Karschia (Karschia) dingye Fan & Zhang & Zhang 2024, sp. nov.
Creators: name: Fan, Wenlong
name: Zhang, Chao
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Solifugae
Karschiidae
Karschia
Karschia dingye

description: Karschia (Karschia) dingye sp. nov.
Figs 1, 3 E – H, 6 C, D, 8 E – H, 11 B, 12 B, 13 E – H, 16 C, D, 17 B, 18 B, 19 B, D, Tables 1, 2
Type material.
Holotype ♂ (MHBU - Sol-XZ 2023072701), China: Xizang, Shigatse Prefecture, Dingye County, Gyangkar Town, 28.3702 ° N, 87.7732 ° E, ca 4200 m elev., 27. VII. 2023, leg. Yanmeng Hou, Zhiyong Yang. Paratypes: 25 ♂♂ (MHBU - Sol-XZ 2023072702 –27), 15 ♀♀ (MHBU - Sol-XZ 2023072728 –43), with same data as holotype.
Etymology.
Noun in apposition taken from Dingye County where this species was collected.
Diagnosis.
Karschia dingye sp. nov. differs from K. nubigena by having fringed flagellum (Fig. 11 B), and pedipalpal metatarsus with papillae (Fig. 16 D), differs from K. tibetana by flagellar complex plumose (fcp) setae short (Fig. 11 B), from K. lhasa sp. nov. and K. zhui sp. nov. by cheliceral fixed finger mucron without dorsal crest (Figs 8 F, 13 F), and from K. shigatse sp. nov. and K. namling sp. nov. by flagellum without lateral apophysis (Fig. 11 B). The female genital operculum is easily recognizable across all known species, its bottom is slightly widened, giving it a trapezoidal appearance (Fig. 17 B).
Description.
Male. Holotype (MHBU - Sol-XZ 2023072701).
Measurements. Total body length 17.58, CL 4.96, CH 1.77, PL 2.11, PW 3.28, A / CP 7.86, CL / CH 2.80. Pedipalp 17.70 (3.68, 5.95, 4.07, 1.51), Leg I 14.65 (3.67, 3.66, 2.72, 1.48, 0.15), Leg II 11.13 (2.74, 2.73, 2.25, 1.03, 0.76), Leg III 14.58 (3.78, 3.77, 2.87, 1.04, 1.16), Leg IV 23.25 (5.45, 6.41, 4.42, 1.38, 1.23).
Coloration. In 95 % ethanol-preserved specimens (Fig. 3 E, F). The general background brown- yellow. Opisthosoma pale yellow, with black tergites and pale black sternites. Propeltidium tinged with pale brown. Ocular tubercle black. Mesopeltidium and metapeltidium with special black stripes. Chelicerae with manus predominantly yellowish, with some black areas, and a retrolateral view of chelicerae with three black longitudinal stripes (paler than K. tibetana). Pedipalps and legs pale yellow, legs III and legs IV tinged with pale brown on distal regions of femora and proximal parts of tibiae. Proximal regions of the pedipalpal femur, tibia, metatarsus, and tarsus tinged with brown. Malleoli white.
Propeltidium. Much wider than long with dense pubescence of thin, short, anteriorly directed setae. Anterior, posterior, and lateral edges with several long, curved spiniform setae, perpendicular to the surface of the propeltidium. Ocular tubercle with one short and four long middle distal spiniform setae which are arranged symmetrically on both sides of the short spiniform setae, one long middle spiniform setae, two short spiniform setae, and numerous shorter, thinner proximal setae (Fig. 6 C).
Chelicerae. Fixed finger primary teeth graded as FD <FP <FM. Profondal teeth series with four tiny teeth; retrofondal teeth series with six teeth. Dental formulation of fixed finger: FD - (3) - FM - (2) - FP - (6 RF) (4 PF). Fixed finger mucron moderately long, without dorsal crest. Movable finger MP tooth about the same size as MM. Dental formulation of movable finger: MM - (2) - MP, with two MSM and three MSP (Figs 8 E, 13 E). Flagellum, fringed without lateral apophysis, and basal peg expand. The flagellar complex includes two short fcp and two short, thick fcs (Figs 8 F, 11 B, 13 F). Retrolateral and dorsal surfaces of the manus with large, bifurcated tip setae and short simple tip bristle-like setae; retrolateral and dorsal surfaces of the fixed finger with simple tip setae of different sizes. Retrolateral setose area reaching the FSM teeth; prolateral surface with an array of setal types (Figs 8 E, F, 13 E, F).
