Cryptachaea uncina, Gao & Li, 2014

Gao, Cai-Xia & Li, Shu-Qiang, 2014, Comb-footed spiders (Araneae: Theridiidae) in the tropical rainforest of Xishuangbanna, Southwest China, Zoological Systematics 39 (1), pp. 1-135 : 33

Cryptachaea uncina sp. nov. ( Figs 26–29 )

Holotype ♂, China, Yunnan, Xishuangbanna, Menglun Nature Reserve , primary tropical seasonal rainforest (21º57.669'N, 101º11.893'E), 19–26 March 2007, Guo Zheng leg.

Paratypes: 2♂, 1♀, Xishuangbanna , Menglun Nature Reserve, primary tropical seasonal rainforest (21º57.445'N, 101º12.997'E), 5–12 September 2006, Guo Zheng leg. ; 2♂, 1♀, Menglun , Paramichelia baillonii plantation (about 20 years) (21º53.823'N, 101º17.072'E), 19–25 November 2006, Guo Zheng leg.

Etymology. The specific name derives from the Latin adjective uncinus and means hooked, in reference to the median apophysis with hooked outgrowth.

Diagnosis. The new species is somewhat similar to C. riparia , but can be distinguished by the median apophysis with a long outgrowth; conductor umbrellalike; copulatory ducts long and curved.

Male (measurements of holotype). Total length 1.45. Prosoma 0.73 long, 0.66 wide, yellow, with black stripes. Sternum 0.46 long, 0.46 wide, grey with setae. Opisthosoma 0.83 long, 0.69 wide, pale, with black stripes, white spots, without colulus. Eye measurements: AME 0.08, ALE 0.06, PME 0.06, PLE 0.06, AME-AME 0.04, AME-ALE 0.03, PME-PME 0.04, PME-PLE 0.03. Clypeus height about 2.92 times AME diameter, yellow. Chelicerae: yellow, with 2 anterior teeth; fangs long, slender. Endites: 0.25 long, 0.11 wide, yellow to grey, with brown pro-edges. Labium fused with sternum, 0.06 long, 0.14 wide, with 2 setae, yellow to grey. Leg measurements: I 3.62 (1.09, 0.30, 0.90, 0.78, 0.55); II 2.49 (0.78, 0.30, 0.68, 0.28, 0.45); III 2.28 (0.65, 0.25, 0.50, 0.44, 0.44); IV 2.93 (0.86, 0.30, 0.71, 0.58, 0.48). Leg I yellow, without spot; femur with 2 rows of spines; patella with 1 distal spine; tibia with many spines; metatarsus with many spines, trichobotria; tarsus with many spines. Legs II–IV similar to leg I, yellow, without spot. Pedipalpus ( Figs 26A–B , 27A–C , 29A–D ): tibia yellow, with black spots, 2 trichobothria; cymbium yellow, with black spot; paracymbium hooked; subtegulum small; tegulum large; median apophysis large, with long hooked outgrowth; embolus short, without apophysis; conductor membranous, umbrellalike; tegular apophysis distally forked.

Variation. Male paratypes. Total length 1.40–1.45; prosoma 0.69–0.75 long, 0.63–0.65 wide; sternum 0.44–0.48 long, 0.44–0.48 wide; opisthosoma 0.80–0.88 long, 0.68–0.69 wide.

Female (measurements of paratypes). Total length 1.50–1.88. Prosoma 0.80–0.84 long, 0.61–0.69 wide, yellow, with black stripes. Sternum 0.41–0.50 long, 0.41–0.50 wide, grey. Opisthosoma 1.00–1.06 long, 0.81–0.90 wide, pale, with black stripes, white spots. Legs yellow, similar to male. Epigynum ( Figs 26C–D , 28A–B ): epigynum with triangular scape; copulatory openings distinguishable; spermathecae circular, with crimpled, semicircular dent; copulatory ducts long, curved, originating from bottom of spermathecae, opening to anterior margin of atrium; fertilization ducts short, segmented.

Distribution. Only known from type locality (Yunnan).

Figures

Fig. 26. Cryptachaea uncina sp. nov., holotype male and paratype female. A. Pedipalpus, prolateral view; B. Pedipalpus, retrolateral view; C. Epigynum (vulva), ventral view; D. Epigynum (vulva), dorsal view. Scale bars = 0.10mm.

Fig. 27. Cryptachaea uncina sp. nov., holotype male. A. Pedipalpus, ventral view; B. Conductor, ventral view; C. Embolus, ventral view. Scale bars = 0.10 mm.

Fig. 28. Cryptachaea uncina sp. nov., holotype male and paratype female. A. Epigynum (vulva), ventral view; B. Epigynum (vulva), dorsal view; C. Male habitus, dorsal view; D. Male habitus, lateral view; E. Female habitus, dorsal view. Scale bars: A–B = 0.10mm, C–E = 0.50mm.

Fig. 29. Cryptachaea uncina sp. nov., holotype male. A. Pedipalpus (cymbium removed), ventral view; B. Pedipalpus, ventral view; C. Pedipalpus, prolateral view; D. Pedipalpus, retrolateral view. Scale bars = 0.05mm.