Wolongia bicruris, Wan, Jin-Long & Peng, Xian-Jin, 2013

Wan, Jin-Long & Peng, Xian-Jin, 2013, The spiders of the genus Wolongia Zhu, Kim & Song, 1997 from China (Araneae: Tetragnathidae), Zootaxa 3691 (1), pp. 87-134 : 89-90

Wolongia bicruris new species

( Figs 7–10 , 35 )

Type material: Holotype: male, CHINA, Yunnan, Fugong County, Yaping, 3 km up Shibali, 27.1775°N, 98.7550°E, 2527 m, 4 May 2004, Heng-mei Yan, Guang-xu Peng (HNU-20040504-2).

Paratypes: CHINA, Yunnan: 7 females, same data as holotype; 1 female, Lushui County, Luomumuo Township, 27.16784°N, 98.71782°E, 2682 m, 3 May 2004, Guang-xu Peng (HNU-20040503-2).

Etymology. The specific name comes from the Latin adjective “ bicruris ”, meaning “dichotomous”, and refers to the shape of the tip of cymbial ectobasal process.

Diagnosis. This species can be distinguished from other Wolongia species by the combination of the following characters: 1) femur I with several rows of short median macrosetae prolaterally and ventrally ( Figs 3 C, F; 6A–B); 2) cymbial base with a denticle retrolaterally ( Figs 3 D, 5B); 3) cymbial ectobasal process with one bifurcated tip ( Figs 3 B, D–E; 5A–C); 4) anterior side of epigynum with one pair of oblong depressions in ventral view ( Figs 4 C, 6D); 5) spermathecae strongly sclerotized ( Figs 4 B, D; 6E–F). Males of this species are similar to W. mutica n. sp. in having a similar denticle at the base of cymbium retrolaterally ( Figs 3 D, 5B, 19C, 21B) and similar location of the conductor and embolus on the genital bulb ( Figs 3 B, 5A, 19B, 21A), but can be distinguished from the latter by: 1) prolateral and ventral surface of femur I with several rows of short median macrosetae which is absent in W. mutica n. sp.; 2. cymbial ectobasal process with one bifurcated terminal versus robust terminal in W. mutica n. sp. ( Figs 19 B–D, 21A–C).

Description. Male (holotype): Total length 1.92. Cephalothorax 0.85 long, 0.75 wide. Abdomen 1.15 long, 1.10 wide. Carapace black-brown, with a yellow blotch centrally. AME 0.06, ALE 0.08, PME 0.08, PLE 0.08, AME-AME=AME-ALE (0.05), PME-PME>PME-PLE (0.09>0.05), LMOA 0.19, AWMOA 0.20, PWMOA 0.21. Clypeus 0.10. Chelicerae brown, with 5 retromarginal teeth ( Figs 1 A, 5D). Labium black-brown, width 0.20, length 0.10. Coxae black-brown. Legs brown. Femur I with several rows of short median macrosetae prolaterally and ventrally ( Figs 3 C, F; 6A–B). Leg measurements: I 5.65 (1.61, 1.85, 1.58, 0.61), II 4.22 (1.25, 1.40, 1.08, 0.49), III 2.40 (0.75, 0.74, 0.56, 0.35), IV 3.69 (1.05, 1.03, 0.85, 0.76). Abdomen oval, widest medially. Dorsum yellowish, with a black-brown longitudinal median stripe and six pairs of white diagonal stripe-shaped spots along the margins of the median stripe ( Fig. 3 A). Venter dark-brown, with one pair of white symmetrical longitudinal stripes. Cymbial base with one thin denticle retrolaterally ( Figs 3 D, 5B); cymbial ectobasal process with one bifurcated terminal ( Figs 3 B, D–E; 5A–C); tip of conductor approximately pointing to the position of 1:00 o’clock in the ventral view ( Figs 3 B, 5A); conductor and embolus almost covering the whole genital bulb in ventral view ( Figs 3 B, 5A).

