Orientattus chushu K. Liu 2025, sp. nov.

Orientattus chushu K. Liu sp. nov. Figs 6, 7, 12 B, C Common name: 楚舒东蛛 Type material. Holotype ♂, China • Jiangxi Province: Ji’an County, Jinggangshan County Level City, Ciping Town, Zhufeng Scenic Spot, 26°32'16.8"N, 114°8'38.4"E, 846 m a. s. l., 1 August 2014, Feng-bo Zhang, Yong-hong Xiao, Chu-shu Xie, Huo-kai Wang, Jiao-rong Liu, Ze-yuan Meng and Ke-ke Liu leg. (Sal- 049, ASM-JGSU). Paratypes: • 1 ♀, Xiaojing Village, Longtan Scenic Spot, 26°35'24"N, 114°8'9.6"E, 930 m a. s. l., 2 August 2014, other data as same as holotype (Sal- 049, ASM-JGSU). Diagnosis. Male is similar to that of Orientattus aurantius (Kanesharatnam & Benjamin, 2018) (cf. Figs 6 C-F, 12 B, C and Caleb J. T. D. 2020: 2, figs 1–5) in having the rounded tegulum, same posterior lobe in ventral view and bifurcated retrolateral tibial apophysis, but can be easily distinguished from it by the longer curved embolus with a thin tip (vs the short embolus with a thick tip) and three forked RTA (vs two). The females of this species resemble O. bowu Lin, Wang & Ruan, 2024 (cf. Fig. 7 C, D and Lin et al. 2024: 28, fig. 4 A, B) in having a relatively small copulatory opening and a pair of pockets on the posterior margin of the epigynal plate, but can be separated by the closely spaced pockets (vs widely) and the oval-shaped spermathecae (vs reniform). Description. Male (holotype). Habitus (Fig. 6 A, B). Total length 5.04. Carapace (Fig. 6 A), anterior eyes area and posterior margin black, subposterior part red, length 2.36, width 1.88, with dense, short, white setae. Eyes (Fig. 6 A) diameters and interdistances: AME 0.51, ALE 0.25, PME 0.18, PLE 0.28; AME – AME 0.13, ALE - AME 0.12, PME – PME 1.5, PLE - PME 0.16, AME - PME 0.76, AME - PLE 1.05, ALE - ALE 1.27, PLE - PLE 1.36, ALE - PLE 0.81. MOA 1.17 long, front width 1.15, back width 1.67. Chelicerae (Fig. 6 B) black, straight, robust, with two retromarginal and one promarginal teeth. Endites brown, nearly as long as wide. Labium brown, wider than long. Sternum yellow to brown, longer than wide, with densely long setae. Legs yellow to black brown (Fig. 6 A, B), with brown annulations; measurements: I 4.37 (1.23, 0.77, 1.14, 0.65, 0.58); II 4.16 (1.32, 0.69, 0.97, 0.59, 0.59); III 4.34 (1.34, 0.8, 0.85, 0.68, 0.67); IV 4.88 (1.5, 0.62, 1.06, 0.98, 0.72); spination: I Fe: d 1-0 - 0; Pa pr 1-1 - 1; Ti pv 1-1 - 1, rv 1-1 - 1; Met pv 1-0 - 1, rv 1-0 - 1, v 1-0 - 1; II Fe pr 1-1 - 1; Pa pr 1-1 - 2; Ti pv 0-1 - 0, pr 0-1 - 0; III Fe d 1-1 - 1, pr 0-0 - 1, rt 0-0 - 1; Pa pr 0-1 - 0; Ti pv 0-1 - 1, rv 0-0 - 1, pr 0-1 - 1; Met pr 1-0 - 0, rt 1-0 - 1; IV Fe pr 1-1 - 1, rt 0-0 - 1; Pa pr 0-0 - 1; Ti pv 1-0 - 1, v 0-0 - 1, pr 1-0 - 0, rt 1-0 - 0; Met pr 1-1 - 0, rt 1-1 - 1. Abdomen (Fig. 6 A, B) elongate, oval, yellow to black-brown, with five yellow stripes, 2.61 long, 1.89 wide; venter yellow to brown, with U-shaped and straight serrated stripes. Palp (Figs 6 C-F, 12 B, C). Retrolateral tibial apophysis thumb-like in ventral view, apex directed ventrally, with three dentate processes in retrolateral view. Posterior lobe of tegulum elongated, nearly extending to the medial part of tibia. Sperm duct curved, arising from 12 o’clock. Embolus hook-shaped, arising from 10 o’clock, with a spine-like tip, directed retrolaterally. Female (paratype). As in male, except as noted. Habitus (Fig. 7 A, B). Total length 7.23. Carapace (Fig. 7 A) length 3.02, width 2.69. Eyes (Fig. 7 A) diameters and interdistances: AME 0.58, ALE 0.37, PME 0.12, PLE 0.33; AME – AME 0.29, ALE - AME 0.27, PME – PME 1.87, PLE - PME 0.29, AME - PME 0.71, AME - PLE 1.04, ALE - ALE 1.72, PLE - PLE 1.98, ALE - PLE 0.72. MOA 1.04 long, front width 1.35, back width 2.12. Chelicerae (Fig. 7 B) black, straight, robust, with two retromarginal and one promarginal teeth. Legs measurements: I-II missing; III 6.46 (2.02, 0.78, 1.52, 1.21, 0.93); IV 5.78 (2.05, 0.64, 1.32, 0.93, 0.84); spination (Fig. 7 A, B): III Fe d 1-0 - 1, pr 0-0 - 1, rt 0-0 - 1; Pa rv 0-1 - 0; Ti pr 1-0 - 1, rt 1-0 - 1; Met pv 1-0 - 1, rv 1-0 - 1, pr 1-0 - 1, rt 1-0 - 1; IV d 1-0 - 1, pr 0-0 - 1, rt 0-0 - 1; Ti pv 1-0 - 1, rv 1-0 - 1, pr 1-0 - 1, rt 1-0 - 1; Met missing. Abdomen (Fig. 7 A, B) with seven yellow stripes from anterior to front of anus, 4.38 long, 3.27 wide. Epigyne (Fig. 7 C, D). Copulatory openings located at antero-lateral part of epigyne, longitudinal, directed anteriorly. Copulatory ducts very short, curved. Spermathecae oval, anterior part closer than posterior. Fertilization ducts anteriorly located, directed laterally. Distribution. Known only from the Jiangxi Province locality (Fig. 13). Etymology. The specific name is a patronym for Miss Chushu Xie, who collected the specimens from Jingggang Mountain; noun in apposition. Remark. Due to the bifurcated RTA and the well-developed PL of this new species that closely resemble those of the type species O. aurantius, we place it in the genus Orientattus.