Diplocephaloides cucullus Irfan, Zhang & Peng

Irfan, Muhammad, Zhou, Gu-Chun, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Survey of Linyphiidae spiders (Arachnida: Araneae) from some Oriental Regions of China, Megataxa 15 (1), pp. 1-248 : 42-43

Diplocephaloides cucullus Irfan, Zhang & Peng , sp. n.

(兜x双头e)

Figures 51 , 52 , 310

Types. Holotype ♀ ( HNU-GZ-IV-1804 ), CHINA, Guizhou Prov.: Tongren City, Shiqian Co., Pingshan Township , Fodingshan Vill. , Fodingshan NNR , 27.332781°N, 108.151789°E, 617 m, 03.V.2018, D. Li et al. leg.

Etymology. The specific epithet is derived from Latin noun “cucullus ” meaning “hood” and referring to the ventral plate with one pair of hoods in epigyne.

Diagnosis.Diplocephaloidescucullus sp.n. resembles D. uncatus in having similar dorsal plate in ventral view ( Figs 51A, B ; Song & Li, 2010, figs 12–17), but can be distinguished by the ventral plate with one pair of hoods posteriorly in D. cucullus sp. n. ( Fig. 51A ; vs. absent); inner margin of ventral plate arc-shaped in ventral view in D. cucullus sp. n. ( Fig. 51A ; vs. straight); dorsal plate conical flask-shaped in dorsal view in D. cucullus sp. n. ( Fig. 51C ; vs. somewhat quadrate); spermatheca bean-shaped in D. cucullus sp. n. ( Fig. 51D ; vs. S-shaped).

Description.Female( Figs52A,B ):Totallength:2.07. Carapace 0.74 long, 0.68 wide, cephalic region slightly elevated, orange, cervical and radial grooves distinct. Clypeus 0.27 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum as long as wide, orange, with microsetae. Eyes: AER recurved, PER procurved. Eye sizes and interdistances: AME 0.06, ALE 0.06, PME 0.06, PLE 0.05, AME–AME 0.02, PME–PME 0.03, AME–ALE, 0.03, PME–PLE 0.05, AME–PME 0.04, ALE–ALE 0.28, PLE–PLE 0.30, ALE–PLE 0.01. Length of legs: I 2.98 (0.87, 0.92, 0.72, 0.47), II 2.87 (0.84, 0.89, 0.68, 0.46), III 2.12 (0.65, 0.65, 0.46, 0.36), IV 2.88 (0.88, 0.94, 0.66, 0.40). Tibial spine formula: 2-2-1-1. TmI 0.63 and TmIV present. Opisthosoma 1.14 long, 0.78 wide, oval, pale, dorsally with two pairs of sigillae, ventally with one pair of yellow spots near spinnerets posteriorly.

Epigyne ( Figs 51A–D ): Fissure absent; ventral plate (VP) wider than long; dorsal plate (DP) column-shaped in ventral view, partially covered by ventral plate, conical flask-shaped in dorsal view; copulatory opening (CO) present at the anterior margin of the doprsal plate; copulatory ducts (CD) long; spermathecae (S) present anteriorly, pointing towards each other; fertilization ducts (FD) extending mesally.

Male. Unknown.

Distribution. Known only from the type locality (Guizhou Province, Fig. 310 ).

Figures

FIGURE 51. Diplocephaloides cucullus sp. n., female holotype. A, B Epigyne, ventral view; C Epigyne, dorsal view, D Vulva, dorsal view. Abbreviations: CD—copulatory duct; CO—copulatory opening; DP—dorsal plate; FD—fertilization duct; S— spermatheca; VP—ventral plate.

FIGURE 52. Diplocephaloides cucullus sp. n., female holotype. A Habitus, dorsal view; B Habitus, ventral view.

FIGURE 310. Distribution of Linyphiidae species in Guizhou Prov.: 1. Bathyphantes paracymbialis Tanasevitch, 2014; 2. Bifurcia ramosa (Li & Zhu, 1987); 3. Bolyphantes aculeatus sp. n.; 4. Bolyphantes arcuatus sp. n.; 5. Bolyphantes gladius sp. n.; 7. Dicristatus denticulatus sp. n.; 8. Diplocephalus tongrenensis sp. n.; 9. Diplocephaloides cucullus sp. n.; 10. Gonatium absidatum sp. n.; 11. Tapinocyba cornuta sp. n.; 12. Gongylidium demersum sp. n.; 13. Tapinocyba pingshanensis sp. n.; 14. Hylyphantes graminicola (Sundevall, 1830); 15. Nippononeta coreana (Paik, 1991); 16. Prosoponoides sinensis (Chen, 1991); 17. Ryojius fanjingshanensis sp. n.; 18. Ryojius fodingshanensis sp. n.; 19. Scotinotylus guizhouensis sp. n.; 20. Scotinotylus longiprojectus sp. n.; 21. Spelaeus cicatrix sp. n.; 6. Trematocephalus cristatus (Wider, 1834); 22. Walckenaeria asymmetrica Song & Li, 2011; 23. Walckenaeria xingdouensis sp. n..