Yunguirius parvus Wei & Liu, 2024

Wei, Mian, Liu, Jie & Wang, Kai, 2024, Four new species of the genus Yunguirius (Araneae, Agelenidae) from China, ZooKeys 1211, pp. 1-15 : 1-15

publication ID	https://doi.org/ 10.3897/zookeys.1211.126487
publication LSID	lsid:zoobank.org:pub:16DBAD49-A3D7-40F4-A1A1-FB221AB008BD
DOI	https://doi.org/10.5281/zenodo.13629964
persistent identifier	https://treatment.plazi.org/id/E2FDC5CF-C53D-47F2-9DA3-83F9C6AD20A1
taxon LSID	lsid:zoobank.org:act:E2FDC5CF-C53D-47F2-9DA3-83F9C6AD20A1
treatment provided by	ZooKeys by Pensoft
scientific name	Yunguirius parvus Wei & Liu
status	sp. nov.

Treatment

Yunguirius parvus Wei & Liu sp. nov.

Figs 2 View Figure 2 , 3 View Figure 3 , 10 View Figure 10

Type material.

Holotype ♀ ( HBU-WM-24-001 ), 1 ♀ paratype ( HBU-WM-24-002 ): China: Yunnan Province, Honghe Hani and Yi Autonomous, Gejiu County, Gejia Forest Park , 23.3893 ° N, 103.1254 ° E, elevation: 2045 m, 23. VIII. 2020, M. Wei leg. GoogleMaps

Etymology.

The specific epithet is taken from the Latin word parvus , meaning “ small ”, referring to the relatively small body type of new species; an adjective.

Diagnosis.

The females of Yunguirius parvus sp. nov. resemble those of Y. duoge in 1) the atrium is subrounded with a complete anterior margin (Fig. 2 A View Figure 2 ; fig. 2 A in Li et al. 2023); 2) the openings of the copulatory ducts are wide, approximately half the circumference of the atrium (Fig. 2 B View Figure 2 ; fig. 2 B in Li et al. 2023); 3) the blind sacs of the copulatory ducts are extremely short, symmetrical, and separate (Fig. 2 B View Figure 2 ; fig. 2 B in Li et al. 2023). In other Yunguirius species, the atrium is non-subrounded (except in Y. terebratus ) with an incomplete anterior margin (Figs 1 A View Figure 1 , 4 A View Figure 4 , 6 A View Figure 6 , 8 A View Figure 8 ; fig. 245 A in Zhu et al. 2017; figs 3 A, 4 A in Li et al. 2023), the copulatory openings are equal to or less than the length of the lateral margin of the atrium, and the blind sacs are asymmetrical and overlapping (Figs 1 B View Figure 1 , 4 B View Figure 4 , 6 B View Figure 6 , 8 B View Figure 8 ; fig. 245 B in Zhu et al. 2017; figs 3 B, 4 B in Li et al. 2023). However, Y. parvus sp. nov. can be differentiated from Y. duoge by 1) the absence of the fold (Fig. 2 A View Figure 2 ), versus being present in the latter (Fig. 2 A View Figure 2 in Li et al. 2023); 2) the blind sac is shorter than the spermathecal stalk (Fig. 2 B View Figure 2 ), versus being longer in the latter (Fig. 2 B View Figure 2 in Li et al. 2023); 3) the spermathecal stalk has a conch-shaped distal tip (Fig. 2 B View Figure 2 ), versus being nearly round in the latter (Fig. 2 B View Figure 2 in Li et al. 2023).

Description.

Female (holotype) (Fig. 3 View Figure 3 ). Carapace reddish brown. Cervical and radial groove distinct. Cephalic region moderately raised and wide, lateral margin with distinct furrows. Chelicerae with 3 promarginal teeth and 2 retromarginal teeth, condyle red. Sternum longer than wide. Abdomen pale yellow, with 5 chevron-shaped patterns, covered by hairs. Legs red. Total length 10.41. Carapace 5.85 long, 3.54 wide, cephalic region 3.12 wide. Abdomen 4.69 long, 3.10 wide. Eye size and interdistance: AME 0.19, ALE 0.23, PME 0.22, PLE 0.25; AME – AME 0.09, AME – ALE 0.14, AME – PME 0.09, ALE – PLE 0.05, PME – PME 0.06, PME – PLE 0.32. Leg measurements: Leg I 14.02 (1.80, 0.70, 3.53, 1.63, 2.78, 2.46, 1.39), leg II 12.40 (1.52, 0.69, 3.04, 1.48, 2.44, 2.23, 1.33), leg III 10.35 (1.38, 0.67, 2.43, 1.32, 1.68, 1.95, 1.08), leg IV 14.42 (1.66, 0.61, 3.50, 1.59, 2.91, 2.84, 1.41). Epigyne (Fig. 2 View Figure 2 ). Epigynal teeth absent. Atrium centrally situated, subrounded, anterior margin complete. Epigynal sclerite small. Hoods weak, vertically oriented, situated laterally. Fold absent. Copulatory ducts openings broad, subequal to ½ the circumference of atrium, laterally originated, blind sacs short, symmetric, and untouched. Spermathecal bases consisted of 2 spherical chambers, spermathecal stalks long, with distal tips conch-shaped, spermathecal heads anteriorly originated, long and sclerotized. Fertilization ducts posteriorly situated.

Male. Unknown.

Distribution.

China (Yunnan).