Leptoneta foliiformis, Tong & Li, 2008

Tong, Yanfeng & Li, Shuqiang, 2008, Six new cave-dwelling species of Leptoneta (Arachnida, Araneae, Leptonetidae) from Beijing and adjacent regions, China, Zoosystema 30 (2), pp. 371-386 : 378-380

Leptoneta foliiformis n. sp.

( Fig. 3 )

TYPE MATERIAL. — Holotype: China, Beijing City, Fangshan District, Shangfangshan Mountain (39°39’N, 115°48’E), Yunshui Cave , 22.I.2005, leg. H. Chen & X. Han, ♂ ( MNHN).

Paratypes: same data as holotype, 3 ♂♂, 4 ♀♀ ( IZCAS) ; 2 ♂♂, 2 ♀♀ ( MNHN). — Same locality as holotype, 1.IX.2005, Y.Tong & Q. Wang, 2 ♂♂, 1 ♀ ( IZCAS). — Hebei Province, Mancheng County, Caojiayu Village, Caoxian Cave (39°03’N, 115°10’E), 9.VI.2005, leg. Y. Tong & Q. Wang, 7 ♂♂, 12 ♀♀ ( IZCAS). — Hebei Province, Mancheng County , Caojiayu Village , Caoxian Cave (39°03’N, 115°10’E), 9.VI.2005, leg. Y. Tong & Q. Wang, 2 ♂♂, 2 ♀♀ ( MNHN) .

ETYMOLOGY. — The specific name comes from Latin, foli, leaf and form, shape, in reference to the leaf-shaped median apophysis of male palpal bulb.

DIAGNOSIS. — The new species is similar in female genitalia to L. tunxiensis Song & Xu, 1985 , but can be distinguished by the presence of seven promarginal teeth on fang furrow, the absence of three short stout spines on retrolateral surface of male palpal patella, and the different shape of laminae of the palpal bulb.

DESCRIPTION

Male (n = 17)

Body length 1.42-1.99 (average: 1.79). Carapace 0.68-0.75 (average: 0.72) long, 0.66-0.71 (average: 0.69) wide; abdomen 0.84-1.15 (average: 1.03) long, 0.58-0.86 (average: 0.73) wide. Carapace yellow, with a small seta presented before middle of ALE, a pair of setae at antero-lateral area of PME, and with a long seta at the rear of median groove. Median groove dark brown, needle-shaped.Cervical grooves and radial furrows light brown. Clypeus 0.13-0.19 (average: 0.16) high. Six eyes. Eye sizes: ALE 0.05, PLE 0.04, PME 0.04. Distance between eyes: ALE-PME 0.08, PLE-PLE 0.06, PLE-PME 0.03. AER 0.11, PER 0.14. Major axes of PLE convergent behind. PME continuous, axes parallel. Chelicera ( Fig. 3D ) light brown, with seven teeth on promargin of fang furrow and four small teeth on retromargin. Endites and labium light brown. Sternum ( Fig.3C ) and legs yellow. Measurements of palp and legs: palp 2.01 (0.76, 0.33, 0.36, –, 0.56); I 4.98 (1.45, 0.25, 1.56, 1.13, 0.59); II 4.13 (1.20, 0.26, 1.14, 0.92, 0.61); III 3.48 (0.97, 0.24, 0.92, 0.83, 0.52); IV 4.70 (1.35, 0.24, 1.42, 1.08, 0.61). Leg formula:I-IV-II-III. Femur I with some relatively thicker setae on middle part of anterior surface.Tibia I with row of finely hairs on distal half part of ventral surface ( Fig. 3E ). Metatarsus II and III ( Fig. 4H, I ) as L. setulifera n. sp., with a cluster of hairs on basal part of ventral surface, respectively.Abdomen haired, pale gray, and oval in shape, no distinct pattern on the dorsum. Palpal femur with some long spines ventrally. Palpal tibia with three long trichobothria on the dorsal surface and without special projection ( Fig. 3A, B ). Cymbium distally branched.

Female (n = 21)

Similar to male in coloration and general features, but legs shorter. Body length 1.65-1.95 (average: 1.76). Carapace 0.62-0.65 (average: 0.64) long, 0.61-0.63 (average: 0.62) wide; abdomen 1.00-1.37 (average: 1.19) long, 0.82-0.95 (average: 0.88) wide. Clypeus 0.13-0.15 (average: 0.14) high. Eye sizes: ALE 0.06, PLE 0.05, PME 0.04. Distance between eyes: ALE-PME 0.07, PLE-PLE 0.06, PLE-PME 0.03. AER 0.10, PER 0.13. Measurements of palp and legs: palp 1.27 (0.42, 0.15, 0.30, –, 0.40); I 4.53 (1.28, 0.23, 1.32, 1.02, 0.68); II 3.58 (1.02, 0.23, 1.00, 0.79, 0.54); III 3.06 (0.86, 0.22, 0.77, 0.72, 0.49); IV 4.24 (1.20, 0.22, 1.26, 0.97, 0.59). Leg I without special hairs as in male. Internal genitalia with a pair of spermatheca and sperm duct, atrium visible ( Fig. 3F, G ).

Figures

FIG. 3. — Leptoneta foliiformis n. sp.: A, male left palp in prolateral view; B, male left palp in retrolateral view; C, female sternum in ventral view; D, male chelicera in ventral view; E, male left leg I in anterior view; F, female genitalia in dorsal view; G, female genitalia in ventral view. Abbreviations: C, E, M, conductor, embolus and median apophysis of male palpal organ respectively. Scale bars: A-D, F, G, 0.1 mm; E, 0.3 mm.

FIG. 4. — Leptoneta setulifera n. sp.: A, male left palp in prolateral view; B, male left palp in retrolateral view;C, male left palpal bulb in retrolateral view; D, tibia I of male left leg in anterior view; E, male sternum in ventral view; F, male chelicera in ventral view; G, female genitalia in ventral view; H, proximally of metatarsus of male leg III, ventral view; I, proximally of metatarsus of male leg III, lateral view; J, female genitalia in dorsal view.Abbreviations:C, E, M, conductor,embolus and median apophysis of male palpal organ respectively. Scale bars: A, B, 0.2 mm; C, E-J, 0.1 mm; D, 0.3 mm.