Otacilia jianfengling, Fu & Zhang & Zhu, 2010

Fu, Jian-Ying, Zhang, Feng & Zhu, Ming-Sheng, 2010, Three new species of the genus Otacilia (Araneae: Corinnidae) from Hainan Island, China, Journal of Natural History 44 (11 - 12), pp. 639-650 : 641-645

Otacilia jianfengling sp. nov.

( Figures 1 and 2 )

Type material

Holotype male, China: Hainan Province, Ledong County, Mt. Jianfengling (18.61° N, 108.93° E), 9 August 1980, M. S. Zhu leg. ( MHBU) . Paratypes, one male, four females, same data as holotype ( MHBU) .

Diagnosis

This new species resembles Otacilia lynx (cf. Kamura 1994: 167, figs. 8–13) in the shape of the genital organs, but can be distinguished from the latter by: (1) abdomen dorsal markings containing a large, dark brown, oval-shaped scutum, whereas O. lynx is without scutum but has a light coloured, concave patch, and distinct corners on the two posterior margins ( Figure 1B ); (2) retrolateral tibial apophysis of male palp shorter than in O. lynx ( Figure 2C–E ); (3) spermathecae distinctly longer and thicker than in O. lynx , while bursae longer and thinner than the latter’s ( Figure 2A, B ). The male palp of this new species also resembles O. bawangling but in the former the tegular process faces the opposite direction of the embolus while in the latter the tegular process faces in the same direction as the embolus.

Etymology

The species name is a noun in apposition, derived from the type locality.

Description

Male (holotype). Total length 3.38: cephalothorax 1.58 long, 1.35 wide, head width 0.35; abdomen 1.80 long, 0.94 wide. Carapace elongate-ovoid in dorsal view, bulging, highest almost at dorsal groove, widest at coxae II and III ( Figure 1B ); light yellow, darker in eye area; cephalic groove and radial furrow brown; thoracic groove short, longitudinal. Eyes moderately large, arranged in two transverse rows; from above, AER slightly recurved, PER slightly wider than AER and slightly procurved ( Figure 1A ); eye diameters: AME 0.10, ALE 0.10, PME 0.08, PLE 0.09; between-eye distances: AME–AME 0.15, AME–ALE 0.13, PME–PME 0.19, PME–PLE 0.10, ALE– PLE 0.08; MOA 0.32 long, anterior width 0.23, posterior width 0.26. Clypeal height 0.10. Chelicera moderately long, brown and with three joined teeth on the promargin and three separate teeth on retromargin; with two spines anterior, one short and the other long. Endites slightly longer than wide, constricted on lateral margin. Labium wider than long, round distally. Sternum heart-shaped, truncate at front, pointed behind, with strongly rebordered margins.

Legs brown, femur I with two dorsal spines, seven prolateral spines; tibia I with 11 pairs of ventral spines; metatarsus I with four pairs of ventral spines. Femur II with one dorsal spine and four prolateral spines; tibia II with eight pairs of ventral spines; metatarsus II with four pairs of ventral spines; femur III and femur IV each with one dorsal spine, no prolateral spine; other segments have no spines. Measurements of legs are given in Table 1. Leg formula: 1-4-2-3.

Male palp ( Figure 2C–E ) with single, large retrolateral tibial apophysis extending posteriorly; femur with a hump on ventral side and with a small depression on retrolateral side. Tegulum convex, without conductor but with a conspicuous, apical, tegular process; embolus hook-shaped, short, situated at tip of tegulum; sperm duct oval, thick and distinct. Abdomen ovoid, yellowish, a narrow dorsal scutum on anterior part, posterior half with four white stripes dorsally.

Female. Carapace colour, eye arrangement and abdominal colouration as for male. A paratype female was measured, total length 5.58: cephalothorax 2.25 long, 1.90 wide; abdomen 3.33 long, 2.20 wide. Clypeal height 0.11. Eye diameters: AME 0.10, ALE 0.10, PME 0.08, PLE 0.09; between-eye distances: AME– AME 0.20, AME–ALE 0.16, PME–PME 0.26, PME–PLE 0.14, ALE–PLE 0.29; MOA 0.30 long, front width 0.20, back width 0.23. Abdomen without a dorsal scutum.

Legs brown, femur I with two dorsal spines, six prolateral spines; tibia I with 11 pairs of ventral spines; metatarsus I with four pairs of ventral spines; femur II with one dorsal spine and four prolateral spines, tibia II with eight pairs of ventral spines, metatarsus II with three pairs of ventral spines; femur III and femur IV each with one dorsal spine, no prolateral spine; other segments have no spines. Leg measurements are given in Table 2. Leg formula: 1-4-2-3.

Epigyne with two semicircular copulatory openings ( Figure 2A, B ), each situated about midway along outer epigyne margin; median plate broad. Vulva anteriorly with a pair of large transparent bursae, posteriorly with a pair of thick spermathecae, both spermathecae and bursae connected with copulatory openings.

Variation

Body length: male 3.31–3.38, female 3.97–5.58. Femur I prolateral spines in other males: five; tibia I ventral spines in other male: nine pairs; femur II prolateral spines in other males: three; tibia II ventral spines in other male: eight pairs; femur I prolateral spines in females: six, six, six; tibia I ventral spines in other females: nine, 11, 12 pairs; femur II prolateral spines in other females: three, four, four; tibia II ventral spines in other females: 10, eight, 10 pairs.

Distribution

Presently known only from the type locality, Mt. Jianfengling , Hainan Province, China .

Figures

Figure 1. Otacilia jianfengling, sp. nov. (A) Eye region of male, dorsal view; (B) male body, dorsal view; (C) left chelicera of male, posterior view; (D) endites, labium and sternum of male, ventral view; (E) left chelicera of male, lateral view; (F) male left leg I, lateral view; (G) male left leg II, lateral view; (H) male left leg III, lateral view.Scale bars: (B, F–H) 1.0 mm; (D) 0.5 mm; (A, C, E) 0.3 mm.

Figure 2. Otacilia jianfengling, sp. nov. (A) Epigynum, ventral view; (B) vulva, dorsal view; (C–E) male left palp: (C) prolateral view, (D) ventral view, (E) retrolateral view. Scale bars 0.3 mm.