Parapteronemobius dibrachiatus ( Ma & Zhang, 2015 )

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 : 31-33

Parapteronemobius dibrachiatus ( Ma & Zhang, 2015)

( Figs. 30–32 )

Caconemobius dibrachiatus Ma & Zhang, 2015: 587

Parapteronemobius dibrachiatus, Gorochov et al., 2018: 301

Materials examined. China: 4 males & 4 females, Guangdong, Shenzhen, Yangmeikeng , ix-29-2014, Tao Zhang coll. ( SNNU) .

Description. Male. Body size large. Head small, slightly wider than the anterior margin of pronotum. Rostrum slightly wider than antennal scape. Ocelli round, median ocellus slightly larger than lateral ones. Eyes rather large. Postclypeus transverse wide, anteclypeus slightly narrowed. Apical joint of maxillary palpi much 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 posterior margin somewhat convex, posterior margin wider than the anterior, middle of both lateral edges slightly concave. Tegmen absent. Tympanum absent. Hind tibia bearing two apical spurs inside and three outside; and hind tibia bearing three dorsal spurs outside and one inside.

Genitalia. Sclerotized portions of epiphallus armed with distal margin trapezoidal and the proximal bisinuate. Distal part of ectoparamere trapezoid.

Female. Similar to male. Ovipositor straight and long, somewhat longer than abdomen. Apex acute with large dorsal valves and small ventral valves.

Coloration. Body grey and ornamented with brown patterns. Ovipositor reddish brown with lateral median line dark brown.

Measurements (mm). Male (n=4). BL 7.60±0.62, HW 2.39±0.16, PL 1.73±0.12, HFL 5.85±0.64. Female (n=4). BL 7.51±0.49, HW 2.26±0.19, PL 1.84±0.22, HFL 5.91±0.86, OL 5.65±0.27.

Genus Polionemobius Gorochov, 1983

Dianemobius (Polionemobius) Gorochov, 1983: 44

Polionemobius, Gorochov, 1986: 18

Type species: Polionemobius taprobanensis ( Walker, 1869)

Key to most Polionemobius species in China (based on adult males)

1. Antenna not concolorous, proximally yellowish white and distally dark.......................................................................................................... Polionemobius flavoantennalis ( Shiraki, 1911)

- Antenna concolorous.................................................................................. 2

2. Tegmen brown with dark spots........................................ Polionemobius taprobanensis ( Walker, 1869)

- Tegmen dark brown................................................................................... 3

3. Epiphallus widened.................................................. Polionemobius yunnanus Liu & Shi, 2014

- Epiphallus very narrowed...................................................... Polionemobius chayuensis sp. n.

Figures

FIGURE 30. P. dibrachiatus. Habitus (alive) in field. A. Male. B. Female.

FIGURE 31. Habitus photographs of P. dibrachiatus. A. Male. B. Female. Scale bar: 2 mm.

FIGURE 32. Male genitalia of P. dibrachiatus. A. Dorsal view. B. Lateral view. C. Ventral view.