Dianemobius csikii ( Bolívar, 1901 )

He, Zhixin, Zhang, Tao & Ma, Libin, 2021, Crickets of subfamily Nemobiinae Saussure, 1877 (Orthoptera: Grylloidea; Trigonidiidae) from China with descriptions of new genera and new species, Zootaxa 5011 (1), pp. 1-70 : 11-12

Dianemobius csikii ( Bolívar, 1901)

( Figs. 4–6 )

Nemobius csikii Bolívar, 1901: 243

Pteronemobius csikii, Chopard, 1925: 507

Dianemobius csikii, Gorochov, 1981: 26 Materials examined. China: 3 males & 4 females, Ningxia, Yanchi, Tongjijuan , viii-13-2020, Libin Ma coll. (SNNU).

Description. Male. Body size medium for the genus. Head as wide as the anterior of pronotum, frontal rostrum about twice wider than antennal scape; median ocellus small and forward projected; lateral ocelli rather small; apical joint of maxillary palpi longer than the 3rd joint, widened and truncated apically; apical joint of labial palpi rather thin and claviform. Pronotum trapeziform, slightly wider posteriorly. Tegmina extending to 7th segment of abdomen; mirror small, distinctly longer than width. Fore tibia only bearing outer tympanum. Hind tibia bearing three dorsal spurs outside and four inside; and hind tibia bearing three apical spurs on two sides respectively.

Genitalia. Epiphallus long; lateral lobe of epiphallus finger-like and longer than ectoparamere; ectoparamere shaped as crab pincer and pointed inward.

Female. Similar to male but forewings rather short. Ovipositor straight and shorter than cercus.

Coloration. Body colored pale yellow. Head and pronotum colored pale yellow and ornamented with several small dark spots. Tegmen colored pale.

Measurements (mm). Male (n=3). BL 6.56±0.98, HW 1.76±0.26, PL 1.41±0.15, TL 3.86±0.22, HFL 4.62±0.59. Female (n=4). BL 7.17±0.64, HW 1.86±0.41, PL 1.54±0.32, TL 4.14±0.51, HFL 5.50±0.87, OL 5.06±0.44.

Figures

FIGURE 4. D. csikii. Habitus (alive) in field. A. Male. B. Female.

FIGURE 5. Habitus photographs of D. csikii. A. Male. B. Female. Scale bar: 2 mm.

FIGURE 6. Male genitalia of D. csikii. A. Dorsal view. B. Lateral view. C. Ventral view.