Oedignatha barbata, 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 (Oedignatha), Leiden, Netherlands: Brill Leiden; Boston; Köln, pp. 261-276 : 271-273

Oedignatha barbata sp. n.

(figs 362-366, map 20)

Type locality. — N Thailand. Doi Suthep.

Type material. — Holotype ♂ ( MHNG), pitfall trap, Doi Suthep, 1180 m, 30.v-2. vii.1987 ; paratypes: 2 ♂. 2.vii-2.viii.1987, id . 1 ♀. 28.vii.-29.viii.1986, id ., 1 ♀, 29.xiii- 30.ix.1996, id ., 1 ♀, 1200 m, 2.viii. 1987. all MHNG, id .. 2 ♂ ( CD), 30.v-2.vii.1987, id .. 1 ♀ ( CD), 22.iv-7.vi.1986, all P. Schwendinger .

Other material. — N Thailand, Doi Inthanon. 1630 m, 1 ♀, 25.ii.1987, P. Schwendinger ( MHNG) ; Fang District, Doi Angkhang . 920 m, 1 ♂ ( CD). 18.iii. 1987. P. Schwendinger ; Phra Khanong (13°42'N, 100°36'E. near Bangkok), 1 ♀, 1 sub ♂, 26-31.iii.1990, V. and B. Roth ( CAS) .

Diagnosis. — Differs from all other described species by the “barbed” frontal surface of the chelicerae, further distinct by the head being lighter than the thorax, the contrastingly coloured legs, the angular clypeal hump, the massive protruding chelicerae in males. the palpal tibial apophysis and bulb, and the epigyne. O. sima Simon has much larger AME. shorter palpal tibia in the male and differently shaped branches of the tibial apophysis. O. rugulosa Thorell from Myanmar (Burma) differs from both O. jocqitei and 0. barbata by the absence of a clypeal hump, O. ferox (Thorell) is much larger and has more enlarged chelicerae in females. adapted to digging. Closely related to O. b ucculenta Thorell; this species is distinct by leg IV longer than leg I. the higher number of cheliceral teeth, 9 pair of tibial spines on leg 1 and a different configuration of the vulva.

Description. — MALE. Total length 4.25 mm. Carapace length 2.00 mm, width 1.40 mm. height 0.75 mm, head width 1.05 mm. eye group width 0.75 mm; abdomen length 2.25 mm, width 1.35 mm. Leg lengths: leg I 6.35 mm (1.65-2.15-1.65-0.90), leg II 5.15 mm (1.40-1.70-1.25-0.80), leg II1 4.20 mm (1.00-1.35-1.20-0.65). leg IV 6.20 mm (1.50-2.05- 1.65-1.00), palp 0.80-0.35-0.45- 0.55 mm. Carapace and abdomen dark brown, head reddish brown. legs with middle brown femora and tibiae with light tips on tibiae I and IV. metatarsi and tarsi pale yellow. Carapace surface granulate. Clypeal hump angular. Chelicerae very massive and bulging, with a bundle of long thin curved hair on the anterior surface instead of a single spine pair as in other species; promargin with 3, retromargin with 7 teeth. Sternum almost smooth. Abdomen covered with scutum; ventrally a postgenital scutum reaching halfway spinnerets and a small pre-anal scutum. Leg spination: proximo-dorsal spine usually obsolete in femora, femur I with one prolateral distal spine: anterior tibiae and metatarsi not flattened ventrally, tibia I with 8 pairs of ventral spines, tibia II with 7pv. 6 rv. tibia II1 spineless, tibia 1V with 0-1 pv, metatarsi I with 5 pairs of

ventral spines, metatarsus II with 4 pairs, metatarsus III and IV with 1-0pv only. Male palp as in figs 365 and 366 , embolus relatively short, conductor with few features, no tegular apophysis is apparent.

FEMALE. Total length 5.15 mm. Carapace length 2.50 mm, width 1.80 mm, height 0.50 mm, head width 1.15 mm, eye group width 0.75 mm, abdomen length 2.75 mm, width 1.55 mm, epigyne 0.30 mm wide. Leg lengths: leg I 8.70 mm (2.00-2.65-1.85-1.00), leg II 6.75 mm (1.75-2.15-1.50-0.85), leg III 5.70 mm (l.50-l.70-1.35-0.80). leg IV 7.85 mm (2.10-2.60- 2.25-1.15), palp 1.00-0.45-0.65- 0.90 mm. Colour as the male, undersurface of abdomen dark brown with longitudinal rows of white spots (in one specimen only); colour pattern of legs as male. Chelicerae not so much bulging anteriorly as in male. shaped as in other species, Jong thin hair on frontal surface as in the male. Abdominal dorsal scutum of variable length, pre-anal scutum absent. Spine formula as the male, but sometimes more spines on anterior legs, tibia III with 0-1pv. tibia IV with 1-1rv, metatarsi III and IV with 1pv and 1rv. Epigyne (fig. 363) and vulva (fig. 364) similar to those in 0. jocquei . but spermathecae not larger than bursae and wider apart.

N.B. In the drawing of the palp, the conductor is shown in its normal position, however in all 6 males available the conductor was twisted in clockwise direction over 90°. No explanation is available for this phenomenon.

Distribution. — As in O. jocquei , found in the mountains Doi Suthep and Doi Inthanon at altitudes of 1100 - 1600 m; both localities harbour mixed populations with O. jocquei ; also in Doi Angkhang in the Fang District in Chiang Mai Province at 920 m. and in Phra Khanong, not far from Bangkok.

Etymology. — From barbata , adj. (Latin) = barbate, with beard (on the chelicerae).

Figures

Figs 365-366. Oedignatha barbata sp. n. 365. Male, palp, vental. 366. Retrolateral, cymbium and bulb omitted. 367-370. Oedignatha mogamoga (Kota Kinabalu). 367. Male, palp, ventral. 268. Retrolateral. 369. Epigyne. 370. Vulva in clove oil, ventral.