Gryllacris menglaensis Bian, Zhu et Shi, 2017

Bian, Xun, Zhu, Qidi & Shi, Fuming, 2017, Two new species of Gryllacridinae (Orthoptera: Gryllacrididae) from Yunnan, China, Far Eastern Entomologist 338 (338), pp. 1-9 : 6-8

Gryllacris menglaensis Bian, Zhu et Shi , sp. n.

Figs 19–33

TYPE MATERIAL. Holotype: male – China: Yunnan, Xishuangbanna, Mengla ,

29. V 2015, coll. Ping Wang. Paratypes: 2 ♀, the same data as in holotype .

DESCRIPTION. MALE. Body large. Frons smooth, without obviously puncta-

tion. Fastigium verticis broad, about 2 times wider than antennal scape ( Fig. 19 ).

Antennal scape as long as the total length of pedicel and first segment of flagellum.

Eyes protruding outward; ocelli distinct, medium ocellus large, lateral ocelli occu-

pying on both sides of fastigium verticis ( Fig. 19 ). Apical segments of maxillary palpi slight longer than subapical ones, apices obliquely truncated, slightly inflate.

Centre of anterior margin of pronotum protruding, posterior margin relatively straight; lateral lobes longer than high, subtrapezoid, anterior and posterior margins slightly oblique, ventral surface straight.

head and pronotum (29 – dorsal view, 30 – lateral view); 31 – apex of abdomen, lateral view;

32 – subgenital plate, ventral view; 33 – apex of ovipositor, lateral view.

Fore coxae with 1 small spine. Fore and middle femora unarmed on ventral surface, tibiae armed ventrally with 4 pairs of movable long spines and 1 pair of apical spines, the apical spines small; middle tibiae with 1 internal apical spine on dorsal surface. Hind femora with 8 spines on ventral surface, apical spines obviously longer than basal spines; tibiae with 6 pairs of spines on dorsal surface, 1 pair of dorsal apical spines and 2 pairs of ventral apical spines, interno-apical spines distinctly longer than externo-apical ones, subapices with 1 pair of spines on ventral surface.

Tegmina surpassing apex of abdomen, reaching to subapical area of hind tibiae;

hind wings longer than tegmina.

The 9th abdominal tergite narrow, centre of posterior margin with 4 small tuber-

cular processes, directing backward ( Figs 23–25 ); ventral surface of processes nearly triangular, extending to downward, ( Fig. 22 ). Cerci slender, pointing posterior margin, slight curved inward. Subgenital plate transverse and broad, basal margin relatively straight, posterior margin arced, centre with 1 small triangular concavity

( Figs 26, 27 ); styli slender, longer than subgenital plate, apices obtusely rounded.

FEMALE. Body larger than male. Cerci conical. The 7th abdominal sternum transverse and broad, ventral surface with 1 transverse carina, semimembranous between the apices and basal area of subgenital plate ( Fig. 32 ). Basal area of subgenital plate broad, narrowing, basal margin arced concave, posterior margin angular concave, the lateral lobes nearly triangular ( Fig. 32 ); ventral surface distinctly raised,

forming 1 pair of longitudinal carinae, between the longitudinal carinae subrectangular concave and with 1 small process, the apical half of process curved unpward, apex obtusely rounded with slightly concave ( Fig. 32 ). Ovipositor obviously curved upward, dorsal and ventral margins smooth, apices of dorsal valvulae slightly expended, obliquely truncated ( Fig. 33 ).

COLORATION. Body yellowish brown, unicolor. Eyes brown, ocelli light yellow; base of labrum light red, apex blackish brown. Apices of claws, apices of spines of hind femora and spines of tibiae black. Cells of apical half of tegmina with light black spots. Abdominal tergite with brown stripes.

MEASUREMENTS (mm). Length of body: ♂ 29.2, ♀ 28.6–34.3; pronotum: ♂

7.4, ♀ 8.5–8.6; tegmina: ♂ 36.6, ♀ 35.5–37.1; hind femora: ♂ 20.3, ♀ 20.8–22.2;

ovipositor: 27.7–28.5.

DISTRIBUTION. China (Yunnan).

DISCUSSION. This species differs from other species of the genus by: centre of posterior margin of 9th abdominal tergite with 4 small tuberculate processes, ventral surface with 1 triangular leaf-shaped process, its posterior margin slightly concave;

ventral surface of female subgenital plate distinctly raised, middle area subrectangular concave with 1 small process, its apical half curved dorsad, its apex obtusely rounded.

ETYMOLOGY. The new name is derived from Mengla, the type locality of the new species.

ACKNOWLEDGEMENTS

This project is supported by the National Natural Science Foundation of China

(No. 31372232, 31672259).

Figures

Figs. 19–27. Gryllacris menglaensis sp. n., male. 19 – head, frontal view; 20–21 – head

Figs. 28–33. Gryllacris menglaensis sp. n., female. 28 – head, frontal view; 29 –30 –