Polionemobius taprobanensis ( Walker, 1869 )

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 : 38-40

Polionemobius taprobanensis ( Walker, 1869)

( Figs. 39–41 )

Trigonidium taprobanense Walker, 1869: 102

Nemobius taprobanensis, Saussure, 1877: 255

Pteronemobius taprobanensis, Uvarov, 1926: 288

Dianemobius taprobanensis, Gorochov, 1981: 21–26

Dianemobius (Polionemobius) taprobanensis, Gorochov, 1983: 43

Polionemobius taprobanensis, Ichikawa et al., 2000: 292

Materials examined. China: 6 males & 2 females, Hainan, Wuzhishan National Natural Reserve , viii-17-2019, Zhixin He & Tao Zhang coll. ( SNNU) .

Description. Male. Body size small for the genus. Head small, round, slightly wider than the anterior of pronotum. Rostrum narrower than antennal scape. Median ocellus round and smallest, lateral ocelli oval-like. Eyes rather large. Postclypeus narrowed medially, anteclypeus transverse wide. Apical joint of maxillary palpi slightly longer than the third, depressed and widened, with rounded apex; apical joint of labial palpi rod-like, longer than remainder sections, depressed and widened. Pronotum transverse wide, trapezoid; anterior margin straight and the posterior somewhat convex, posterior margin wider than the anterior, middle of both lateral edges slightly concave. Tegmen bearing an oblique vein and three chord veins. Apical region degraded, lateral region bearing four Sc branches. Hind wings extremely long, about two times longer than tegmen. Fore tibia only possessing external tympanum, elongate oval-like. Hind tibia bearing four dorsal spurs inside and three outside; and hind tibia bearing three apical spurs on both sides respectively.

Genitalia. Epiphallus well-developed but median lobe not obvious, lateral lobe long and apically blunt. Ectoparamere transverse and short.

Female. Tegmen reaching middle part of abdomen, dorsal area bearing four longitudinal veins, distal part roundly; hind wings degraded. Hind tibia bearing three dorsal spurs on two sides respectively. Ovipositor swordlike.

Coloration. Body colored yellowish brown. Occiput ornamented with six brown stripes, face colored dark; apical joint of maxillary palpi colored dark, remainder joints pale yellow. Pronotum ornamented with brown transverse stripes. Legs colored light yellowish brown.

Measurements (mm). Male (n=6). BL 4.89±1.32, HW 1.36±0.23, PL 1.09±0.28, TL 2.92±0.46, HFL 3.48±0.67. Female (n=2). BL 5.18±1.15, HW 1.42±0.19, PL 1.21±0.27, TL 2.57±0.40, HFL 3.78±0.68, OL 2.46±0.57.

Figures

FIGURE 39. P. taprobanensis. Habitus (alive) in field. A. Male. B. Female.

FIGURE 40. Habitus photographs of P. taprobanensis. A. Male. B. Female. Scale bar: 2 mm.

FIGURE 41. Habitus photographs of P. taprobanensis. A. Dorsal view. B. Lateral view. C. Ventral view.