Spilosynema ravum, Tang & Li, 2010

Tang, Guo & Li, Shuqiang, 2010, Crab spiders from Xishuangbanna, Yunnan Province, China (Araneae, Thomisidae) 2703, Zootaxa 2703, pp. 1-105 : 78

Spilosynema ravum sp. nov.

Figs 58–59

Type material. Holotype: ♀, CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Bamboo plantation (N21º53.622', E101º16.955', 581 m), 26 November 2009, G. Tang and Z.Y. Yao (Tang-Yao_No.27).

Paratypes: 2 ♀, same data as holotype .

Etymology. The specific epithet is taken from the Latin word ravus (gray), referring to this species with gray pigmentation, adjective.

Diagnosis. This new species can be distinguished from other members of this genus by the grayish general appearance and the unique epigynal organ.

Description. Female (holotype measured): Total length 3.90. Prosoma 1.60 long, 1.50 wide; opisthosoma 2.30 long, 1.90 wide. Dorsal shield of prosoma grayish yellow with long setae, sides grayish brown. Eye measurements: AME 0.06; ALE 0.12; PME 0.05; PLE 0.09; AME–AME 0.20; AME–ALE 0.19; PME–PME 0.30; PME–PLE 0.32. MOA length 0.30 with front width 0.31 and back width 0.41. Chelicerae, gnathocoxae and labium dark brown, sternum yellow with black hairs. Legs yellow; femora of I, II with grayish black spots. Leg spination: femur I prolateral 1-1-1, I–IV dorsal 1; patella I–IV dorsal 1(apical); tibia I–II pro- and retrolateral 1-1-1, ventral 2-2-2; metatarsus I–II pro- and retrolateral 1-1, ventral 2-2-2. Leg formula: 2143; leg measurements: I: 5.60 (1.70, 2.10, 1.10, 0.70); II: 5.70 (1.80, 2.10, 1.10, 0.70); III: 3.35 (1.10, 1.30, 0.50, 0.45); IV: 3.60 (1.20, 1.30, 0.60, 0.50). Opisthosoma dorsally grayish yellow with white spots, venter grayish yellow.

Epigynum ( Figs 58 C–D, 59 A–B). Epigynum with a posteriorly situated hood; copulatory openings situated bilaterally of the hood, the anterior part of copulatory ducts translucent, wide, the posterior part small-tube-shaped; spermathecae twisted, small tube-shaped.

Male: Unknown.

Distribution. China (Yunnan).

Variation. Total length: ♀ 3.90, 4.30, 4.30 (n=3). The markings on dorsal opisthosoma vary in pigmentation.

Remarks. This species is similar but different from other members of this genus in general appearance and genital organ; we place it in this genus provisionally as the epigyna of these four species vary greatly.