Eugryllacris hainanensis Bin & Bian, 2021

Bin, Wei & Bian, Xun, 2021, New descriptions of Eugryllacris (Orthoptera: Gryllacrididae: Gryllacridinae) from China, Zootaxa 5048 (2), pp. 279-288 : 283-284

publication ID	https://doi.org/ 10.11646/zootaxa.5048.2.8
publication LSID	lsid:zoobank.org:pub:594B7B99-984A-4493-8DDE-CEAF7071543F
DOI	https://doi.org/10.5281/zenodo.5555349
persistent identifier	https://treatment.plazi.org/id/A43487FD-0564-3147-7DF8-ADD696FFBE0F
treatment provided by	Plazi
scientific name	Eugryllacris hainanensis Bin & Bian
status	sp. nov.

Treatment

Eugryllacris hainanensis Bin & Bian View in CoL sp. nov.

·南×蟋•

Figrues 3–6, 9A–E

Diagnosis. The new species differs from other congeneric species in: median ocellus with white margins and green central area ( Figs. 3A View FIGURE 3 , 4A View FIGURE 4 ); the spines of male ninth abdominal tergite widely separate ( Fig. 3I–L View FIGURE 3 ); posterior margin of female seventh sternite with bilobate projections ( Fig. 4I View FIGURE 4 ); posterior margin of female subgenital plate without median concavity ( Fig. 4I View FIGURE 4 ).

Male. Medium species. Face ovoid; fastigium verticis about 1.9 time as wide as scape; fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 3A View FIGURE 3 ). Ocelli distinct.

Fore coxae with 1 small spine; fore and middle femora unarmed, tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; dorsal surface of middle tibiae with 1 internal spine. Hind femora with 5 – 6 internal and 9 external spines on ventral surface; dorsal surface of tibiae with 6 – 7 pairs of spines and 1 pair of apical spurs, vetral surface with 1 pair of subapical spurs and 2 pairs of apical spurs.

Wings slightly surpassing the apex of abdomen, reaching the middle area of hind tibiae ( Fig. 9A–B View FIGURE 9 ). Left tegmen ( Fig. 4A–B View FIGURE 4 ): Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior absent; cubitus anterior forks before mid-length of tegmen into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 5 anal veins. Right tegmen ( Fig. 4C–D View FIGURE 4 ): Radius with two branches, both forked near tip; media anterior fused in basal area with radius, then forks into two veins, MA and MP; cubitus anteiror and cubitus posterior undivided, free throughout; with 5 anal veins.

Second and third abdominal tergites with few, very minute stridulatory pegs ( Fig. 3F View FIGURE 3 ). Eighth abdominal tergite prolonged ( Fig. 3G View FIGURE 3 ). Ninth abdominal tergite semi-globular curved downward; the descending posterior area with a pair of swellings separated by a shallow furrow in midline, below that swelling with a small spine on both sides ( Fig. 3I–L View FIGURE 3 ). Subgenital plate almost twice as wide as long; poterior margin slightly obtuse-triangularly concave ( Fig. 3I View FIGURE 3 ). Styli inserted laterally at posterior margin of subgenital plate ( Fig. 3I View FIGURE 3 ).

Female. Seventh abdominal sternite prolonged, posterior margin bilobate, between the lobes with one shallowly concavity ( Fig. 5H, I View FIGURE 5 ). Subgenital plate elongate triangular with rounded apex ( Fig. 5I View FIGURE 5 ). Ovipositor obviously upcurved, margins slightly and gradually narrowing towards apices; dorsal margin of subapices slightly expanded ( Fig. 5F View FIGURE 5 ).

Measurements (mm). Body w/wings: ♂ 40.5–41.9, ♀ 37.9–40.3; body w/o wings: ♂ 32.4–36.7, ♀ 33.7–36.6; pronotum: ♂ 7.6–8.1, ♀ 7.4–8.3; tegmen: ♂ 29.9–31.0, ♀ 27.7–29.0; hind femur: ♂ 17.1–18.7, ♀ 16.9–17.5; ovipositor: 15.1–15.4.

Coloration. Body green. The margins of ocelli white ( Figs. 3A View FIGURE 3 , 5A View FIGURE 5 ). Tegmina semi-transparent yellowish brown with green veins ( Figs. 4 View FIGURE 4 , 6 View FIGURE 6 ).

Material examined. Holotype: male, Jianfengling, Ledong, Hainan, 25 August , 2021, coll. by Yue Zha. Paratyes: 1 males and 2 females, other information as holotype.

Etymology. Named after the type locality.