Sinartoria dui sp. nov.

Figs 1, 2, 3, 4 (杜氏华阿狼蛛)

Type material.

Holotype • ♂ (SWUC -T-LY-22-01), China, Guangxi, Laibin City, Jinxiu Co. 26 April 2023, W. Q. Zhao leg. (SWUC) . Paratypes: • 4 ♂ 3 ♀ (SWUC -T-LY-22-02 to 08), same data as holotype (SWUC) • 3 ♂ 3 ♀ (SWUC -T-LY-22-09 to 14), China, Guangxi, Jinxiu Co., Silverwood Forest park, 24°10'9"N, 110°14'38"E, elev. 1144 m, 26 April 2024, Q. L. Lu, C. C. Du and X. Y. Feng leg.

Etymology.

The specific name is derived from the family name of Dr Du Congcong of Guangxi Normal University, acknowledging his assistance in collecting specimens in Guangxi.

Diagnosis.

Sinartoria dui sp. nov. resembles S. damingshanensis Wang, Framenau & Zhang, 2021 in having a similar flamed-shaped terminal apophysis and three arms on the median apophysis in the male pedipalp and a large septum in the female epigyne (Figs 2 A – D, 3 B – F, 4 B; Wang et al. 2021: 573, figs 1 A – E, 2 D – I). It can be differentiated from the latter by the lack of teeth on the anterior arm of median apophysis (Figs 2 A, B, 3 F; vs. with several teeth), a sheet-like retrolateral arm of median apophysis (Figs 2 A, B, 3 B – E; vs. knife-like); the trapezoid-shaped septum of the epigyne (Figs 2 D, 4 B; vs. somewhat triangular) and the proximally rod-like fertilization ducts (Figs 2 E, 4 C; vs. fertilization ducts crescent-shaped).

Description.

Male (holotype, Figs 1 A, C, 3 A) total length 4.16. Carapace 2.26 long, 1.68 wide; opisthosoma 1.93 long, 1.28 wide. Eye sizes and interdistances: AME 0.08, ALE 0.07, PME 0.29, PLE 0.24; AME – AME 0.08, AME – ALE 0.11, PME – PME 0.23, PME – PLE 0.27. Clypeus height 0.07. Chelicerae yellow brown. Labium yellowish brown. Endites yellowish brown. Sternum black coarse long setae. Legs yellow brown, with brown pigmentation. Tibia with white setae, metatarsus and tarsus with notably long laterally protruding setae. Leg measurements: I 6.33 (1.78, 2.04, 1.64, 0.87); II 5.73 (1.58, 1.80, 1.51, 0.84); III 5.54 (1.47, 1.68, 1.57, 0.82); IV 8.09 (2.15, 2.48, 2.41, 1.05). Leg formula: 4123. Opisthosoma oval, dark brown dorsally, white spots on the front and end of the back.

Pedipalp (Figs 2 A – C, 3 B – F). Median apophysis with three arms (AA, RA and PA) protruded, AA triangular, RA sheet-shaped, and PA finger-shaped. Embolus long and slender, anterior part rests in a long groove of a large and complex terminal apophysis. Terminal apophysis with two arms, one of them sclerotized and groove-like, the other one membranous.

Female (paratype, Figs 1 B, D, E, 4 A) total length 5.21. Carapace 2.19 long, 1.65 wide; opisthosoma 2.80 long, 1.93 wide. Eye sizes and interdistances: AME 0.09, ALE 0.08, PME 0.31, PLE 0.23; AME – AME 0.08, AME – ALE 0.10, PME – PME 0.24, PME – PLE 0.29. Clypeus height 0.07. Legs yellow brown, with brown pigmentation. Leg measurements: I 6.81 (1.97, 2.44, 1.45, 0.95); II 6.12 (1.77, 2.05, 1.46, 0.84); III 6.06 (1.71, 1.88, 1.62, 0.85); IV 8.76 (2.24, 2.83, 2.54, 1.15). Leg formula: 4123. Opisthosoma yellow brown dorsally, with black pattern. Ventral yellow brown.

Epigyne (Figs 2 D, E, 4 B, C). Copulatory openings arc-shaped. Septum broad, trapezoid, narrow posteriorly. Spermathecal stalks slightly sclerotized, O-shaped. Spermathecal heads small with round end. Fertilization ducts small, with their length approximating the width of the spermathecal heads.

Habitat.

Beneath the humus stratum in deciduous broadleaf forests.

Distribution.

Known only from the type locality, Guangxi, China (Fig. 9).