Orthobula pura, Deeleman-Reinhold, Christa, 2001

Deeleman-Reinhold, Christa, 2001, Forest Spiders of South East Asia With a revision of the sac and ground spiders (Araneae: Clubionidae, Corinnidae, Liocranidae, Gnaphosidae, Prodidomidae and Trochanteriidae)., Forest Spiders of South East Asia With a revision of the sac and ground spiders- Family Liocranidae, Leiden, Netherlands: Brill Leiden; Boston; Köln, pp. 400-505 : 437

publication ID

https://doi.org/ 10.5281/zenodo.814704



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scientific name

Orthobula pura

sp. nov.

Orthobula pura sp. n. ( figs 712-714 View Figs 705 - 711 , map 36 View Map 36 )

Type locality.— Indonesia, N Sulawesi, Dumoga Bone National Park .

Material examined. — Holotype ♀, Dumoga Bone, Barney’s subcamp (300 m), pitfall trap and leaf litter sifting, 24.x. 1985 and 5.xi. 1985, R. Bosmans ( KBIN 0 22, I.G.26977 ); Dumoga watershed protection area near Doloduo, primary forest , 1 ♀, epigyne lost, from leaf litter, 27-30.vii.1982, P.R. and C.L. Deeleman.

Diagnosis.— O. pura is distinguished from all other Orthobula except yaginumai and an undescribed species from Thailand by the colour of the abdomen which is dull grey with rows of ivory round spots radially on the sides and transverse creamy bars on the rear part; furthermore by the sculpture of the carapace: the impressions are very shallow and relatively scarce. The posterior median eyes are smaller than the posterior lateral eyes and oval. The retroventral surface of patella and tibia III and IV and adjacent parts of femur and metatarsus are black. The epigynal openings and the basal knot of bursae are small, close together and near the spermathecae.

Description. — Female. Total length 2.20 mm. Carapace length 1.05 mm, width 0.80 mm, height at coxae II 0.30 mm, head width 0.45 mm, width eye region 0.35 mm; abdomen 0.80 mm long, 0.70 mm wide. Leg lengths: leg I 2.40 mm (0.75-0.85-0.50-0.30), leg II 2.25 mm (0.65-0.85-0.50-0.25), leg III 2.05 mm (0.60-0.70-0.50-0.25), leg IV 2.40 mm (0.65-0.80-0.65-0.30), palp 0.25-0.15- 0.12-0.45 mm. Carapace, mouthparts and sternum deep orange, carapace with pale grey scribbles on sides, legs pale orange, in leg III and IV a black line running along retroventral side from femur to base of metatarsus. Abdomen ( fig. 712 View Figs 705 - 711 ) dorsally dark grey, two impressed dots in middle surrounded by creamy white, 4-5 parallel lines of round white dots running along sides of abdomen, posterior part of dorsum traversed by 4 transverse white bars. Underside of abdomen plain grey. Carapace smooth and shiny, sides with indistinct impressions, margin vaguely denticulate, d ALE almost 2x d AME, AME nearly juxtaposed; PME oval, diameter of PLE almost 2 x the lesser diameter of PME, the latter separated by 1/2 d PLE from laterals and 1 d from each other. Sternum with sparce round impressions. Ventral and lateral surface of anterior femora with tubercles. Leg spination: tibia I with 6 pairs of ventral spines, tibia II with 5 pairs; metatarsus I and II with 2-2-2-2v, tarsus I and II with 2-2v, rest spineless. Abdomen shiny. Epigyne ( fig. 713 View Figs 705 - 711 ) a squarish plate with round depression in posterior half; two small pairs of dark round spots in vulva seen shimmering through tegument. Vulva ( fig. 714 View Figs 705 - 711 ) with small openings and knob-like bursal base close together in front of spermathecae; large membranous bursae with a cluster of tiny chitinous teeth medio-apically.

MALE unknown.

Distribution. — Only known from the type locality in northern Sulawesi.

Etymology.— pura (Lat.) = smooth, without ornamentation, referring to the carapace surface.


Belgium, Brussels, Institut Royal des Sciences Naturelles de Belgique













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