Otacilia hengshan ( Song, 1990 ) Song, 1990

Hu, Dong-Sheng & Zhang, Feng, 2011, Description of a new Otacilia species from China, with transfer of two species from the genus Phrurolithus (Araneae: Corinnidae), Zootaxa 2993, pp. 59-68 : 62-65

Otacilia hengshan ( Song, 1990) comb. nov.

( Figs 8–14 )

Phrurolithus hengshan Song, 1990: 342 , f. 3A–F; Song, Zhu & Chen, 1999: 411, f. 239I–J, 240K–L.

Diagnosis. Among the congeners, the male of Otacilia hengshan resembles that of O. liupan sp. nov., but can be distinguished from the latter by: (1) the long embolus (tip exceeding the retrolateral margin of cymbium from ventral view) ( Fig. 11 ); (2) the short tegular process ( Fig. 11 ); (3) the absence of small and semimembranous process near embolic base ( Figs 10, 11 ); (4) the short, narrow branch of RTA ( Fig. 9 ). The female of O. hengshan resembles that of O. komurai (Yaginum, 1952) , but can be distinguished from the latter by: (1) the anterior, semicircular copulatory openings ( Fig. 13 ); (2) the wide bursae ( Fig. 14 ).

Description. Male (“allotype” from Hengshan Mountain). Total body length 3.09. Carapace 1.61 long, 1.29 wide; abdomen 1.48 long, 0.85 wide. Carapace yellowish orange, with a slightly pale longitudinal stripe, and darker margin. Eyes in two transverse rows; both AER and PER slightly recurved from dorsal view (fig. 8). Eyes measurements: AME 0.07, ALE 0.07, PME 0.08, PLE 0.07; AME–AME 0.06, AME–ALE 0.05, PME–PME 0.10, PME–PLE 0.05; MOA almost as wide as long (0.24: 0.24), narrower anteriorly (0.20: 0.24). Chelicerae yellowish orange, with three promarginal teeth and six retromarginal teeth; front face with two pairs of spines, one pair short and the other pair long. Endites, labium and sternum yellowish orange. Endites longer than wide. Labium wider than long, round distally. Sternum slightly longer than wide, with sparsely distributed brown hairs. Legs yellowish orange. Femur I with four prolateral spines near the distal end; tibia I with eight ventral spines at prolateral margin and six at retrolateral margin; metatarsus I with six ventral spines at prolateral margin and five at retrolateral margin. Femur II with two prolateral spines near the distal end; tibia II with eight ventral spines at prolateral margin and seven at retrolateral margin; metatarsus II with four ventral spines at prolateral margin and three at retrolateral margin. Leg formula: 4213 ( Table 3).

Femur Patella Tibia Metatarsus Tarsus Total I 1.10 0.42 1.19 1.12 0.58 4.41 II 1.23 0.47 1.30 1.16 0.58 4.74 III 1.03 0.34 0.81 1.03 0.52 3.73 IV 1.67 0.47 1.60 1.77 0.81 6.32 Abdomen with a dorsal dark markings anteriorly, followed by several transversely extending bands; venter faint yellow, with four short, longitudinally extending bands between epigastric furrow and spinnerets.

Male palpus ( Figs 9–12 ). Femur ventrodistally swollen, with an apophysis and a concavity retrolaterally; RTA hook-shaped, base with six long clavate spines proximally ( Fig. 10 ); cymbium with a process retrolaterally ( Fig. 12 ); embolus sickle-shaped, tip protruding beyond cymbium from ventral view ( Fig. 11 ); sperm duct short, distinctly circle; tegulum convex, with thin and spiculate tegular process retrolaterally.

Female (holotype). Total body length 3.73. Carapace 1.67 long, 1.45 wide; abdomen 1.97 long, 1.16 wide. Carapace yellowish orange, with a wide, longitudinally extending black stripe, with black lateral margins. Eyes measurements: AME 0.08, ALE 0.10, PME 0.08, PLE 0.10; AME–AME 0.05, AME–ALE 0.05, PME–PME 0.10, PME–PLE 0.05. MOA almost as wide as long (0.26: 0.26), narrower anteriorly (0.21: 0.26). Eyes arrangement, shapes of mouthparts and abdominal markings as in male. Legs yellowish orange. Femur I with four prolateral spines near the distal end; tibia I with nine or ten pairs of ventral spines; metatarsus I with four pairs of ventral spines. Femur II with three prolateral spines near the distal end; tibia II with eight or nine pairs of ventral spines; metatarsus II with four ventral spines at prolateral margin and three at retrolateral margin. Leg formula: 4123 ( Table 4).

Femur Patella Tibia Metatarsus Tarsus Total I 1.75 0.58 1.94 1.52 0.68 6.47 II 1.39 0.47 1.47 1.32 0.65 5.30 III 1.20 0.44 1.08 1.13 0.62 4.47 IV 1.94 0.47 1.79 2.00 0.84 7.04 Epigyne ( Fig. 13 ) with copulatory openings semicircular, anteriorly; median plate thin and long. Vulva ( Fig. 14 ) with a pair of slanting spermathecae posteriorly, short stick-shaped, connecting to the short fertilization ducts; with a pair of large transparent bursae, anteriorly. Both spermathecae and bursae connected with copulatory openings.

Material examined. Male (“allotype”, IZCAS-Ar9218, deposited in Institute of Zoology, Chinese Academy of Sciences), China: Hunan, Hengshan Mountains (E112°86', N27°25'), October, 1987. Female (holotype, IZCAS- Ar9219, deposited in Institute of Zoology, Chinese Academy of Sciences), China: Hunan, Hengshan Mountain, January, 1988.

Distribution. Hunan ( Fig. 21 ).

Remarks. Phrurolithus hengshan was originally described by Song (1990); in Song et al. (1999) the illustrations of this species were copied from Song (1990).We borrowed the type specimens of P. hengshan , which conform to the diagnosis of Otacilia , such as the narrow and flat cephalic area, suddenly widened in the thoracic area; PME oval; anterior tibiae and metatarsi bear coupled ventral spines, posterior legs spineless; RTA with a long retrolateral branch and a short dorsal branch; enlarged membraneous bursae. Therefore we transferred this species to Otacilia .

Figures

FIGURE 21. Distribution of O. liupan sp. nov., O. hengshan (Song, 1990) and O. foveata (Song, 1990) in China.

FIGURES 8 – 14. Otacilia hengshan (Song, 1990) comb. nov. 8. Male body, dorsal view. 9. Left male palpus, prolateral view. 10. Same, retrolateral view. 11. Same, ventral view. 12. Cymbium of left male palpus, dorsal view. 13. Epigyne, ventral view. 14. Vulva, dorsal view. Scale bars: 1.0 mm (8); 0.3 mm (9 – 14).