Dysdera dushengi, Lin & Chang & Li, 2020

Lin, Yejie, Chang, Wan-Jin & Li, Shuqiang, 2020, Dysdera dushengi sp. nov., the easternmost species of the spider family Dysderidae (Arachnida: Araneae), Zoological Systematics 45 (2), pp. 97-103: 100-102

publication ID

http://doi.org/ 10.11865/zs.202014

publication LSID

lsid:zoobank.org:pub:BE9DD93B-1FFE-4748-B1C6-F16CFCE0482A

DOI

http://doi.org/10.5281/zenodo.5105805

persistent identifier

http://treatment.plazi.org/id/03EE87CE-FFF3-3B56-DC99-FE12FB0B1738

treatment provided by

Carolina

scientific name

Dysdera dushengi
status

sp. nov.

Dysdera dushengi   sp. nov. ( Figs 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )

Type material. Holotype ♂ (IZCAS-Ar39719), CHINA: Xinjiang Uygur Autonomous Region, Ili Kazak Autonomous Prefecture, 10 km N. of Kekedala City , 44.0244°N, 81.0180°E, elev. 751 m, 06.IV.2019, Sheng Du leg. GoogleMaps   Paratypes. 1♂, 1♀ (IZCAS-Ar39720–IZCAS-Ar39721), same data as holotype GoogleMaps   .

Etymology. The species is named after Mr. Sheng Du, the collector of the holotype; noun (name) in genitive case.

Diagnosis. Dysdera dushengi   sp. nov. is similar to D. pamirica Dunin, 1992   , which has been found only at the ridge of Peter the Great, Central Tajikistan (38.7833°N, 70.3000°E, see Dunin, 1992). Males of the two species are similar in: the ratio of the height of the tegulum to the height of the distal division, which is 1: 2 in lateral view, the semi-circular crest, and the posterior leaf-shaped apophysis but can be distinguished from D. pamirica   by the tegulum and distal division which are in a straight line in lateral view (vs. angle between tegulum and distal division approximately 10° in D. pamirica   ) and the height of the tegulum to the length of the widest part of the crest is 1:2 (vs. 1: 1 in D. pamirica   ) ( Figs 2 View Figure 2 , 4 View Figure 4 A–B). Females have a similar dorsal arc of the anterior diverticulum but can be distinguished by the spermatheca which are not connected to the dorsal arc of anterior diverticulum (vs. connected to the dorsal arc of anterior diverticulum in D. pamirica   ), and the two extremities of the dorsal arc of the posterior diverticulum are well-developed (vs. less well developed in D. pamirica   ) ( Figs 3 View Figure 3 , 4C View Figure 4 ).

Description. Male ( Figs 1 View Figure 1 A–B, 2, 4A–B). Total length 7.37. Carapace 3.21 long, 2.31 wide. Abdomen 4.25 long, 2.34 wide. Eye sizes and inter-distances: AE 0.20, PLE 0.12, PME 0.12, AE–AE 0.44, PME–PME 0.28, PME–PLE 0.25, AE– PLE 0.28. PLE–PLE 0.52. Chelicerae 2.00 long. Fang 1.40. Legs: I 10.25 (2.88 + 3.85 + 2.88 + 0.64), II 9.40 (2.88 + 3.21 + 2.56 + 0.75), III 6.75 (2.25 + 2.00 + 2.25 + 0.25), IV 8.38 (3.00 + 2.50 + 2.50 + 0.38). Carapace red, smooth, lighter posteriorly, with sparse setae. Clypeus dark red. Chelicerae long, red, with 1 promarginal tooth and 2 retromarginal teeth. Endites and labium red. Sternum colored as endites, with sparse setae. Legs orange. Spination of leg I: femur 3d; leg II: femur 3d; leg III: femur 11–6r, 4–0v, tibia 5–6d, 5–7p, 4v, metatarsus 5–7d, 3–2p; leg IV: femur 3d, 4–2r, tibia 7–4d, 5–4p, metatarsus 6–9d, 2p, 3–0r, 4v. Abdomen oval, dorsum pale yellow, covered with setae.

Bulb ( Figs 2 View Figure 2 , 4 View Figure 4 A–B) three times longer than tegulum; distal division straight in lateral view; crest semicircular, half length of tegulum; lateral sheet well-developed, with an apophysis; anterior apophysis of lateral sheet absent; AL present; posterior apophysis leaf-shaped, perpendicular to tegulum in lateral view, ratio of lateral length to length of tegulum 2: 1.

Female ( Figs 1 View Figure 1 C–D, 3, 4C). Total length 7.69. Carapace 2.80 long, 1.92 wide. Abdomen 4.49 long, 0.96 wide. Eye sizes and inter-distances: AE 0.16, PLE 0.12, PME 0.12, AE–AE 0.40, PME–PME 0.24, PME–PLE 0.25, AE–PLE 0.28. PLE– PLE 0.48. Chelicerae 1.25. Fang 1.17. Legs: I 7.80 (2.20 + 3.00 + 2.00 + 0.60), II 6.74 (2.19 + 2.75 + 1.20 + 0.60), III 6.00 (1.80 + 2.00 + 1.60 + 0.60), IV 6.89 (2.56 + 1.50 + 2.20 + 0.63). Spination of leg I: femur 3d, 3–0p; leg II: femur 2d; leg III: femur 3–0d, 1–0r, tibia 3r, 3–5p, 3–1d, metatarsus 3–6d, 2–3p, 4r, 1–3v; leg IV: femur 7–4r, tibia 4–5p, 3–2d, metatarsus 3– 7d, 2– 1p. Appearance as in male.

Endogyne ( Figs 3 View Figure 3 , 4C View Figure 4 ): Anterior spermatheca with straight lateral wings, four times wider than long, neck of spermatheca visible; dorsal arc of anterior diverticulum ladder-shaped, two times wider than long; terminus of dorsal arc of posterior diverticulum well-developed; ventral wall triangular.

Distribution. Known only from the type locality.

Life history. All specimens of the new species were collected under stones on a rocky massif.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Dysderidae

Genus

Dysdera