Dialarnaca zhoui Shi & Bian

Shi, Fu-Ming, Bian, Xun & Guo, Li-Ying, 2016, First record of the genus Dialarnaca Gorochov, 2005 from China, with description of two new species (Orthoptera, Gryllacrididae, Gryllacridinae), ZooKeys 558, pp. 1-8 : 4-6

Taxon classification Animalia Orthoptera Gryllacrididae

Dialarnaca zhoui Shi & Bian sp. n. Map 1, Figs 12-17, 20-21

Type material.

Holotype: male, pinned, China, Yunnan, Jinping, Pinghe, 12 June 2009, coll. by Fu-Ming Shi.

Diagnosis.

This species differs from Dialarnaca roseola Gorochov, 2005 and Dialarnaca longicerca Shi & Bian, sp. n. by: the posterior area of male subgenital plate trapezoidal projected, styli located on lateral margins near middle area of subgenital plate. In Dialarnaca roseola , posterior area of male subgenital plate slightly projected, centre of which with 1 shallow concavity. It can be distinguished from Dialarnaca longicerca sp. n. by the shape of male cerci and subgenital plate.

Description.

Male. Fastigium verticis broad, about 1.5 times as wide as scape. Eyes ovoid; ocelli conspicuous. Scape about three-quarters length of eye, pedicel about half as long as scape (Fig. 12). Anterior margin of pronotum slightly projected, posterior margin almost truncate, ventral margin of lateral lobes undulated (Figs 12-13). Hind femora with 7-9 pairs of spines on ventral surface, tibiae with 4-5 pairs of spines on dorsal surface. Posterior margin of ninth abdominal tergite projecting backwards, centre tubercular; posterior margin of tenth abdominal tergite with 1 pair of short, triangular hooks in the middle, the apices slightly directing forwards in lateral view (Figs 15-16, 20-21). Cerci approximately 3.9 mm, conical, nearly straight, apices obtuse (Figs 16-17). Subgenital plate longer than broad, anterior margin almost straight, posterior area obviously projecting backwards, nearly trapezoid, posterior margin almost straight; styli long (about 0.94 mm), cylindrical, located on lateral margins near middle area of subgenital plate (Fig. 17).

Female. This species is known only from the holotype.

Coloration. Body reddish yellow. Labrum yellow, eyes brown, ocelli yellow. Spines of all legs black.

Measurements

(mm). Male: body w/wings 42.0, body w/o wings 23.7, pronotum 6.5, tegmen 35.5, hind femur 18.3.

Distribution.

China (Yunnan).

Etymology.

This species is named in honour of Dr. Shan-Yi Zhou who provided much assistance in collecting specimens.