Otacilia zebra Deeleman-Reinhold, 2001, sp. n.

Otacilia zebra sp. n. (fig. 657-664, map 34)

Type locality. — N Thailand, Chiang Mai, Doi Inthanon, 1700-2530 m.

Type material.— Holotype ♂, 2530 m, 22.ii.1992; paratypes: 2 ♂, 5 ♀, same data, 1 ♂ 1 ♀, 2500 m, pitfall traps, 23.10 - 27.12.1986, 8 ♂, 16.ii-18. iv. 1987, 4 ♂, 2 ♀, 2500 m, 18.iv-23. v.1987, 1 ♀, 23.v-11. vi.1987, 7 9, 11.vi- 14. vii. 1987, 1 ♀, 2530 m, 14.vii- 20. viii. 1987, 1 ♂, 1 ♀, 2500 m, 20.viii-8. x. 1987, 3 ♂, 2 ♀, 20.viii-8. x. 1987, 1 ♀, 1700 m, 8. x.1987, 1 ♂, 2300 m, 27.xi. 1987 - 14. i. 1988, 2 ♂, 2500 m, 19. xii.1990, 1 ♂, 24. xi. 1996, 1 ♂, 2530 m, 23.ii. 1997, all P. Schwendinger (MHNG and CD).

Other material.— None.

Diagnosis.— A large, pale species with a series of conspicuous transverse black bars on the abdomen. A further distinctive character is the double, prong-shaped tibial apophysis in the male palp. The vulva is similar to that in ornatissima but can easily be recognised by the large lateral depression bordered by a semicircular hood.

Description.— MALE. Total length 3.50 mm. Carapace length 1.65 mm, width 1.30 mm, head width 0.90 mm, eye group width 0.50 mm; abdomen 1.75 mm long, 1.20 mm wide. Leg lengths: leg I 6.30 mm (1.60-2.35-1.60-0.75), leg II 5.05 mm (1.35-1.80-1.25-0.65), leg III 4.35 mm (1.15-1.40-1.15-0.65), leg IV 6.45 mm (1.80-2.00-1.75-0.90), palp 0.60- 0.25-0.25+apophysis 0.20-0.65 mm. Carapace, mouthparts and legs orange, femora, patellae and tibiae with a vague grey subapical band, abdomen (figs 657-658) pale buff with dorsally at one third a black transverse band interrupted in the middle, followed by 5 transverse bands and a black ring around the spinnerets. Eyes as in O. ornatissima, PME slightly larger and not more than 1 d apart. Chelicerae with 2 small teeth on the promargin and a third one near the base of the fang, a double tooth on the retromargin. Leg spination: all femora with 1 short dorsal spine proximally, femur I with 1-1-1-1pl, femur II with 1-1pd distally, tibia I with 7 pairs of ventral spines, tibia II 6-7 pairs of ventral spines, metatarsus I and II with 1-1 -1 -1pv and 1-1-1 rv, leg III and IV spineless. Abdomen dorsally with small scutum. Spinnerets fig. 661. Palp figs 659-660, femur with ventral ridge, tibia with a large apophysis consisting of a distally abruptly narrowing dorsal branch and a shorter retrolateral branch.

FEMALE. Total length 4.15 mm. Carapace length 1.75 mm, width 1.40 mm, head width 0.75 mm, width eye region 0.50 mm; abdomen 2.50 mm long, 1.65 mm wide, epigyne 0.50 mm wide. Leg lengths: leg I 6.05 mm (1.50-2.35-1.55-0.65), leg II 5.15 mm (1.35- 1.90-1.25-0.65), leg III 4.35 mm (1.20-1.45-1.10-0.60), leg IV 6.60 mm (1.70-2.10-1.85- 0.95), palp 0.65-0.30-0.40- 0.50 mm. Carapace, eyes, mouthparts and legs as in male. Metatarsus I with 4pv and 3rv, metatarsus II with 4pv and 2rv. Abdomen lacking scutum. Spinnerets fig. 662. Epigyne (fig. 663) with conspicuous lateral arch, surrounding a pair of large shallow depressions, in which in most specimens lies a black substance which is continued with a narrow string into the opening (plug) (fig. 664). This can be easily removed. Fertilisation ducts unusually large.

Distribution. — Only known from Doi Inthanon in N Thailand at altitudes between 1700 and 2530 m.

Etymology.— zebra, a noun in apposition, from the black-and-white striped abdomen.