Talaus sulcus, Tang & Li, 2010

Tang, Guo & Li, Shuqiang, 2010, Crab spiders from Xishuangbanna, Yunnan Province, China (Araneae, Thomisidae) 2703, Zootaxa 2703, pp. 1-105 : 93-98

Talaus sulcus sp. nov.

Figs 71–73

Type material. Holotype: ♂, CHINA: Yunnan, Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Anogeissus acuminate plantation (N21º53.993', E101º16.810', 611 m), 19 August 2007, leg. G. Zheng.

Paratypes: CHINA: Yunnan, Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , leg. G. Zheng: 1 ♂, 3 ♀, same data as holotype ; 1 ♂, 4 ♀, Secondary tropical seasonal moist forest (N21º54.390', E101º16.811', 612 m), 10 August 2007 ; 2 ♀, Paramichelia baillonii plantation (N21º54.772', E101º16.043', 556 m), 18 July 2007; 1 ♂, Paramichelia baillonii plantation (N21º54.200', E101º16.923', 608 m), 18 August 2007; 1 ♀, Secondary tropical seasonal moist forest (N21º54.607', E101º17.005', 633 m), 28 July 2007 ; 1 ♀, primary tropical seasonal rain forest (N21º55.035', E101º16.500', 558 m), 22 July 2007; 4 ♀, Secondary tropical seasonal moist forest (N21º54.718', E101º16.940', 645 m), 27 July 2007 ; 1 ♀, Paramichelia baillonii plantation (N21º54.200, E101º16.923, 608 m), 19 − 26 April 2007; leg. G. Tang and Z.Y. Yao: 1 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.705', E101º16.898', 656 m), 13 November 2009 ( Tang-Yao _ No. 4) ; 1 ♂, 4 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.609', E101º16.871', 633 m), 14 November 2009 ( Tang-Yao _ No. 6) ; 1 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.705', E101º16.898', 656 m), 15 November 2009 ( Tang-Yao _ No. 8) ; 1 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.710', E101º16.941', 652 m), 16 November 2009 ( Tang-Yao _ No. 10) ; 2 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.714', E101º16.935', 660 m), 16 November 2009 ( Tang-Yao _ No. 11) ; 1 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.609', E101º17.090', 643 m), 17 November 2009 ( Tang-Yao _ No. 13) ; 2 ♀, G213 roadside, Secondary forest (N21º54.459', E101º16.755', 644 m), 20 November 2009 (Tang-Yao _ No. 14) ; 2 ♂, 2 ♀, G213 roadside, Secondary forest (N21º54.459', E101º16.750', 640 m), 20 November 2009 (Tang-Yao _ No. 15) ; 1 ♂, G213 roadside, Bamboo plantation (N21º54.380', E101º16.815', 620 m), 21 November 2009 (Tang-Yao _ No. 16) ; 2 ♂, 6 ♀, same data as Tang-Yao _ No. 16 ( Tang-Yao _ No. 17) ; 1 ♀, G213 roadside, Bamboo plantation (N21º54.386', E101º16.803', 627 m), 22 November 2009 (Tang-Yao _ No. 18) ; 1 ♂, 7 ♀, G213 roadside, Bamboo plantation (N21º54.380', E101º16.815', 627 m), 22 November 2009 (Tang- Yao _ No. 19) ; 6 ♂, 11 ♀, Garbage dump, Secondary tropical forest (N21º54.380', E101º16.815', 627 m), 23 November 2009 ( Tang-Yao _ No. 20) ; 2 ♂ 8 ♀, same data as Tang-Yao _ No. 20 ( Tang-Yao _ No. 21) ; 3 ♀, G213 roadside, High plantation forest (N21º54.213', E101º16.927', 590 m), 24 November 2009 (Tang-Yao _ No. 22) ; 4 ♀, same data as Tang-Yao _ No. 22 ( Tang-Yao _ No. 23) ; 2 ♀, G213 roadside, Bamboo plantation (N21º53.646', E101º16.975', 589 m), 26 November 2009 (Tang-Yao _ No. 26) ; 1 ♀, G213 roadside, Bamboo plantation (N21º53.622', E101º16.955', 581 m), 26 November 2009 (Tang-Yao _ No. 27) ; 1 ♀, G213 Roadside, Anogeissus acuminate Plantation (about 20 years old, N21º53.819', E101º17.075', 609 m), 27 November 2009 (Tang-Yao _ No. 28) ; 2 ♀, G213 roadside, low evergreen forest (N21º53.794', E101º17.152', 594 m), 27 November 2009 (Tang-Yao _ No. 29) ; 1 ♂, 3 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.555', E101º16.860', 615 m), 29 November 2009 ( Tang-Yao _ No. 32) ; 8 ♂, 9 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.555', E101º16.860', 610 m), 29 November 2009 ( Tang-Yao _ No. 33) ; 5 ♀, Tropical evergreen rainforest (N21º55.139', E101º16.295', 523 m), 30 November 2009 (Tang-Yao _ No. 35) ; 1 ♀, G213 Roadside, Anogeissus acuminate Plantation (N21º53.992', E101º16.948', alt. 596 m), 2 December 2009 (Tang-Yao _ No. 38) ; 1 ♂, 1 ♀, G213 roadside, Anogeissus acuminate plantation (N21º53.992', E101º16.948', 590 m), 2 December 2009 (Tang-Yao _ No. 39) ; 1 ♀, G213 roadside, Bamboo plantation (N21º53.640', E101º16.940', 580 m), 3 December 2009 (Tang-Yao _ No. 41) ; 1 ♀, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.614', E101º16.880', 642 m), 4 December 2009 (Tang-Yao _ No. 42) .

