Episinus ornithorrhynchus, Liu & Agnarsson & Liu & Zhu, 2022

Liu, Fengjie, Agnarsson, Ingi, Liu, Jie & Zhu, Yang, 2022, Description and phylogenetic analysis of two new Episinus (Araneae, Theridiidae) species from China, ZooKeys 1125, pp. 33-46 : 33

publication ID	https://dx.doi.org/10.3897/zookeys.1125.90212
publication LSID	lsid:zoobank.org:pub:021F82C7-5C47-4491-BB36-E3D95F395FEE
persistent identifier	https://treatment.plazi.org/id/D15231DB-9F9B-4A5D-A517-40A941EA92B6
taxon LSID	lsid:zoobank.org:act:D15231DB-9F9B-4A5D-A517-40A941EA92B6
treatment provided by	ZooKeys by Pensoft
scientific name	Episinus ornithorrhynchus
status	sp. nov.

Treatment

Episinus ornithorrhynchus sp. nov.

Figs 1A-D View Figure 1 , 2A-E View Figure 2 , 3A, B View Figure 3 , 5 View Figure 5

Type material.

Holotype: ♂, China, Yunnan Province: Mengsong Town, Mengsong Township Central Primary School, (22°4'12"N, 100°33'36"E, 1340 m alt.), 1 August 2020, Z.C. Li, R. Zhong, W.Z. Deng, W. Zhang, and Y.T. Zhang leg. Paratypes: 1♂2♀, same data as holotype; Yunnan Province: 2♀, Menglun Town, Baka Xiaozhai, (22°4'12"N, 101°12'0"E, 810 m alt.), 24 July 2020, Z.C. Li, R. Zhong, W.Z. Deng, W. Zhang, and Y.T. Zhang leg.

Diagnosis.

Males are similar to E. baoshanensis Liu et al. (2019) but can be distinguished from them by the palpal structure: 1) embolus extends along the left lower lateral aspect of the genital bulb to the posterior margins, but the embolus mainly encircles the left upper lateral and anterior margins of the bulb in E. baoshanensis (Figs 2C, D View Figure 2 , 3A, B View Figure 3 ); 2) conductor with a sharp tip in ventral view and not bifurcated, but conductor sclerotized and tip bifurcated in E. baoshanensis (Figs 2C View Figure 2 , 3A View Figure 3 ). Females are similar to E. nubilus but can be distinguished from them by the direction of the copulatory duct: fertilization ducts are slightly shorter in the new species, but long and C-shaped in E. nubilus (Fig. 1D View Figure 1 ).

Etymology.

The specific name is derived from the Latin adjective ornithorrhynchus, meaning bird’s beak, referring to the shape of the conductor; adjective.

Description.

Male (paratype): total length 3.79; prosoma length 1.60, width 1.39; opisthosoma length 2.19, width 1.67; eye diameters: ALE 0.10, AME 0.10, PLE 0.10, PME 0.10; eye interdistances: AME-AME 0.10, AME-ALE 0.05, PME-PME 0.10, PME-PLE 0.05; clypeus height 0.24; leg measurements: I 6.84 (1.83, 0.41, 2.11, 1.78, 0.71), II 5.04 (1.46, 0.39, 1.14, 1.35, 0.70), III 3.72 (1.11, 0.35, 0.73, 0.96, 0.57), IV 7.76 (2.28, 0.52, 1.70, 2.40, 0.86). Leg formula: IV, I, II, III. Overall, the color was slightly lighter and as in females (Fig. 2A, B View Figure 2 ).

Palp (Figs 2C-E View Figure 2 , 3A, B View Figure 3 ). Subtegulum mostly covered by tegulum. Embolus originates at center of palp, a slightly triangular basement that curves upward clockwise. Conductor sclerotized, with a sharp tip extending over apex of cymbium.

Female (holotype): total length 4.25; prosoma length 1.70, width 1.49; opisthosoma length 2.55, width 2.05; eye diameters: ALE 0.10, AME 0.10, PLE 0.10, PME 0.10; eyes interdistances: AME-AME 0.10, AME-ALE 0.06, PME-PME 0.08, PME-PLE 0.08; clypeus height 0.25; leg measurements: I 7.44 (2.05, 0.61, 1.79, 2.23, 0.76), II 5.06 (1.52, 0.50, 1.06, 1.30, 0.68), III 3.91 (1.28, 0.33, 0.68, 0.93, 0.69), IV 8.25 (2.36, 0.80, 1.65, 2.46, 0.98). Leg formula: IV, I, II, III. Carapace yellowish to reddish brown, with a deep transverse depression. Sternum gray-black, slightly longer than wide. Femur and tibia to tarsus yellowish white, and distal patella reddish brown (Fig. 1A, B View Figure 1 ). Opisthosoma yellowish to orange-brown, with longitudinal white stripes in ventral view, extending posteriorly and short humps on each side. Opisthosoma dorsally grayish black, with a rectangular dark spot (Fig. 1B View Figure 1 ).

Epigyna (Fig. 1C-D View Figure 1 ). Atria separated by median septum. Spermathecae slightly oval with two parallel stripes on middle part; fertilization ducts shorter.

Variation.

Total length male 3.75-3.79 (n = 2), female 4.10-4.25 (n = 4).

Distribution.

China (Yunnan Province) (Fig. 5 View Figure 5 ).