Oxytate capitulata, Tang, Guo & Li, Shuqiang, 2009

Tang, Guo & Li, Shuqiang, 2009, Three new crab spiders from Xishuangbanna Rainforest, southwestern China (Araneae: Thomisidae), Zootaxa 2109, pp. 45-58 : 55-57

Oxytate capitulata sp. nov.

Figs 7–9

Type material: Holotype: male, CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town, secondary tropical seasonal moist forest (N21º54.718', E101º16.940', alt. 645 m), 27 July 2007, G. Zheng ( IZCAS, Zheng_sp1106). Paratypes: 7 males, 9 females, same data as holotype. 1 female ( IZCAS), Xishuangbanna, Mengla County, Menglun Town, primary tropical seasonal rain forest (N21º55.035', E101º16.500', alt. 558 m), 22 July 2007, G. Zheng ( IZCAS); 1 male, secondary tropical seasonal moist forest (N21º54.607', E101º17.005', alt. 633 m), 28 July 2007, G. Zheng ( IZCAS); 1 female, primary tropical seasonal rain forest (N21º57.445', E101º12.997', alt. 744 m), 30 July 2007, G. Zheng ( IZCAS); 1 female, secondary tropical montane evergreen broad-leaved forest (N21º54.767', E101º11.431', alt. 880 m), 6 August 2007, G. Zheng ( IZCAS).

Etymology. The specific epithet is taken from the Latin adjective capitulata and means smallheadshaped, refers to the shape of the distal RTA, adjective.

Diagnosis. The female of this new species is similar to Oxytate guangxiensis He & Hu, 1999 , but can be distinguished by the parallel hoods (in 90º angle in O. guangxiensis ), the short copulatory duct (copulatory duct/spermatheca is 1.2 but 2.0 in O. guangxiensis ). The male is similar to O. forcipata Zhang & Yin, 1998 , but can be distinguished by the birdhead-shaped apex of RTA (forcipiform in O. forcipata ). This species can also be easily recognized from O. hoshizuna Ono, 1978 by the distally bifid RTA (curved digitiform without bifurcaton in O. hoshizuna ).

Description. Male (measurements of holotype): Total length 5.80. Prosoma length 2.20, width 2.20; opisthosoma length 3.80, width 1.10. Prosoma flat, yellow. Tubercle grayish white. Eye measurements: AME 0.07; ALE 0.09; PME 0.06; PLE 0.08; AME–AME 0.11; AME–ALE 0.11; PME–PME 0.11; PME–PLE 0.26. MOA length 0.28 with front width 0.23 and back width 0.23. Chelicerae, gnathocoxae, labium and sternum light yellow. Legs yellow with many spines. Spination: Femur I prolateral 1-1-1-1, I–II dorsal 1-1-1-1-1, retrolateral 1 (apical), III–IV dorsal 0-0-1-1-1, prolateral 1(apical); patella I–IV, pro- and retrolateral 1, dorsal 1(weak)-1; tibia I–II dorsal, pro- and retrolateral 1-1, ventral 2-2-2-2, III–IV dorsal, pro- and retrolateral 1-1; metatarsus I–II pro- and retrolateral 1 (proximal), ventral 2-2-2-2, III–IV, pro- and retrolateral 1-1, ventral 2-0. Leg formula: I, II, IV, III; leg measurements: I: 11.00 (3.30, 4.30, 2.20, 1.20); II: 10.90 (3.30, 4.20, 2.20, 1.20); III: 5.20 (1.50, 2.20, 1.10, 0.60); IV: 5.30 (1.80, 1.80, 1.10, 0.60). Opisthosoma cuneiform, dorsum yellow with broken silvery spots, and with some setae posteriorly, venter yellow.

Palp ( Figs 7 B–D, 9A–B). VTA short, digitiform; RTA long, the tip birdhead-shaped. Bulb flat, sperm ducts visible, embolus spiniform.

Female (measurements of paratype). Total length 7.10. Prosoma length 2.30, width 2.30. Opisthosoma length 4.70, width 1.70. Body color lighter than in male. Eye measurements: AME 0.06; ALE 0.11; PME 0.05; PLE 0.09; AME–AME 0.12; AME–ALE 0.12; PME–PME 0.13; PME–PLE 0.30. MOA length 0.31 with front width 0.25 and back width 0.25. Spination: Femur I prolateral 1-1-1-1 (weak), II prolateral (all weak) 1-0-1-1; patella I–IV, dorsal 1 (apical); tibia I–II pro- and retrolateral 1-1-0, ventral 2-2-2-2; metatarsus I–II pro- and retrolateral 1 (proximal), ventral 2-2-2-2. Leg formula: 1234; leg measurements: I: 10.70 (3.20, 4.30, 2.10, 1.10); II: 10.40 (3.10, 4.10, 2.10, 1.10); III: 5.40 (1.40, 2.10, 1.30, 0.60); IV: 5.10 (1.80, 1.70, 1.00, 0.60). Opisthosoma dorsum with broken silvery spots, also with weak setae posteriorly.

Epigynum ( Figs 8 B–C, 9C–D). Epigynum with an anterior hood paramedially; copulatory openings located posteriorly; copulatory ducts twisted, hook-shaped, and connectedto the anterior portion of spermathecae; spermathecae oval.

Variation. Total length, male: 5.70–6.20 (n=9); female: 7.00–7.30 (n=12).

Distribution. China (Yunnan).

Figures

FIGURE 7. Oxytate capitulata sp. nov. A male habitus, dorsal; B – D male palp (B ventral, C prolateral, D retrolateral). Scale bars: A = 1.0 mm; B – D = 0.1 mm.

FIGURE 8. Oxytate capitulata sp. nov. A female habitus, dorsal; B epigynum, ventral view; C. vulva, dorsal view. Scale bars: A = 1.0 mm; B – C = 0.1 mm.

FIGURE 9. Oxytate capitulata sp. nov. A – B left male palp (A ventral, B retrolateral); C epigynum, ventral view; D vulva, dorsal view. Scale bar: A – D = 0.1 mm.