Opisthosoma. The entire surface covered with almost adpressed setae and numerous long, curved, bifurcate setae. Sternite III with two posterior paramedian groups of ctenidia, being gradually larger to posterior. (Fig. 19 B); Sternite IV with 17 short peg-like ctenidia extending 1 / 4 the length of the succeeding sternite (Fig. 19 D).
Pedipalps. Entirely covered with short setae and long, thick setae. Tarsus with eleven short, sturdy ventral spines; metatarsus with nine ventral spines not arranged in pairs and with thin papillae (Fig. 16 C, D).
Legs. Entirely covered with long, thick setae and short setae. Leg I with no spines and two small claws. Tibias II, III, and IV with a pair of distal spines ventrally. Tibias II and III with a single dorsal spine; metatarsi II and III with a series of three dorsal spines, a pair of distal spines ventrally, and some paired short, thick, spine-shaped bristles over their entire ventral surface. Metatarsus IV also with these paired bristles over its entire ventral surface and two distal spines ventrally.
Female. Paratype (MHBU - Sol-XZ 2023072701).
Measurements. Total body length 25.64, CL 7.18, CH 2.75, PL 3.23, PW 4.25, A / CP 4.72, CL / CH 2.61, Palp 17.61 (4.16, 4.97, 3.70, 1.24), Leg I 9.84 (2.52, 3.60, 2.57, 1.18, 0.12), Leg II 10.21 (1.48, 2.49, 1.56, 0.83, 0.70), Leg III 12.80 (2.13, 2.87, 2.51, 0.94, 0.10), Leg IV 21.68 (4.06, 5.77, 3.96, 1.13, 1.19).
Coloration. In 95 % ethanol-preserved specimens (Fig. 3 G, H). Coloration as in the males.
Propeltidium. Much wider than long with a dense pubescence of thin, short, anteriorly directed setae. Anterior, posterior, and lateral edges with several long, curved spiniform setae that perpendicular to the surface of the propeltidium. Ocular tubercle with four middle distal spiniform setae, covered with some long setae and numerous shorter, thinner setae (Fig. 6 D).
Chelicerae. Dental formulation of fixed finger: FD - (3) - FM - (3) - FP - (7 RF) (4 PF). Dental formulation of movable finger: MM - (3) - MP, with three MST (front one tiny) and two MSP. Fondal teeth graded as II, IV, V, tiny I, tiny III, tiny VI, tiny VII retrolaterally; I, II, III, tiny IV prolaterally (Figs 8 G, H, 12 B, 13 G, H).
Opisthosoma. The entire surface covered with almost adpressed setae and numerous long, curved, bifurcate setae. The bottom of the genital operculum slightly widened, resembling a trapezoid (Fig. 17 B). Sternite IV with 19 short spine-like ctenidia extending from the edge of sternite IV (Fig. 18 B).
Pedipalps. Entirely covered with short setae and long, thick setae and without spines.
Legs. As in the males.
Variability.
Males. Total length 14.25–18.76. Body coloration pale yellow to tan. Chelicerae with manus yellowish to brown. The number of cheliceral fixed finger fondal teeth 9–11 (profondal teeth 3–4; retrofondal teeth 6–7). The number of ctenidia on sternite IV 16–18. Pedipalp tarsus with 10–12 spines, metatarsus with 8–10 spines. Females. Total length 20.13–27.68. Variability of body coloration as in males. The number of cheliceral fixed finger fondal teeth 9–12 (profondal teeth 3–5; retrofondal teeth 6–7). MST 2–3, MSP 1–2. The number of ctenidia on sternite IV 17–21. Additionally, we found that all specimen with 3 FSD.
Distribution and habitat.
China (Xizang). Habitat: meadow (Fig. 2 A, B).
Remark.
Based on the comparison of genetic distances, with a genetic distance of 0.30 % (Table 2) between male and female collected from same locations, we believe that they are same species.
description: Published as part of Fan, Wenlong, Zhang, Chao & Zhang, Feng, 2024, Review of the genus Karschia Walter, 1889 from Xizang, China (Solifugae, Karschiidae), pp. 155-190 in ZooKeys 1204 on pages 155-190, DOI: 10.3897/zookeys.1204.120164