sp. nov., O. longtanica sp. nov., O. ovoidea sp. nov., O. shenshanica sp. nov., Otacilia subovoidea sp. nov. and O. xiaoxiica sp. nov. in Jinggang Mountain National Nature Reserve, Jiangxi.

Figure 7. Otacilia acutangula sp. nov., male holotype A habitus, dorsal view B same, ventral view C palp, prolateral view D same, ventral view E same, retrolateral view F same, dorsal view. Scale bars: 0.5 mm (A, B), 0.1 mm (C-F). Abbreviations: dTA - distal tegular apophysis, E - embolus, FA - femoral apophysis, RTA - retrolateral tibial apophysis, rTA - retrolateral tegular apophysis, SD - sperm duct.

Figure 8. Otacilia acutangula sp. nov., female paratype A habitus, dorsal view B same, ventral view C epigyne, ventral view D epigyne, dorsal view. Scale bars: 0.5 mm (A, B), 0.1 mm (C, D). Abbreviations: B - bursa, CD - copulatory duct, CO - copulatory opening, CT - connecting tube, FD - fertilisation ducts, GA - glandular appendage, MS - median septum, SP - spermathecae.