Dialarnaca Gorochov, 2005

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 : 2-3

Taxon classification Animalia Orthoptera Gryllacrididae

Genus Dialarnaca Gorochov, 2005

Dialarnaca : Gorochov 2005: 821 (English translation by Entomological Review: 931).

Type species.

Dialarnaca roseola Gorochov, 2005, by original designation.

Description.

Body medium, form slender. Eyes kidney-shaped, prominent; ocelli small, inconspicuous. Humeral sinus of pronotum distinct. Tegmina and hind wings developed, far surpassing apices of hind femora; M vein of tegmina simple, free, not united with R vein. Fore coxae with one small spine; fore and middle femora unarmed on ventral surface, tibiae with five pairs of movable ventral spines (including a pair of apical spines); middle tibiae with an inner apical spine on dorsal surface. Hind femora with two rows of minute spines on ventral surface; tibiae with two rows of spines on dorsal surface, subapices with 1 pair of spines on ventral surface, apices with one pair of dorsal spines, the inner one obviously longer than outer one, and two pairs of ventral spines. Second and third abdominal tergites with two rows of transverse stridulatory teeth on lateral margins separately. MALE: ninth abdominal tergite without any hook, centre of posterior margin with a large tubercular process, the angular apex of which slightly directing downwards; tenth abdominal tergite in the form of transverse sclerite, posterior area projecting backwards, membranous, the apex with 1 pair of heavily sclerotized hooks, which curved upwards; subgenital plate variable with well-developed styli; genitalia entirely membranous. FEMALE: posterior area of seventh abdominal sternite projecting backwards; basal area of subgenital plate with numerous rugulae.

Diagnosis.

The genus can be identified by the following characters: male ninth abdominal tergite without any process, posterior area of tenth abdominal tergite membranous with one pair of sclerotized apical hooks, which curved upwards. Because only one female is known, the diagnosis of the genus is insufficient.

Key to the species of Dialarnaca