Otacilia onoi, 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 : 414-415

publication ID

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



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scientific name

Otacilia onoi

sp. nov.

Otacilia onoi View in CoL sp. n. ( figs 652-656 View Figs 642 - 648 , map 34 View Map 34 )

Type locality. — Thailand, Phra Khanong (13°42'N, 100°36'E, near Bangkok). GoogleMaps

Type material.— Holotype ♂ from the type locality, 26-31.iii. 1990, V. and B. Roth ( CAS); paratypes, 3 ♂, 3 ♀. same data ( 2 ♂ 2 ♀ CAS GoogleMaps , 1 ♂ 1 ♀ CD GoogleMaps ).

Other material.— None.

Diagnosis. — A small uniform olive-grey species, with dark femora contrasting with light distal leg segments. The posterior eyes are equidistant. Males are identifiable by the shape of the retrolateral and the dorsal palpal tibial apophysis. In females, the arrangement of the dark elements in the epigyne is diagnostic; the openings are wide, situated anteriorly, thick-walled and crescent-shaped. Leg spine numbers on femora in females differ from that in males.

Description.— MALE. Total length 2.15 mm. Carapace length 1.05 mm, width 0.85 mm, height 0.30 mm, head width 0.45 mm, eye group width 0.35 mm; abdomen 1.10 mm long, 0.60 mm wide. Leg lengths: leg 13.90 mm (1.00-1.50-0.90-0.50), leg 113.10 mm (0.85-1.05- 0.70-0.50), leg III 2.85 mm (0.75-0.80-0.75-0.55), leg IV 4.40 mm (1.15-1.40-1.20-0.65), palp 0.40-0.20-0.15+apophysis 0.20-0.40 mm. Carapace, chelicerae, femora, apical ring of tibiae and dorsal abdomen olive grey, head a little lighter, endites, coxae, sternum, dorsal side of tibia and metatarsi and tarsi and venter pale. Eyes: d AME=d ALE=d PLE= 11/2 d PME, PE equidistant, their diameter apart. Chelicerae with I tooth or 2 joint teeth on the retromargin and one frontal spine. Leg spination: all femora with 1 dorsal spine proximally, femur I with 3pl distally, tibia I with 7 pairs of ventral spines, tibia II 6 pairs, metatarsus I with 4 pairs, metatarsus II with 1-1-1-1 pl and 1-1-1rl, posterior legs spineless. Dorsal scutum over4/5 of abdomen, ventrally lacking scuta. Palp figs 652-653 View Figs 642 - 648 , femur with ventrally a large, broad triangular blunt apophysis ( fig.654 View Figs 642 - 648 ), tibia with a long and thin dorsal apophysis, retrolateral apophysis broad concave, with V-shaped excavation ( fig. 653 View Figs 642 - 648 ).

FEMALE. Total length 2.20 mm. Carapace length 1.00 mm, width 0.90 mm, head width 0.45 mm, width eye region 0.30 mm; abdomen 1.35 mm long, 0.75 mm wide, epigyne 0.25 mm wide. Leg lengths: leg I 3.90 mm (1.00-1.40-0.95-0.55), leg II 3.10 mm (0.85- 1.00-0.75-0.50), leg III 2.85 mm (0.75-0.90-0.75-0.45), leg IV 4.40 mm (1.15-1.40-1.15- 0.70), palp 0.40-0.20-0.25- 0.70 mm. Carapace, eyes, mouthparts and legs as in male. Femora all with 1 basal dorsal spine, femur I with a row of 4 strong pl spines, femur II with 2 spines; tibia I with 7-8 ventral pairs, tibia II with 5-6, metatarsus I with 4 pairs, metatarsus II with 3-4 pairs. Abdomen lacking scutum. Epigyne fig. 655 View Figs 642 - 648 , area in front of opening slightly depressed. Vulva fig. 656 View Figs 642 - 648 .

Distribution.— Only known from type locality.

Etymology.— Dedicated to Hirotsugu Ono.

Note.— Together with the specimens of O. onoi listed above, one similar-sized male of another, closely related species was found. This male is distinct by the pale coloured leg femora, in the palp the femoral apophysis is much reduced, the dorsal tibial apohysis is wider, shorter and curved and is fused at the base with the retrolateral apophysis, the latter is rectangular; the embolus is longer. The posterior eyes are equidistant.


USA, California, San Francisco, California Academy of Sciences













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