Spinirta sishuishan Liu, 2022

Spinirta sishuishan Liu sp. nov.

(汜水山刺突蛛) Figs 6 View Figure 6 , 7 View Figure 7 , 8 View Figure 8

Material examined.

Holotype: 1 ♂, China: Jiangxi Province, Ganzhou City, Chongyi County, Sishui Mountain , near parking lot, 25°27'11.73"N, 113°55'30.04"E, 965 m, 2.X.2020, K. Liu et al. leg. (Cor-02). GoogleMaps

Etymology.

The specific name, derived from the type locality, is a noun in apposition.

Diagnosis.

The male of this new species can be distinguished from S. sanxiandian sp. nov. by the shield retrolateral tibial apophysis ( RTA) (vs. ear-shaped), the anterior part of the tegulum lacking lateral apophysis (vs. present in S. sanxiandian sp. nov.) and the relatively blunt embolic apophysis ( EA) in retrolateral view (vs. sharp in S. sanxiandian sp. nov.) (cf. Fig. 7 View Figure 7 vs. Fig. 2 View Figure 2 ).

Description.

Male. Habitus as in Fig. 6A, B View Figure 6 . Total length 10.45. Carapace: 5.6 long, 4.21 wide. Carapace covered with abundant short hairs. Eye sizes and interdistances (Fig. 6C View Figure 6 ): AME 0.35, ALE 0.24, PME 0.3, PLE 0.29, AME-AME 0.2, AME-ALE 0.08, PME-PME 0.27, PME-PLE 0.23, AME-PME 0.2, AME-PLE 0.41, ALE-ALE 0.96, PLE-PLE 1.43, ALE-PLE 0.07. MOA 0.76 long, front width 0.8, back width 0.85. Chelicera (Fig. 6D View Figure 6 ) with three promarginal and six retromarginal teeth. Abdomen: 4.79 long, 3.14 wide. Leg measurements: I 15.93 (4.62, 1.44, 4.18, 3.64, 2.05); II 15.78 (4.41, 1.9, 3.75, 3.73, 1.99); III 13.51 (3.75, 1.58, 3.15, 3.29, 1.74); IV 18.24 (4.84, 1.83, 4.29, 5.37, 1.91); spination (Fig. 6E, F View Figure 6 ): I Fe: d3, p1; Ti: v7; Mt: v4; II Fe: d1, p1; Ti: r3, v7; Mt: r2, v4; III Fe: d3, r1; Ti: p4, r2, v4; Mt: p4, r1, v5; IV: Fe: d3, r1; Ti: p3, r2, v2; Mt: p2, r2, v2.

Colouration (Fig. 6 View Figure 6 ). Carapace and chelicerae dark brown. Endites and labium red-brown to dark brown. Sternum dark brown. Legs: femora I-IV dark brown, tibia and metatarus IV red to dark brown; patellae I-IV, tibiae and metatarsi I-III and tarsi I-IV red. Abdomen dark brown, medially with a pale serrulate marking. Spinnerets yellow-brown.

Palp as in Fig. 7 View Figure 7 . Tibia with distinct retrolateral groove, ventral apophysis ( VTA) thumb-like in ventral view. Retrolateral tibial apophysis ( RTA) shield in retrolateral view, nearly as long as tibial length, ventral surface with four lines of short cone-shaped spines ( CS). Prolateral tibial apophysis ( PTA) thick horn-like, strongly sclerotised, nearly as long as 1/3 of tibia. Tegulum with strongly sclerotized apex. Subtegulum ( St) with many wrinkles on posterolateral tegulum. Sperm duct ( SD) S-shaped in posterior part. Embolus ( E) spine-like, with thick base, forming a C-shape with short blunt embolic apophysis ( EA), nearly 4 × longer than embolic apophysis.

Female. Unknown.

Distribution.

Known only from the type locality, Jiangxi Province, China (Fig. 8 View Figure 8 ).