Otacilia palmata, Yao & Irfan & Peng, 2019

Yao, Na, Irfan, Muhammad & Peng, Xianjin, 2019, Five new species of Otacilia Thorell, 1897 (Araneae: Phrurolithidae) from the Wuling Mountain Range, China, Zootaxa 4613 (2), pp. 290-304 : 296-298

Otacilia palmata sp. nov.

Figs 5 , 6

Type material. Holotype: ♂ , CHINA: Hubei Province: Enshi City, Xingdou Mountain National Nature Reserve, Sanxianchang , 30°2′14.96″N, 109°8′43.74″E, 1078 m a.s.l., 19 May 2017, leg. Guchun Zhou, Zongguang Huang and Tian Tian. Paratypes: 10♀, same data as holotype male .

Etymology. The species name is derived from the Latin adjective “ palmatus ”, meaning “palm-like”, referring to the unique structure of the retrolateral and dorsal tibial apophysis in the male palp. Adjective.

Diagnosis. The male of O. palmata sp. nov. can be easily distinguished from all of the other armatissima group species by the cymbium with a tail-shaped prolateral apophysis ( Figs 5G , 6C ), which is absent in all other species of the armatissima group. The female can be distinguished from all other armatissima group species, except O. macrospora Fu, Zhang & Zhang, 2016 (see Fu et al. 2016b: figs 20, 21) in having a similar relative position of the copulatory opening and bursae, but can be distinguished from it by the copulatory openings being much smaller than the bursae in O. palmata sp. nov. ( Figs 5C, D , 6D, E ), whereas almost as large as the bursa in O. macrospora (see Fu et al. 2016b: figs 20, 21). The distance between the spermatheca much wider than the width of the median plate in O. palmata sp. nov. ( Figs 5C, D , 6D, E ), while only a quarter of the width of the median plate in O. macrospora (see Fu et al. 2016b: figs 20, 21).

Description. Male (Holotype): Total length 4.21 (n = 1). Carapace 2.06 long, 1.81 wide, brown, anteriorly abruptly narrowed anteriorly; fovea, cervical and radial grooves distinct. Chelicerae with 3 promarginal and 2 retromarginal teeth. Clypeus 0.19 high. Eye sizes and interdistances: AME 0.09, ALE 0.08, PME 0.10, PLE 0.09; AME–AME 0.07, AME–ALE 0.02, PME–PME 0.13, PME–PLE 0.07, ALE–PLE 0.11 AME–PME 0.09. MOA 0.28 long, front 0.22 wide, back 0.32 wide. Labium and endites brown. Legs light brown. Measurements of legs: leg I 7.01 (1.91, 0.53, 2.06, 1.61, 0.90), II 5.56 (1.53, 0.48, 1.26, 1.34, 0.95), III 4.64 (1.27, 0.29, 0.97, 1.40, 0.71), IV 7.27 (1.96, 0.50, 1.56, 2.16, 1.09). Leg formula: IV-I-II-III. Femora I with three pl spines; femora I, II, IV with one do spine, absent on femora III; tibiae I with seven pairs of ve spines, tibiae II with seven pv spines, six rv spines; metatarsi I with four pairs of ve spines, metatarsi II with four pv spines, three rv spines. Abdomen 2.00 long, 1.42 wide, greyish-brown, oval, mid-dorsally with longitudinal grey stripe followed by transverse brown strip, grey posteriorly. Palp ( Figs 5F, G , 6 A–C): Femur with apophysis on mid-ventral surface. Retrolateral tibial apophysis short. Dorsal tibial apophysis longer than wide, curved, with pointed end. Cymbium curved with blunt end, base with tail-shaped prolateral cymbial apophysis; distal area with several thick macrosetae. Tegulum with small retrolateral apophysis. Conductor almost triangular, membranous, originating from base of embolus. Sperm duct thick and sclerotized. Embolus stout with pointed end, wider at base.

Female (one paratype): Total length 3.28–3.79 (n = 10). One female 3.46; carapace 1.78 long, 1.52 wide. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.06, PLE 0.08; AME–AME 0.06, AME–ALE 0.02, PME– PME 0.11, PME–PLE 0.07, ALE–PLE 0.09; AME–PME 0.10. MOA 0.26 long, front 0.22 wide, back 0.28 wide. Clypeus 0.16 high. Legs light yellow. Measurements of legs: leg I 5.74 (1.38, 0.54, 1.78, 1.23, 0.81), II 5.16 (1.32, 0.41, 1.35, 1.28, 0.80), III 4.09 (1.07, 0.38, 0.85, 1.12, 0.67), IV 6.02 (1.77, 0.43, 1.46, 1.48, 0.88). Leg formula: IV-I-II-III. Femora I with three pl spines; femora I-IV with one do spine; tibia I with seven pairs of ve spines, tibia II with seven pv spines, six rv spines; metatarsus I with four pairs of ve spines, metatarsus II with four pv spines, three rv spines. Abdomen 1.87 long, 1.25 wide, dark grey dorsally, with pair of cream L-shaped markings in anterior half. Other morphological characters as for male. Epigyne ( Figs 5C, D , 6D, E ). Copulatory openings small, separated by one-third width of atrium. Median plate thin, bar-like, narrowed. Bursae oval, transparent. Spermatheca separated by two-thirds width of the epigynal plate.

Distribution. Known only from the type locality ( Fig. 11 ).

Figures

FIGURE 5. Otacilia palmata sp. nov., holotype male (A,E–G) and paratype female (B–D). A–B habitus, dorsal view C epigyne, ventral view D vulva, dorsal view E male left palp, prolateral view F same, ventral view G same, retrolateral view. Scale bars: 0.5 mm (A–B), 0.2 mm (C–G).

FIGURE 6. Otacilia palmata sp. nov., holotype male (A–C) and paratype female (D–E). A male left palp, prolateral view B same, ventral view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view. Scale bars: 0.2 mm (A–E).

FIGURE 11. Distribution records of new species of the genus Otacilia Thorell, 1897 from Wuling Mountain Range, China.