Weintrauboa yunnan, Yang & Zhu & Song, 2006

Yang, Zi-Zhong, Zhu, Ming-Sheng & Song, Da-Xiang, 2006, A Newly Recorded Genus And A New Species Of The Spider Family Pimoidae From Yunnan, China (Arachnida: Araneae), Raffles Bulletin of Zoology 54 (2), pp. 235-239 : 237-239

Weintrauboa yunnan , new species

( Figs. 1 - 4 )

Material examined. – Holotype - male ( MHBU), Mount Gong , Fengyi Town, 25 ° 30'N 100 ° 18'E, Alt. 2050 m, Dali City, Yunnan Province, China, coll. Zhi-Xiang Li, 4 Nov.2001.

Paratypes – 1 female ( MHBU), same data as holotype ; 1 male ( ZRC), same data as holotype ; 4 males ( DLC), same data as holotype ; 1 male ( DLC), Wenping town , 27 ° 11'N 103 ° 32'E, Ludian County, coll. Lian-Bing Zhou, 28 Jan.2005 ; 1 female ( ZRC), Yongren County, 26 ° 04'N 101 ° 41'E, coll. Hong-Ming Wang, 15 Feb.2005 .

Diagnosis. – The new species can be easily distinguished from the other two species by the unenlarged metatarsus I of male. It is quite similar to Weintrauboa chikunii (Oi, 1979) ( Hormiga, 2003: 276, Figs. 2 - 3 , 6 - 7), but differs from the latter by: the bifurcated base of embolus, the narrow ventral plate of the epigynum, the dorsally sphere-shaped spermathecae.

Etymology. – The species name is a noun in apposition taken from the type locality.

Description. – Male. Holotype: total length 5.10: cephalothorax 2.35 long, 2.04 wide; abdomen 3.06 long, 2.04 wide. Thoracic fovea conspicuous and oval, cephalic region

dark brown. Anterior eye row recurved, posterior eye row slightly recurved and slightly wider than anterior; ALE, PLE and PME with primary tapetum, AME absent. Eye sizes: AME 0.13, ALE 0.13, PME 0.13, PLE 0.15. AME - AME 0.13, PME - PME 0.13, ALE - PLE 0.03, AME - ALE 0.10, PME - PLE 0.15. MOA front width 0.35, back width 0.40. Clypeus height 2.69 times one AME diameter. Cephalic groove obvious. Chelicerae large, stridulatory striae absent, with 3 strong prolateral and 4 weak retrolateral teeth ( Fig. 1F ). Maxillae brown, longer than wide. Labium brown, wider than long. Sternum 1.53 long, 1.38 wide, chestnut, posterior margin pointed, slightly extending between coxae IV. Legs brown, slightly longer and slender, and autospasy at the patella-tibia junction; legs I - IV generally with dark annuli from femur to metatarsus, but metatarsus inconspicuous. Femur I 1.51 times the length of cephalothorax. Femora I - II with 2 dorsal spines; III - IV with 1 dorsal spine. Patellae I - IV with 1 dorsal spine. Tibiae I - IV with 2 dorsal spines, 1 prolateral and retrolateral spine, 3 pairs of ventral spines. Metatarsus I proximal third sinuous and unenlarged ( Fig. 2B ); metatarsi I - II with 1 prolateral and retrolateral spine, 1 pair of ventral spines; III - IV with 2 dorsal spines, 2 pairs of ventral spines. Superior claws with a tooth. Measurement of legs: I 13.87 (3.57 + 4.79 + 3.88 + 1.63); II 12.45 (3.37 + 4.18 + 3.47 + 1.43); III 8.47 (2.45 + 2.65 + 2.35 + 1.02); IV 10.20 (2.86 + 3.26 + 2.86 + 1.22). Leg formula: 1243. Palpal tibia wider than long, with 2 prolateral ( Fig. 4R ) and 1 retrolateral trichobothriae, fourteen thick macrosetae ( Fig. 4R ); distal end of cymbium finger - like ( Figs. 1C - E ); cymbial dorsoectal processes heavily sclerotized ( Fig. 4Q ), cuspules absent. posterior surface of dorsum of cymbium with rows cuspules ( Figs. 3M - N); embolus long ( Fig. 1C ), with membrane, embolic flap with a slightly sclerotized hook - shaped process ( Figs. 1C - E , 4S ), conductor small and thin ( Fig. 4T ); paracymbium connected with cymbium, cymbial sclerite spoon - shaped. Abdomen brown, dorsum with some dark brown patterns and white spots ( Fig. 1A ); ventral slightly light. Colulus brownish, approximately triangular, with six short setae. Tracheal spiracle narrowed, and be located before the spinnerets. Six spinnerets, ALS brownish, longer than PLS, PLS brown.

Female. Total length 5.20: cephalothorax 2.04 long, 1.63 wide; abdomen 3.47 long, 2.55 wide. Eye sizes: AME 0.10, ALE 0.13, PME 0.13, PLE 0.13. AME - AME equal to AME - ALE, 0.10, ALE - PLE 0.03, PME - PME 0.13, PME - PLE 0.15. MOA front width 0.30, back width 0.38. Clypeus height 2.60 times one AME diameter. Chelicerae with 3 strong prolateral and 5 weak retrolateral teeth. Sternum 1.22 long, 1.06 wide. Femur I 1.25 times the length of cephalothorax. Tibia with 1 prolateral and 2 retrolateral trichobothrium. Femora I - IV with 1 dorsal spine, I with 1 prolateral spine. Patellae I - IV with 2 dorsal spines. Tibiae I - IV with 2 dorsal, prolateral and retrolateral spines, 3 pairs of ventral spines. Metatarsi I - II with 1 prolateral and retrolateral spine, 1 pair of ventral spines, III - IV with 2 prolateral, retrolateral spines, 2 pairs ventral spines. Measurement of legs: I 9.49 (2.57 + 3.12 + 2.41 + 1.39); II 8.69 (2.48 + 2.84 + 2.18 + 1.19); III 7.04 (2.14 + 2.30 + 1.68 + 0.92); IV 8.11 (2.35 + 2.55 + 2.19 + 1.02). Legs formula: 1243. Epigynal plate narrow, epigynal shield wider; copulatory opening located on the base of epigynal plate; copulatory ducts long ( Figs. 2J - L ); fertilization ducts mesally pointed. Dorsal abdomen without dark pattern.

Variation. – Male cephalothorax ranges in length from 2.24 to 2.35 (n = 6; average 2.33). Female cephalothorax ranges in length from 2.04 to 2.14 (n = 2; average 2.09). Male total length ranges from 5.10 to 5.71 (n = 5; average 5.53). Female total length ranges from 4.69 to 5.41 (n = 2; average 5.05).

Figures

Fig. 1. Weintrauboa yunnan, new species, male: A, body, dorsal view; B, first metatarsus, lateral view; C, left palp, medial view; D, left palp, ventral view; E, left palp, lateral view; F, left chelicera, posterior view. Scale bars: A, B = 0.5 mm; C-F = 0.1 mm.

Fig. 2. Weintrauboa yunnan, new species, female. G. epigynum, lateral view; H. same, ventral view; I. same, dorsal view; J. epigynum (cleared), lateral view; K. same, ventral view; L. same, dorsal view. Scale bars: G-L = 0.1 mm.

Fig. 4. Weintrauboa yunnan, new species, SEM: Q, cymbial dorsoectal processes; R, left palpal tibia, retrolateral; S, embolic flap, detail; T, conductor, detail.