Eresus yukuni Lin & Li, 2022

Lin, Yejie, Li, Shuqiang, Zhao, Xin, Chen, Zhanqi & Chen, Haifeng, 2022, Two new Eresus species (Araneae, Eresidae) from Xinjiang, China, Biodiversity Data Journal 10, pp. 94853-94853 : 94853

Eresus yukuni Lin & Li sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Kun Yu; individualID: IZCAS-Ar43546; occurrenceID: F2E880E4-6CA6-5E5A-929E-63D1B3CE4703; Taxon: taxonID: urn:lsid:zoobank.org:act:95651052-1B7C-47FE-8E6E-1D6D20E51B0A ; scientificName: Eresus yukuni Lin & Li, sp. n.; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Eresidae; genus: Eresus; Location: country: China; stateProvince: Xinjiang Uygur Autonomous Region; municipality: Urumqi City; locality: Saybag District , near Shihuoshan Tunnel ; decimalLatitude: 43.7947; decimalLongitude: 87.4783; Identification: identifiedBy: Kun Yu; Event: year: 2019; month: 6; day: 24

Description

Male (Holotype, IZCAS-Ar43546): Habitus as in Figs. 2C and D. Total length: 6.48, carapace 3.35 long, 2.44 wide, 1.76 high. Abdomen 3.20 long, 2.88 wide. Carapace black with white setae; pars cephalica elevated. Eye sizes and interdistances: AME 0.09, ALE 0.13, PME 0.18, PLE 0.08, AME-AME 0.12, AME-ALE 0.78, PME-PME 0.19, PME-PLE 1.03, AME-PME 0.04, ALE-PLE 1.88. Pars cephalica with a pointed posterior margin dorsally, almost as long as wide (2.54 long, 2.83 wide). Chelicerae covered with black and few white setae. Leg I with a white ring of setae at joints, black; leg II-IV with white setae dorsally. Leg measurements: Leg I 6.54 (1.95+2.15+1.32+1.12); leg II 5.11 (1.51+1.67+1.00+0.93); leg III 4.55 (1.47+1.50+0.81+0.77); leg IV 6.12 (1.93+2.22+1.14+0.83). Abdomen dark brown, with four black spots, covered with dense white setae dorsally; ventrum with black setae, sigilla conspicuous, surrounded by black setae.

Palp (Fig. 5 ). Tegulum round. Conductor height is greater than width, with a slight shoulder and curved terminal tooth; the height of the lamella is almost twice the length of terminal tooth; groove deep and narrow.

Female. Unknown.

Diagnosis

Male of Eresus yukuni sp. n. is similar to the E. lavrosiae Mcheidze, 1997 by having 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 (Fig. 2 A and B; Zamani et al. 2020, fig. 15). However, this species can be distinguished from E. lavrosiae by the abdomen with dense white setae dorsally (Fig. 2 A) [vs. with a frontally abrupt white circle in E. lavrosiae ( Zamani et al. 2020, fig. 15)]. The palps are similar to those of E. lavrosiae by the strongly curved terminal tooth and the conspicuously deep lamellar groove, but can be distinguished by the shoulder near the base of the embolus in retrolateral view (Fig. 5 B) (vs. shoulder far from the base of the embolus in E. lavrosiae ( Zamani et al. 2020, fig. 19) and the conductor higher than wide in ventral view (Fig. 5 C) [vs. wider than high in E. lavrosiae ( Zamani et al. 2020, fig. 18)].

Etymology

The species is named after Mr. Kun Yu, who collected the holotype; noun (name) in the genitive case.

Distribution

Known only from the type locality (Xinjiang, China).

Figures

Figure 2. Eresus da sp. n. holotype female (A, B) and E. yukuni sp. n. holotype male (C, D), habitus. A, C dorsal view; B, D lateral view.

Figure 5. Eresus yukuni sp. n., holotype, right palp (Horizontal flip). A conductor, prolateral view; B same, ventral view; C same, retrolateral view; D palp, prolateral view; E same, retrolateral view.