Female (paratype): Total length 2.50. Cephalothorax 0.99 long, 0.81 wide. Abdomen 1.71 long, 1.44 wide. General appearance are different from that of male. Carapace brown, with black margins and a dark-brown cephalic region. AME 0.09, ALE 0.10, PME 0.10, PLE 0.09, AME-AME>AME-ALE (0.05>0.04), PME- PME=PME-PLE (0.06), LMOA 0.25, AWMOA 0.20, PWMOA 0.23. Clypeus 0.08. Chelicerae black brown, with 5 retromarginal teeth. Labium black, width 0.25, length 0.06. Coxae black. Legs black-brown. Leg measurements: I 4.62 (1.30, 1.53, 1.15, 0.64), II 3.52 (1.00, 1.12, 0.86, 0.54), III 2.32 (0.82, 0.65, 0.46, 0.39), IV 2.99 (0.93, 0.95, 0.71, 0.40). Abdomen oval, widest medially. Dorsum silvery-white, with a longitudinal median stripe and a pair of large black spots posteriorly; anterior half of the stripe black, posterior half brown with many small white spots ( Fig. 4 A). Venter black, with a pair of white longitudinal stripes. Epigynum with small atrium ( Figs 4 C, 6D); anterior side of epigynum with one pair of oblong depressions in ventral view ( Figs 4 C, 6D); spermathecae large and strongly sclerotized ( Figs 4 B, D; 6E–F); copulatory ducts short ( Figs 4 D, 6F).

Variation. Females, total length 2.36–2.50 (n=7).

Distribution. China (Yunnan).

Figures

FIGURE 1 Chelicerae, posterior view. A, Wolongia bicruris n. sp.; B, Wolongia bimacroseta n. sp.; C, Wolongia erromera n. sp.; D, Wolongia foliacea n. sp.; E, Wolongia guoi Zhu, Kim & Song, 1997; F, Wolongia mutica n. sp.; G, Wolongia odontodes Zhao, Yin & Peng, 2009; H, Wolongia renaria n. sp.; I, Wolongia tetramacroseta n. sp. Scale bars: 0.1 mm.

FIGURE 3. Wolongia bicruris n. sp., male holotype. A, habitus, dorsal view; B, palp, ventral view; C, femur I, prolateral view; D, palp, retrolateral view; E, palp, dorsal view; F, femur I, ventral view. Scale bars: A, 1.0 mm; B, D – E, 0.1 mm; C, F, 0.5 mm.

FIGURE 4. Wolongia bicruris n. sp., female paratype. A, habitus, dorsal view; B, genitalia, posterior view; C, epigynum, ventral view; D, vulva, dorsal view. Scale bars: A, 1 mm; B – D, 0.1 mm.

FIGURE 7. Wolongia bimacroseta n. sp., male holotype. A, habitus, dorsal view; B, palp, ventral view; C, palp, retrolateral view; D, palp, dorsal view. Scale bars: A, 1.0 mm; B – D, 0.1 mm.

FIGURE 8. Wolongia bimacroseta n. sp., female paratype. A, habitus, dorsal view; B, epigynum, ventral view; C, vulva, dorsal view; D, genitalia, prolateral view; E, epigynum, tangential view. Scale bars: A, 1.0 mm; B – E, 0.1 mm.

FIGURE 9. Wolongia bimacroseta n. sp., male holotype. A, palp, ventral view; B, palp, retrolateral view; C, palp, dorsal view; D, chelicerae, posterior view. Scale bars: 0.1 mm.

FIGURE 10. Wolongia bimacroseta n. sp., male holotype and female paratype. A, male metatarsus I, prolateral view; B epigynum, ventral view; C, vulva, dorsal view; D, epigynum, tangential view; E, genitalia, prolateral view. Scale bars: A, 0.5 mm; B – E, 1.0 mm.

FIGURE 19. Wolongia mutica n. sp., male holotype. A, habitus, dorsal view; B, palp, ventral view; C, palp, retrolateral view; D, palp, dorsal view; Scale bars: A, 1.0 mm; B – D, 0.1 mm.

FIGURE 35. Distribution records of Wolongia bicruris n. sp., W. bimacroseta n. sp., W. odontodes Zhao, Yin & Peng, 2009, W. renaria n. sp., W. erromera n. sp.