Metriogryllacris (Metriogryllacris) bimacula Yu & Liu & Bian 2022, sp. nov.
Creators: name: Yu, Lijiang
name: Liu, Hong
name: Bian, Xun
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllacrididae
Metriogryllacris
Metriogryllacris bimacula

description: Metriogryllacris (Metriogryllacris) bimacula sp. nov.
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Figures 1–2
Diagnosis. This new species differs from other species of Metriogryllacris (Metriogryllacris) amitarum group by: wings only reaching the middle area of fifth abdominal tergite; pronotum without black margins and longitudinal black median band, and only with 1 black spot at anterior and posterior margins respectively (Fig. 1B); spines of male ninth abdominal tergite slender, and directing downwards and slightly outwards (Fig. 1G–I).
Description. Male. Body medium-sized. Frons ovoid with very fine transverse riffles and sparse punctures (Fig. 1A). Ocelli indistinct.
Pronotum with anterior margin slightly projecting, posterior margin nearly straight (Fig. 1B); lateral lobes longer than deep, posterior margin of ventral margin slightly extending downward (Fig. 1C). Fore coxae with 1 spine. Fore and middle femora unarmed on ventral surfaces, tibiae with 5 pairs of ventral spurs, including 1 pair of apical ones. Hind femora with 9–12 internal and 7–8 external spines on ventral surface; tibiae with 5–6 internal and 5 external spines on dorsal surface, apices with 1 pair of dorsal spurs, 1 pair of subapical ventral spurs and 2 pairs of ventral spurs. Wings short, only reaching the middle area of fifth abdominal tergite. Tegmina (Fig. 2): Radius forks into two branches near apical forth area; MA fused with R in basal forth area, then raised from R; in the left tegmen (Fig. 2A) MP and CuA free at base but fused with each other in subbasal area for about one cell length, then suddenly separated, then MP fused with MA in short distance and again separated, then MP and CuA free, undivided; while in right tegmen (Fig. 2B) MP and CuA fused in basal area, undivided. Both tegmina: Cubitus posterior undivided, free throughout; with 3 anal veins.
Abdominal tergites two and three each with two rows of stridulatory pegs (Fig. 1D). Eighth abdominal tergite prolonged downwards (Fig. 1E–F). Ninth abdominal tergite semi-globular, ventral margin with 1 pair of small spines in the middle which directing downwards and slightly outwards (Fig. 1G–H). Cerci short and slender. Subgenital plate basally broad, apical area trapezoidal projected in the middle, posterior margin with a shallowly concavity in the middle (Fig. 1I); long styli inserted at the lateral constriction (Fig. 1I).
Female. Unknown.
Coloration. General color yellow brown, face uniformly yellowish brown (Fig. 1A). Pronotum with brown margins, disc with 1 black spot at anterior and posterior margin respectively (Fig. 1B–C). Tegmina brown (Fig. 2). Ventral surface of hind femora brownish. From fifth to ninth abdominal tergites with large black spots on dorsal surfaces (Fig. 1E–F); spines of male ninth abdominal tergite brown.
Material examined. Holotype: male, Hongtan, Guilin, Guangxi, June 7, 2022, coll. by Wei Wang.
Measurements (mm). Male (holotype): BL 23.1, PL 4.1, TL 9.7, HFL 10.6.
Distribution. China (Guangxi).
Etymology. Name derived from Latin bi (two) plus macul (spot), referring to the pronotum with one black spot on anterior and posterior margins respectively.
description: Published as part of Yu, Lijiang, Liu, Hong & Bian, Xun, 2022, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) VIII: One new species of Metriogryllacris (Metriogryllacris) amitarum Group from Guangxi, pp. 93-96 in Zootaxa 5169 (1) on page 94, DOI: 10.11646/zootaxa.5169.1.9, http://zenodo.org/record/6911365