Comb-footed spiders (Araneae: Theridiidae) in the tropical rainforest of Xishuangbanna, Southwest China Author Gao, Cai-Xia Author Li, Shu-Qiang text Zoological Systematics 2014 39 1 1 135 journal article 10.11865/zs20140101 2095-6827 7475365 D500B21F-511A-4B49-9968-9F51F1606427 Theridion echinatum sp. nov. ( Figs 84–86 ) Holotype ♂ , China , Yunnan , Xishuangbanna , Menglun , primary tropical seasonal rainforest ( 21º55.035'N , 101º16.500'E ), 22 July 2007 , Guo Zheng leg. Paratype 1♂ , Menglun Nature Reserve , secondary tropical seasonal moist forest ( 21º54.718'N , 101º16.940'E ), 27 July 2007 , Guo Zheng leg. Etymology. The specific name derives from the Latin adjective echinatus and means spiny, in reference to the cymbium with a strong spine. Diagnosis. The new species is very similar to T. albioculum , but can be distinguished by having the median apophysis with a process and the conductor membranous. Male (measurements of holotype ). Total length 3.20. Prosoma 1.30 long, 1.23 wide, flat, pale yellow, with black © Zoological Systematics , 39 (1): 1–135 Fig. 80. Theridion circuitum sp. nov. , holotype male. A. Pedipalpus (cymbium removed), ventral view; B. Pedipalpus, ventral view; C. Pedipalpus, prolateral view; D. Pedipalpus, retrolateral view. Scale bars = 0.05 mm. © Zoological Systematics , 39 (1): 1–135 stripes, 4 setae. Sternum 0.68 long, 0.63 wide, yellow, with setae. Opisthosoma 1.65 long, 1.35 wide, pale, with black transverse stripes, without colulus. Eye measurements: AME 0.13, ALE 0.09, PME 0.09, PLE 0.09, AME-AME 0.09, AME-ALE 0.03, PME-PME 0.09, PME-PLE 0.09. Clypeus height about 2.50 times AME diameter, yellow, with 3 setae. Chelicerae: yellow, with 2 anterior teeth, 1 spine; fangs long and slender. Endites: 0.32 long, 0.20 wide, yellow, with brown pro-edges. Labium fused with sternum, 0.08 long, 0.25 wide, with many setae, yellow. Leg measurements: I 7.76 (2.30, 0.63, 1.60, 2.13, 1.10); II 5.58 (1.75, 0.50, 1.23, 1.30, 0.80); III 3.96 (1.15, 0.33, 0.85, 1.00, 0.63); IV 5.11 (2.00, 0.50, 0.88, 1.10, 0.63). Leg I coxa pale yellow, without spot; femur pale yellow, without spot; patella pale yellow; tibia yellow, without spot; metatarsus and tarsus grey; femur without strong spine, patella with 2 strong spines; tibia with 2 rows of spines; metatarsus and tarsus with many spines, trichobothria. Legs II–IV similar to leg I femur II–IV yellow, with black spot; tibia II, III yellow, with black ring; metatarsus II, III grey, with black ring; tibia II grey, with black ring; tibia II–IV with 2 strong spines. Pedipalpus ( Figs 84A–B , 85A–B , 86A–D ): tibia yellow, with 2 trichobothria; cymbium yellow, with long spine; paracymbium hooked; subtegulum broad; tegulum confined; median apophysis with long apophysis; embolus long, flagelliform, with basal hollow; conductor membranous; tegular apophysis long. Fig. 81. Theridion cygneum sp. nov. , holotype male. A. Pedipalpus, prolateral view; B. Pedipalpus, retrolateral view. Scale bar = 0.10 mm. Variation. Male paratype . Total length 2.85; prosoma 1.33 long, 1.20 wide; sternum 0.75 long, 0.75 wide; opisthosoma 1.38 long, 1.08 wide. Leg I coxa yellow, without black spot; femur yellow, with black spot; patella yellow, © Zoological Systematics , 39 (1): 1–135 Fig. 82. Theridion cygneum sp. nov. , holotype male. A. Pedipalpus, ventral view; B. Embolus, ventral view. Scale bars = 0.10 mm. without spot; tibia yellow, with black spot; metatarsus and tarsus grey. Legs II–IV femora yellow to grey; patella, tibia, metatarsus and tarsus grey. Female. Unknown. Distribution. Only known from type locality ( Yunnan ).