Devade mongolica Esyunin & Marusik, 2001

Wang, Lu-Yu, Yang, Yun-Shan, Marusik, Yuri M. & Zhang, Zhi-Sheng, 2025, Review of the spider genus Devade Simon, 1885 (Araneae: Dictynidae) from China, European Journal of Taxonomy 989, pp. 289-310 : 296-299

Devade mongolica Esyunin & Marusik, 2001

Figs 4–5 , 11

Devade mongolica Esyunin & Marusik, 2001: 129 , fig. 1 (♀).

Chinese name

=古带ḍ

Differential diagnosis

The male of this species resembles D. pusilla ( Lehtinen 1967: 450, fig. 284) in having a short palpal tibia, almost half the length of the cymbium, but it differs from the latter by the mesal process of the conductor posterior arm almost directed towards the ventral in retrolateral view ( Figs 4B , 5D ) (vs towards retrolateral), and the retrolateral process is pointed ( Figs 4B–C , 5D–E ) (vs rounded). The female of this species is most similar to D. qiemuensis ( Figs 8D–E , 9F–G , 10 F–G ) in having a long,

narrow septum, almost reaching the epigastral fold, but it differs from the latter by the rounded end of the septum ( Figs 4D , 5F ) (vs truncate, Figs 8D , 9F , 10F ).

Material examined

CHINA • 13 ♂♂, 24 ♀♀; Xinjiang, Hutubi Co., Xidaqiao ; 44°12′04″ N, 86°51′53″ E; elev. 526 m; 19 Apr. 2022; Y.S. Yang leg.; SWUC-DIDM-01 to SWUC-DIDM-37 .

Description

Male (SWUC-DIDM-01, Fig. 5A )

MEASUREMENTS. Total length 3.02. Carapace 1.47 long, 1.12 wide; abdomen 1.57 long, 0.94 wide. Eye sizes and interdistances: AME 0.09, ALE 0.08, PME 0.08, PLE, 0.09; AME–AME 0.05, AME– ALE 0.01, PME–PME 0.06, PME–PLE 0.04, ALE–PLE 0.02. MOA 0.23 long, anterior width 0.22, posterior width 0.25. Clypeus height 0.05.

CARAPACE. Light with dark margins and dark radial stripes.

CHELICERAE. With 2 promarginal and 2 retromarginal teeth.

LEG MEASUREMENTS. I = 4.67 (1.33, 1.64, 1.02, 0.68); II = 4.46 (1.28, 1.51, 1.00, 0.67); III = 3.71 (1.13, 1.23, 0.91, 0.44); IV = 5.23 (1.47, 1.75, 1.34, 0.67).

ABDOMEN. Light colored, with transverse bands.

PALP ( Figs 4A–C , 5C–E ). Tibia short, almost as long as its distal width, less than half of cymbial length in retrolateral view. Retrolateral tibial apophysis tip directed almost ventrally in dorsal view. Cymbium 2 times as long as wide, tip as long as tibia; cymbial fold indistinct in dorsal view and easily seen in retrolateral view. Bulb about as long as wide; posterior arm of conductor (C) with two large processes: mesal process (MPA) short and hook-like; retrolateral process (RPA) wide and laminar, almost 3 times as long as mesal process. Embolus originating at about 12:00 o’clock position, distal part hidden by conductor.

Female (SWUC-DIDM-02, Fig. 5B )

MEASUREMENTS. Total length 3.02. Carapace 1.24 long, 0.93 wide; abdomen 1.93 long, 1.45 wide. Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.07, PLE, 0.08; AME–AME 0.05, AME– ALE 0.01, PME–PME 0.07, PME–PLE 0.05, ALE–PLE 0.03. MOA 0.20 long, anterior width 0.18, posterior width 0.22. Clypeus height 0.07.

LEG MEASUREMENTS. I = 3.24 (0.99, 1.12, 0.67, 0.46); II = 3.10 (0.94, 1.04, 0.61, 0.51); III = 2.78 (0.80, 0.89, 0.63, 0.46); IV = 3.83 (0.99, 1.30, 1.01, 0.53).

CARAPACE AND ABDOMEN. Same morphological pattern as in male except lighter in color.

EPIGYNE ( Figs 4D , 5F ). Epigynal plate almost 2 times as wide as long, with anterior notch (No). Fovea V-shaped with distinct lateral margins, divided by septum. Septum reaching posterior margin, wider anteriorly.

VULVA ( Figs 4E , 5G ). Copulatory ducts extremely short. Spermathecae globular, separated by more than 3.5 times their diameters.

Distribution

China (Xinjiang) ( Fig. 11 ), Mongolia.

Figures

Fig. 4. Devade mongolica Esyunin & Marusik, 2001. A–C. Male (SWUC-DIDM-01). D–E. Female (SWUC-DIDM-02). A. Left palp, ventral view. B. Same, retrolateral view. C. Same, dorsal view. D. Epigyne, ventral view. E. Vulva, dorsal view. Abbreviations: AA = anterior arm of conductor; BF = basidorsal fold of cymbium; CO = copulatory opening; Em = embolus; FD = fertilization duct; MPA = mesal process of conductor posterior arm; RPA = retrolateral process of conductor posterior arm; RTA = retrolateral tibial apophysis; Se = septum; Sp = spermatheca. Scale bars = 0.2 mm.

Fig. 5. Devade mongolica Esyunin & Marusik, 2001.A, C–E. Male (SWUC-DIDM-01).B, F–G. Female (SWUC-DIDM-02). A. Habitus, dorsal view. B. Habitus, dorsal view. C. Left male palp, ventral view. D. Same, retrolateral view. E. Same, dorsal view. F. Epigyne, ventral view. G. Vulva, dorsal view. Scale bars: A–B = 0.5 mm; C–G = 0.2 mm.

Fig. 11. Distribution of the species of genus Devade in China.

Fig. 8. Devade qiemuensis (Hu & Wu, 1989) stat. rev. from Xinjiang. A–C. Male (SWUC-DIDQ-272). D–E. Female (SWUC-DIDQ-274).A. Left palp, ventral view.B. Same, retrolateral view.C. Same, dorsal view. D. Epigyne, ventral view. E. Vulva, dorsal view. Abbreviations: AA = anterior arm of conductor; BF = basidorsal fold of cymbium; CO = copulatory opening; Em = embolus; FD = fertilization duct; MPA = mesal process of conductor posterior arm; RPA = retrolateral process of conductor posterior arm; RTA = retrolateral tibial apophysis; Se = septum; Sp = spermatheca. Scale bars = 0.2 mm.

Fig. 9. Devade qiemuensis(Hu & Wu, 1989) stat. rev. from Xinjiang.A, C–E. Male (SWUC-DIDQ-272). F–G. Female (SWUC-DIDQ-274).A. Habitus, dorsal view.B. Habitus, dorsal view.C. Left palp, ventral view. D. Same, retrolateral view. E. Same, dorsal view. F. Epigyne, ventral view. G. Vulva, dorsal view. Scale bars: A–B = 1 mm; C–G = 0.2 mm.

Fig. 10. Devade qiemuensis (Hu & Wu, 1989) stat. rev. from Inner Mongolia, A, C–E. Male (SWUC- DIDQ-73). F–G. Female (SWUC-DIDQ-79). A. Habitus, dorsal view. B. Habitus, dorsal view. C. Left palp, ventral view. D. Same, retrolateral view. E. Same, dorsal view. F. Epigyne, ventral view. G. Vulva, dorsal view. Scale bars: A = 1 mm; B = 2 mm; C–G = 0.2 mm.