Otacilia sinifera, 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 : 417-419

publication ID

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



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scientific name

Otacilia sinifera

sp. nov.

Otacilia sinifera View in CoL sp. n. ( figs 665-669 View Figs 665 - 669 , map 34 View Map 34 )

Type locality. — Thailand, Nakhon Ratchasima Province, Khao Yai National Park.

Type material.— Holotype ♂ from the type locality, appr. 1000 m, in Eucalyptus leaf litter, 8.xi. l987, C.L. and P.R. Deeleman; paratypes: 3 ♂, 1 ♀ same data, Eucalyptus , bamboo and evergreen forest litter, xi. 1987 and xii.1988.

Other material.— C Thailand, Nakhon Nayok Province, 1 ♀, Sarika waterfalls, bamboo litter , 27.iv. 1982, P.R. Deeleman.

Diagnosis. — A species which is recognisable, also in the field, by the white spot dorsally in front of the spinnerets contrasting with the adjacent black semicircular ring. Close to O. lynx , it differs from that species by the abdominal pattern and in the male palp by the relatively smaller embolus, the presence of a small tegular apophysis and the upturned apophysis distally on the femur. In the vulva, the opening pouches, bursae and spermathecae are more approached to the middle than in lynx . Distinct from species in the arma ­ tissima complex by the absence of transverse bars on the abdomen, the higher number of spines on the anterior femora and tibiae and the smaller epigyne with different pathway of the insemination ducts. The male palp is of similar structure to that in the male type of Palaetyra luzonica , the latter lacks the ventral projection on the palpal femur and bears a larger palpal tibial apophysis. O. sinifera has relatively longer legs than other similarly sized species.

FEMALE. Total length 4.40 mm. Carapace length 1.60 mm, width 1.40 mm, head width 0.70 mm, width eye region 0.50 mm; abdomen 2.80 mm long, 1.80 mm wide. Leg lengths: leg I 8.15 mm (2.00-2.90-1.85-1.40), leg II 6.35 mm (1.60-2.25-1.45-1.05), leg III 5.55 mm (1.40-1.80-1.45-0.90), leg IV 8.35 mm (2.20-2.55-2.40-1.20), palp 0.60-0.28-0.44- 0.68 mm. Carapace, eyes, mouthparts and legs as in male. Clypeus less than 1 eye diameter. Abdomen lacking scutum. Epigyne appearing as a pair of S-shaped sclerotizations, the openings in large sclerotized pouches. Vulva ( fig. 669 View Figs 665 - 669 ) anteriorly with a pair of large transparent bursae set between openings and spermathecae. Spermathecae thick-walled, numerous thorn-like specks appear all over their surface, further with 4 or more globules on filiform stems and a number of thorns.

Data on behaviour. — The species was found in leaf litter of dry, secondary or exotic ( Eucalyptus ) leaf litter. One subadult male kept alive surrounded itself in a cell which was quite large in relation to the size of the spider.

Distribution. — Only known from type locality.

Etymology.— The Latin word sinifera means wearing a sinus (= pocket), referring to the large membranous sac in the vulva.













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