Etymology. The specific name comes from the Latin word sulcus (furrow, groove), referring to the palp with a tegular groove, noun in apposition.

Diagnosis. This new species can be distinguished from other members of this genus by the palpal tegulum with a small U-shaped groove. This species is similar to T. samchi Ono, 2001 , but can be separated from the latter by: palp without DTA (a denticle DTA in T. samchi ); epigynum with long copulatory ducts (short in T. samchi ). The female can also be distinguished from T. niger Tang et al., 2008 by the long, twisted copulatory ducts.

Description. Male (holotype measured): Total length 1.80. Prosoma 0.80 long, 0.85 wide; opisthosoma 1.00 long, 0.90 wide. Dorsal shield of prosoma blackish brown, with densely hairs and several sparse long setae on small tubercles. Eye measurements: AME 0.05, ALE 0.12, PME 0.03, PLE 0.06, AME − AME 0.10, AME − ALE 0.21, PME − PME 0.24, PME − PLE 0.22. MOA 0.22 long, front width 0.20, back width 0.30. Chelicerae, gnathocoxae, labium and sternum blackish brown. Femora I − IV black brown, other segments yellow, leg measurements: I: 1.92 (0.60, 0.66, 0.36, 0.30); II: 2.00 (0.64, 0.68, 0.38, 0.30); III: 1.34 (0.40, 0.50, 0.24, 0.20); IV: 1.36 (0.40, 0.50, 0.26, 0.20), leg formula 2143. Opisthosoma dorsally grayish black with long setae, posteriorly grayish yellow; venter grayish yellow.

Palp ( Figs 71 B–D, 73 A–B). VTA thicker and longer than RTA, tegulum with a prolateral blackish brown Ushaped groove, embolus long filiform.

Female (one of the paratypes measured): Total length 2.00. Prosoma 0.80 long, 0.95 wide; opisthosoma 1.20 long, 1.25 wide. Body pigmentation lighter than in male. Eye measurements: AME 0.05, ALE 0.11, PME 0.03, PLE 0.06, AME − AME 0.10, AME − ALE 0.24, PME − PME 0.30, PME − PLE 0.24. MOA 0.22 long, front width 0.24, back width 0.38. Leg measurements: I: 2.22 (0.76, 0.76, 0.40, 0.30); II: 2.30 (0.80, 0.76, 0.44, 0.30); legs III 1.58 (0.50, 0.58, 0.30, 0.20); IV: 1.66 (0.54, 0.60, 0.30, 0.22), leg formula 2143.

Epigynum ( Figs 72 C–F, 73 C–D). Epigynum with a pair of anteriorly situated copulatory openings, epigynum also with a posteriorly situated, tongue-shaped bulge which covered a hood; copulatory ducts long and twist; spermathecae stout.

Variation. The black markings varied in size on female dorsal opisthosoma. Palps usually grayish brown, some light brown. Total length: ♂ 1.50 − 1.85 (n=29), ♀ 1.90 − 2.30 (n=97).

Distribution. China (Yunnan).