Rhyssoleptoneta aosen, Zhu & Li, 2021

Zhu, Wenhui & Li, Shuqiang, 2021, Five new leptonetid spiders from China (Araneae: Leptonetidae), Zootaxa 4984 (1), pp. 281-299 : 296-297

Rhyssoleptoneta aosen spec. nov.

Figs 9–10 , 13A , 14

Type material. CHINA: Beijing: Holotype: male, Chaoyang District, Aosen (short name in Chinese for Olympic Forest Park ), 40°00’38.88”N, 116°23’32.16”E, ca. 40 m elevation, Tongyao Jiang leg. 8.11.2019 (IZCAS-Ar42312) . Paratypes: 1 male (IZCAS-Ar42313), 2 females (IZCAS-Ar42314–Ar42315), with same data as for holotype .

Etymology. The specific name refers to the type locality and is a noun in apposition.

Diagnosis. This species resembles R. latitarsa Tong & Li, 2007 (see Wang et al. 2012: 870, figs 1–10, Tong & Li, 2007: 35, figs 1–6), but males are distinguished by having a rectangular embolus (vs triangular in R. latitarsa ), a median apophysis without a distal branch, and by the presence of three tooth-shaped projections horizontally (rows of tooth-shaped projections vertical in R. latitarsa , Fig. 13B ) on the palpal bulb. Females are distinguished from R. latitarsa by lacking a long scape in the genital area.

Description. Male (holotype): Total length 1.90 ( Fig. 9A ). Carapace 1.05 long, 0.60 wide. Opisthosoma 0.85 long, 0.60 wide. Carapace yellow. Six eyes. Eye sizes: ALE 0.07, PLE 0.07, PME 0.03. Distance between eyes: ALE-PME 0.12, PLE-PLE 0.08, PLE-PME 0.07. Median groove needle-shaped, cervical grooves and radial furrows distinct. Clypeus 0.38 high. Chelicera light brown, with seven teeth on promargin of fang furrow and three small teeth on retromargin. Opisthosoma pale yellow, ovoid. Leg measurements: I 3.69 (0.95, 0.31, 1.24, 0.65, 0.54); II 2.90 (0.81, 0.24, 0.87, 0.54, 0.44); III 2.39 (0.76, 0.15, 0.56, 0.51, 0.41); IV 4.08 (1.01, 0.36, 1.33, 0.74, 0.64). Male palp ( Figs 9C–D ): femur without long spines; tibia with one long trichobothrium on the dorsal surface and without a special projection. Palpal tarsus wide, not branched distally, with a short projection on dorsal surface. Bulb complex, wrinkled on prolateral surface and with three 3 tooth-shaped projections on ventral surface (arrow in Figs 9B , 13A ). Embolus rectangular. Median apophysis long. Conductor triangular ( Fig. 9B ).

Female (paratype, IZCAS-Ar42314): Similar to male in colour and general features but larger. Total length 2.15 ( Figs 10A–B ). Carapace 0.90 long, 0.65 wide. Opisthosoma 1.25 long, 0.70 wide. Clypeus 0.43 high. Six eyes. Eye sizes: ALE 0.07, PLE 0.07, PME 0.03. Distance between eyes: ALE-PME 0.12, PLE-PLE 0.08, PLE-PME 0.07. Chelicera light brown, with seven teeth on promargin of fang furrow and four small teeth on retromargin. Leg measurements: I 4.08 (1.01, 0.40, 1.32, 0.86, 0.49); II 3.51 (0.99, 0.35, 0.94, 0.74, 0.49); III 2.88 (0.85, 0.21, 0.76, 0.62, 0.44); IV 4.36 (1.02, 0.41, 1.46, 0.93, 0.54). Genital area ( Fig. 10B ) without a scape on the posterior edge. Internal genitalia ( Fig. 10C ) with a pair of coiled spermathecae and sperm ducts.

Distribution. Beijing, China ( Fig. 14 ).

Figures

FIGURES 9A–D. Rhyssoleptoneta aosen spec. nov., holotype male. A Habitus, dorsal. B Palpal bulb, ventral, arrow points at three teeth shaped projections. C–D Left palp (C prolateral, D retrolateral). C—conductor, E—embolus, MA—median apophysis.

FIGURES 10A–C. Rhyssoleptoneta aosen spec. nov., paratype female A–B Habitus (A dorsal, B ventral). C Internal genitalia, dorsal. SP—spermathecae. SS— stalk of spermathecae.

FIGURES 13A–B. Rhyssoleptoneta spp., male palpal bulb, ventral (arrow points at same structures as in photos of each species) (A R. aosen spec. nov., B R. latitarsa). C—conductor, E—embolus, MA—median apophysis

FIGURE 14. Distribution records of five new species and their relatives of leptonetid spiders from China. 1 Leptonetela martensi spec. nov., 2 L. dao, 3 L. taixu spec. nov., 4 L. chenjia, 5 L. xianwu spec. nov., 6 L. xianren, 7 L. xinglong spec. nov., 8 L. liangfeng, 9 Rhyssoleptoneta aosen spec. nov., 10 R. latitarsa.