Metriogryllacris (Metriogryllacris) obscurata, Zhang & Pang & Bian, 2022

Zhang, Qianwen, Pang, Siyu & Bian, Xun, 2022, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) XII: Notes on the Chinese Metriogryllacris Karny, 1937, Zootaxa 5213 (1), pp. 36-48 : 41

Metriogryllacris (Metriogryllacris) obscurata sp. nov.

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Figures 5 , 10C–D

Diagnosis. The new species differs from Metriogryllacris (Metriogryllacris) bimacula Yu, Liu & Bian, 2022 in: pronotum with black margins, dorsal surface of abdomen black ( Fig. 5B ); posterior margin of ninth abdominal tergite with a triangular zone in middle, the lateral sides terminating into a spine, which directing ventrad and forward ( Fig. 5F ); the projecting lobe of male subgenital plate shorter, the posterior margin almost straight ( Fig. 5G ).

Description.Male. The following characters are in addition to those given in Metriogryllacris (Metriogryllacris) bimacula ’s description. Wings reaching the middle area of sixth abdominal tergite. Tegmina ( Fig. 10C–D ): Radius gives rise to RS in subapical area; media anterior free from base, undivided or divided in apical area ( Fig. 10D ); media posterior absent; cubitus anterior divides into two branches behind middle of tegmen ( Fig. 10C ) or not ( Fig. 10D ); cubitus posterior undivided, free throughout; with 3 anal veins. Hind femora with 9–11 internal and 6 external spines on ventral surface; tibiae with 6 internal and 7 external spines on dorsal surface. Posterior margin of ninth abdominal tergite with a triangular zone in middle, the lateral sides terminating into a spine (may be mobile in alive), its apex directing ventrad and forward ( Fig. 5F ). Subgenital plate wider than long, the lateral margins convex, apical area trapezoidal projected in the middle, posterior margin faintly concave ( Fig. 5G ); styli short, inserted at the lateral constriction.

Female. Unknown.

Coloration. Body yellowish brown. Eyes black. Median ocellus pale. Pronotum with black margins, which widened at anterior and posterior margins, disc with blackish stripes ( Fig. 5B ). Dorsal surface of abdomen black.

Measurements (mm). Male: BL 18.1, PL 4.7, TL 11.9, HFL 10.4.

Material examined. Holotype: male, Guadun, Wuyishan , Fujian, July 22, 2022, coll. by Yafei Wang.

Distribution. Fujian (Wuyishan).

Etymology. Name derived from Latin obscurat, referring to pronotum with blackish stripe along the midline.

Figures

FIGURE 5. Metriogryllacris (Metriogryllacris) obscurata sp. nov. Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; E–H. apex of abdomen: E. lateral view, F. apical view, G. ventral view, H. dorsal view.

FIGURE 10. Tegmina of Metriogryllacris spp. in dorsal view. A–B. Metriogryllacris (Metriogryllacris) nigrilimbis Liu & Bian, 2021; C–D. Metriogryllacris (Metriogryllacris) obscurata sp. nov.; E–F. Metriogryllacris (Metriogryllacris) amitarum (Griffini, 1914); G–H. Metriogryllacris (Metriogryllacris) nigrilimbis Liu & Bian, 2021; A, C, E, G. left tegmen; B, D, F, H. right tegmen; A–B. female from Longsheng, Guangxi; C–H. male.