Synema revolutum, Tang & Li, 2010

Tang, Guo & Li, Shuqiang, 2010, Crab spiders from Xishuangbanna, Yunnan Province, China (Araneae, Thomisidae) 2703, Zootaxa 2703, pp. 1-105 : 80-82

Synema revolutum sp. nov.

Figs 60–62

Type material. Holotype: ♂, CHINA: Yunnan, Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Secondary tropical montane evergreen broad-leaved forest (N21º57.784', E101º11.947', 895 m), 6 August 2007, leg. G Zheng.

Paratypes: 1 ♀, CHINA: Yunnan, Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Secondary tropical seasonal moist forest (N21º54.718', E101º16.940', 645 m), 27 July 2007, leg. G. Zheng.

Etymology: The specific name comes from the Latin word revolutus (turned over or rolled back), referring to the embolus twisted dorsally, adjective.

Diagnosis: This species can be distinguished from other members of this genus by the unique shape of embolus.

Description. Male (holotype measured): Total length 5.00. Prosoma 2.40 long, 2.50 wide; opisthosoma 2.70 long, 2.20 wide. Dorsal shield of prosoma blackish green. Eye tubercle grayish white. Eye measurements: AME 0.11; ALE 0.17; PME 0.07; PLE 0.10; AME–AME 0.30; AME–ALE 0.22; PME–PME 0.40; PME–PLE 0.36. MOA length 0.46 with front width 0.50 and back width 0.56, Chelicerae, gnathocoxae and labium blackish brown, sternum green. Legs I, II black with many spines and densely hairs. Spination: Femur I prolateral 1-1-1, I–IV dorsal 1-1-1-1; patella I–IV dorsal 1(weak)-1; tibia I–II prolateral 1-1-1, dorsal 1-1, I ventral 2(long)-1-2-2-1-2, II ventral 2(long)-2-2, III–IV pro- and dorsal 1-1, retrolateral 1, III–IV ventral1-2-2, III pro- and retroalteral 1, IV pro-, retrolateral 1-1; metatarsus I–II pro- and retrolateral 1-1-1, ventral 2-2-2, III–IV pro- and retrolateral 1-1, ventral 2- 2. Leg measurements: I: 10.40 (3.20, 3.70, 2.20, 1.30); II: 10.50 (3.40, 3.70, 2.20, 1.20); III: 5.60 (1.90, 2.00, 1.00, 0.70); IV: 5.80 (1.80, 2.10, 1.10, 0.80), leg formula: 2143. Opisthosoma dorsally blackish brown with a white stripe in the anterior part and 2 pairs of white spots in the posterior part.

Palp ( Figs 60 B–D, 62 A–B). VTA short triangular, RTA large; tegulum flat, embolus slender, curved, distally pointed.

Female (one of the paratypes measured): Total length 5.30. Prosoma 2.20 long, 2.20 wide. Opisthosoma 3.10 long, 2.80 wide. Body pigmentation lighter than in male. Eye measurements: AME 0.11; ALE 0.16; PME 0.07; PLE 0.10; AME–AME 0.40; AME–ALE 0.27; PME–PME 0.53; PME–PLE 0.47. MOA length 0.60 with front width 0.60 and back width 0.67. Spination: Femur I prolateral 0-0-1, I–II dorsal 1-1-1-1, III–IV dorsal 1-1-1; patella I–IV, dorsal 1(weak)-1; tibia I prolateral 0-1, I–II retrolateral 1-1-1, I ventral 2(long)-1-2-2-1-1-2, Pro- and retrolateral 1, II ventral 2(long)-2-2-1-2, prolateral 1-1, retrolateral 1-1-1; III–IV pro- and retrolateral 1-1, III ventral 2(long)-1-2; IV ventral 1(long)-1(long)-2; metatarsus I–II pro- and retrolateral 1-1-1, ventral 1-2-2-2, III–IV pro- and retrolateral 1-1, ventral 2-2; leg measurements: I: 7.00 (2.20, 2.60, 1.30, 0.90); II: 7.40 (2.40, 2.80, 1.30, 0.90); III: 4.20 (1.40, 1.50, 0.80, 0.50); IV: 4.30 (1.50, 1.50, 0.80, 0.50), leg formula: 2143. Markings on dorsal opisthosoma similar as in male.

Epigynum ( Figs 61 B–C, 62 C–D). Epigynum with a posteriorly situated atrium; copulatory ducts small and twisted; spermatheca large, convoluted.

Distribution: China (Yunnan).