Spinirta quadrata Jin & Zhang, 2020

Figs 1E–F, 8–9, 14

Spinirta quadrata Jin & Zhang, 2020: 322, figs 3f, 18a–i, 19a–d (♂).

Chinese name

方刺Żü

Differential diagnosis

Female of Spinirta quadrata Jin & Zhang, 2020 can be distinguished from all other congeners by the atrium outline oval, wider than long, and accessory glands absent (Figs 8, 9C–D).

Material examined

CHINA • 1 ♂; Chongqing City, Wuxi County, Shuangyang Township, Yintiaoling Natural Reserve, Hongqi Administrative Station; 31°31′00″ N, 109°49′42″ E; alt. 1263 m; 16 Aug. 2022; T. Y. Ren leg.; SWUC-COSQ-01 • 2 ♂♂, 1 ♀; Yintiaoling Natural Reserve, Hongqi Administrative Station; 10–11 Aug. 2022; Q.L. Lu leg.; SWUC-COSQ-02 to 04 • 1 ♂, 1 ♀; Wuxi County, Shuangyang Township, Yintiaoling Natural Reserve, Laolingou; 31°32′49″ N, 109°51′54″ E; alt. 1286.10 m; 11 Aug. 2022; T.Y. Ren leg.; SWUC-COSQ-05, SWUC-COSQ-06 • 1 ♂; Yintiaoling Natural Reserve, Linkouzi; 31°28′28″ N, 109°52′40″ E; alt. 1289 m; 14 Aug. 2022; Q.L. Lu leg.; SWUC-COSQ-07 • 1 ♀; Yintiaoling Natural Reserve, Linkouz; 31°28′27″ N, 109°52′52″ E; alt. 1281 m; 16 Aug. 2022; B. Luo leg.; SWUC-COSQ-08 .

Description

Male (SWUC-COSQ-01, Figs 1E, 9A) MEASUREMENTS. Total length 11.15. Prosoma 5.80 long, 4.57 wide; opisthosoma 5.18 long, 3.65 wide.

Eye sizes and interdistances: AME 0.34, ALE 0.30, PME 0.32, PLE 0.33; AME–AME 0.18, AME– ALE 0.13, PME–PME 0.33, PME–PLE 0.36, ALE–PLE 0.15. MOA 0.90 long, anterior width 0.87, posterior width 0.95. Clypeus height 0.43.

CHELICERAE. With three promarginal and five retromarginal teeth.

LEG MEASUREMENTS. I = 16.23 (4.55, 5.72, 3.72, 2.24); II = 14.99 (4.21, 5.12, 3.50, 2.16); III = 12.79 (3.85, 4.30, 3.14, 1.50); IV = 17.72 (4.71, 5.91, 5.01, 2.09). Leg formula: 4123.

PALP (Fig. 9E–G). For description see Jin & Zhang (2020).

Female (SWUC-COSQ-04, Figs 1F, 9B)

MEASUREMENTS. Total length 13.65. Prosoma 5.48 long, 4.37 wide; opisthosoma 7.49 long, 5.59 wide. Eye sizes and interdistances: AME 0.30, ALE 0.28, PME 0.30, PLE, 0.29; AME–AME 0.20, AME– ALE 0.14, PME–PME 0.33, PME–PLE 0.35, ALE–PLE 0.16. MOA 0.83 long, anterior width 0.82, posterior width 0.90. Clypeus height 0.31.

LEG MEASUREMENTS. I = 14.92 (4.31, 5.38, 3.21, 2.02); II = 14.17 (4.22, 4.90, 3.16, 1.89); III = 12.04 (3.57, 4.10, 2.79, 1.58); IV = 17.01 (4.70, 5.74, 4.71, 1.86). Leg formula: 4123.

EPIGYNE (Figs 8A, 9C). Atrium oval, wider than long, copulatory openings located posteriorly deep inside the atrium.

VULVA (Figs 8B, 9D). Copulatory ducts L-shaped, anterior margin partly membranous; accessory glands absent; spermathecae round; fertilization duct large, extending mesally.

Distribution

China (Chongqing, Hubei) (Fig. 14).