Eresus lishizheni Lin, Marusik & Li, 2021

Lin, Yejie, Marusik, Yuri M., Gao, Caixia, Xu, Hao, Zhang, Xiaoqing, Wang, Ziyi, Zhu, Wenhui & Li, Shuqiang, 2021, Twenty-three new spider species (Arachnida: Araneae) from Asia, Zoological Systematics 46 (2), pp. 91-152 : 109-112

Eresus lishizheni Lin, Marusik & Li , sp. nov. ( Figs 18A–E , 19A–C )

Diagnosis. Eresus lishizheni Lin, Marusik & Li , sp. nov. is similar to the Iranian species E. adaleari Zamani & Szűts, 2020 by having a black carapace covered with short black and white setae that is almost as wide at the pars cephalica as it is at the pars thoracica, and a relatively steep but straight slope of the ocular area ( Figs 18A–B ; Zamani, Altin & Szűts, 2020, figs 26–27). This species can be distinguished from E. adaleari by a uniformly black abdomen ( Fig. 18A ) (vs. with four brown spots). The palp are similar to those of E. adaleari by the shape of the C, the strongly curved terminal tooth, and the conspicuously deep lamellar groove but can be distinguished by the unique shape of the C ( Zamani, Altin & Szűts, 2020, figs 3–14), the lamella almost reaching the top of the C ( Fig. 18A ), and the narrow lamellar groove (vs. the lamella reaching the middle of the C, and the wide lamellar groove).

Description. Male (Holotype, IZCAS-Ar42414, Figs 18A–E , 19A–C ). Habitus as in Figs 19A–C . Total length: 8.91, carapace 4.94 long, 3.72 wide, 2.60 high. Opisthosoma 5.00 long, 3.84 wide. Carapace nearly equally wide at pars cephalica (3.92) and pars thoracica (3.72). Carapace red-brown with white setae; pars cephalica elevated. Eye sizes and interdistances: AME 0.20, ALE 0.13, PME 0.13, PLE 0.14, AME–AME 0.20, AME–ALE 1.13, PME–PME 0.20, PME–PLE 2.02, AME– PME 0.11, ALE–PLE 1.88. Pars cephalica with a pointed posterior margin dorsally, almost as long as wide (1.72 long, 2.00 wide). Chelicerae covered with white and black setae. Legs with a white ring of setae at joints. Patella, tibia, and metatarsus III–IV with inconspicuous white stripes of setae. Legs with ventral macrosetae on tarsus, metatarsus, and tibia I–IV. Leg measurements: Leg I 9.49 (2.88 + 3.13 + 2.04 + 9.49); leg II 7.50 (2.14 + 2.63 + 1.58 + 1.15); leg III 5.95 (1.78 + 1.96 + 1.24 + 0.97); leg IV 9.08 (2.63 + 3.40 + 1.90 + 1.15). Abdomen dark brown, covered with white setae, without any pattern, sigilla inconspicuous.

Palp ( Figs 18A–E ). T round. C length is greater than width, with slight “shoulder”, and curved terminal tooth; the length of terminal tooth almost equal to the length of the lamella; groove deep and narrow; lamella triangular.

Female. Unknown.

Material examined. Holotype ♂, China: Xinjiang Uygur Autonomous Region, Ili Kazak Autonomous Prefecture , Yining , Huocheng County (44.0695°N, 80.8774°E), 4 April 2019, leg. Zitan Zhao (IZCAS-Ar42414) . Paratype. 1♂ (IZCAS- Ar42415), same data as holotype .

Distribution. Known only from the type locality.

Etymology. The species is named after Mr. Li Shizhen (1518–1593) who described the first spider species in 1578 in a highly influential materia medica, the Ben Cao Gang Mu (Compendium of Materia Medica), and it is a noun (name) in genitive case.

Figures

Figure 18. Eresus lishizheni Lin, Marusik & Li, sp. nov., holotype male, palp.A. Conductor, right palp, retrolateral view; B. Conductor, left palp, prolateral view; C. Palp, left palp, prolateral view; D. Palp, left, palp, ventral view; E. Palp, left palp, retrolateral view. Scale bars: A–B=0.1mm; C–E=0.3mm.

Figure 19. Eresus lishizheni Lin, Marusik & Li, sp. nov., holotype male, habitus. A. Dorsal view; B. Ventral view; C. Lateral view. Scale bars: A–B=2.0mm; C=1.0mm.