Hypsosinga ryani, Mi & Li & Pham, 2023

Mi, Xiaoqi, Li, Shuqiang & Pham, Dinh-Sac, 2023, On five new species of the genera Araneus and Hypsosinga (Araneae, Araneidae) from Vietnam, ZooKeys 1161, pp. 69-87 : 69

Hypsosinga ryani sp. nov.

Figs 6 , 7 , 10A-D

Type material.

Holotype ♂ (IZCAS-Ar44148), Vietnam: Ha Tay Province, Ba Vi District, Tan Linh Village, 23.VII.2000, Dinh-Sac Pham leg. Paratype: 1 ♀ (IZCAS-Ar44149), Cao Bang Province, Sac Ha Village, 17.VII.2000, Dinh-Sac Pham leg.

Etymology.

The species name is a boy’s name from Vietnam; noun (name) in genitive case.

Diagnosis.

The new species resembles H. alboria Yin, Wang, Xie & Peng, 1990 in appearance, but can be distinguished from the latter in having: 1) the epigyne lacking a septum (Fig. 6A ) vs with a septum ( Yin et al. 1990: fig. 182); 2) the spermathecae spaced apart by about one radius (Fig. 6B, C ) vs about half of the radius ( Yin et al. 1990: fig. 183); 3) the ventral surface of the epigyne smooth (Fig. 6A ) vs concave ( Yin et al. 1990: fig. 182); 4) the male palpal tibia palmate (Fig. 7A-C ) vs not palmate; 5) the median apophysis stout (Fig. 7A, C, D ) vs with a long, slender tip ( Yin et al. 1990: figs 184-186); 6) the embolus short and straight (Fig. 7A, C, D ) vs extremely long and curved ( Yin et al. 1990: fig. 184); and 7) the tegular extension lacking (Fig. 7B-D ) vs present ( Yin et al. 1990: fig. 185).

Description.

Male (holotype, Figs 6F, G , 7 , 10A-D ). Total length 2.50. Carapace 1.15 long, 0.95 wide. Abdomen 1.40 long, 0.85 wide. Clypeus 0.20 high. Eye sizes and interdistances: AME 0.06, ALE 0.05, PME 0.10, PLE 0.06, AME-AME 0.08, AME-ALE 0.13, PME-PME 0.08, PME-PLE 0.15, MOA length 0.23, anterior width 0.20, posterior width 0.25. Leg measurements: I 3.80 (1.15, 1.30, 0.85, 0.50), II 3.45 (1.05, 1.20, 0.75, 0.45), III 2.40 (0.80, 0.75, 0.50, 0.35), IV 3.50 (1.15, 1.15, 0.75, 0.45). Carapace reddish brown, with pale stripe before fovea; cervical groove inconspicuous. Chelicerae yellowish brown; four promarginal and two retromarginal teeth. Endites and labium yellowish brown at base, paler distally. Sternum dark brown. Legs yellow to yellowish brown; leg I and II with brown annuli; tibia I with seven macrosetae; tibia II with three macrosetae; tibia III with seven macrosetae; tibia IV with two macrosetae. Abdomen ~1.6 × longer than wide, with a pair of lateral humps posteriorly; dorsum reddish brown, with indistinct longitudinal pale patch and three pairs of pale spots; venter yellow to yellowish brown, with darker patches. Spinnerets yellowish brown.

Palp (Fig. 7 ): with a single patellar bristle; tibia palmate, with bifurcated protuberance and four denticles (see white arrows in Fig. 7A, B, E ); cymbium ~1.25 × wider than long and covers most part of bulb in prolateral view, with dorsal protuberance at base (see black arrows in Fig. 7A, B ); median apophysis elliptical at base, with two processes in apical view; tegulum smoothly rounded and lacking tegular extension in retrolateral view; embolus tapered, triangular in prolateral view, slightly curved at tip in ventral view; conductor broad at base, tongue-shaped distally in apical view; terminal apophysis membranous, narrow lamellar, about subequal in length to embolus.

Female (paratype IZCAS-Ar44149, Fig. 6A-E ). Total length 2.55. Carapace 1.05 long, 0.80 wide. Abdomen 1.65 long, 1.35 wide. Clypeus 0.10 high. Eye sizes and interdistances: AME 0.06, ALE 0.05, PME 0.10, PLE 0.08, AME-AME 0.08, AME-ALE 0.13, PME-PME 0.08, PME-PLE 0.13, MOA length 0.20, anterior width 0.18, posterior width 0.23. Leg measurements: I 2.95 (0.90, 1.05, 0.60, 0.40), II 2.65 (0.85, 0.85, 0.60, 0.35), III 1.80 (0.60, 0.60, 0.35, 0.25), IV 2.90 (0.95, 1.00, 0.60, 0.35). Habitus similar to that of male but darker, and pale patches on dorsum of abdomen more distinct.

Epigyne (Fig. 6A-C ): ~2.3 × wider than long in ventral view, lacking scape; copulatory openings rounded, situated at the lateral side of ventral surface; copulatory ducts about of equal length to spermatheca diameter; spermathecae globular, about one radius apart.

Distribution.

Vietnam (Ha Tay and Cao Bang provinces).

Figures

Figure 6. Hypsosinga ryani sp. nov. A-E female paratype IZCAS-Ar 44149 F, G male holotype A epigyne, ventral view B vulva, posterior view C ibid., dorsal view D habitus, dorsal view E ibid., ventral view F ibid., dorsal view G ibid., lateral view. Scale bars: 0.1 mm (A-C); 1 mm (D-G).

Figure 7. Hypsosinga ryani sp. nov., male holotype A left palp, prolateral view B ibid., retrolateral view C ibid., ventral view D ibid., apical view E tibia of left palp, dorsal view. Scale bars: 0.1 mm.

Figure 10. Legs of the new species, holotypes, prolateral view A-D Hypsosinga ryani sp. nov. E-F Hypsosinga zioni sp. nov. A, E legs I B, F legs II C, G legs III D, H legs IV. Scale bars: 1 mm.