Microlarnaca zhengi Lu & Bian, 2021

Lu, Xiangyi, Bin, Wei & Bian, Xun, 2021, Contribution to the knowledge of Chinese Gryllacrididae II: Study of the genus of Microlarnaca (Orthoptera:) with description one new species from Yunnan, China, Zootaxa 5061 (2), pp. 353-360 : 354-357

publication ID	https://doi.org/ 10.11646/zootaxa.5061.2.7
publication LSID	lsid:zoobank.org:pub:3E56554E-8165-4990-9FB7-D97A4167ADF4
DOI	https://doi.org/10.5281/zenodo.5649658
persistent identifier	https://treatment.plazi.org/id/03D9D94E-FFB1-BC18-88BB-71E0FCC8EACD
treatment provided by	Plazi
scientific name	Microlarnaca zhengi Lu & Bian
status	sp. nov.

Treatment

Microlarnaca zhengi Lu & Bian View in CoL sp. nov.

Ẹ氏小Dzō

Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 , 10B View FIGURE 10

Diagnosis. The new species differs from other congeneric species in: processes of male ninth abdominal tergite with its apices directing forward ( Fig. 2I View FIGURE 2 ), processes of male tenth abdominal tergite shorter and stouter than styli ( Fig. 2G View FIGURE 2 ), its apices compressed and slighlty curved inward with apical margin truncate ( Fig. 2E View FIGURE 2 ); process of female subgenital plate stout, longer than subgenital plate ( Fig. 4E View FIGURE 4 ).

Male. Small species. Face ovoid; fastigium verticis wider as scape; face with scattered impressed spots ( Fig. 1A View FIGURE 1 ). Ocelli indistinct.

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 interno-apical spine. Hind femora with 2 – 3 internal and 4 – 6 external spines on ventral surface; dorsal surface of tibiae with 4 – 6 internal and 6 external 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 ( Fig. 3A–B View FIGURE 3 ). Tegmina: Radius with two branches, both forked near tip. Media anterior of left tegmen unbranched leaning on radius in basal area ( Fig. 3C View FIGURE 3 ). On the right tegmen ( Fig. 3D View FIGURE 3 ), media anterior fused in basal area with radius, then receives a short, oblique connection branch from radius behind middle of tegmen thus that MA and RS become fused for a short distance and divided again in apical third. Both tegmina: media posterior absent; cubitus anterior forks before mid-length of tegmina into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 4 anal veins.

Second and third abdominal tergites with two rows of parallel stridulatory pegs separately ( Fig. 1D View FIGURE 1 ). Eighth abdominal tergite prolonged ( Fig. 1F View FIGURE 1 ). Apical area of ninth abdominal tergite projecting posteriorly ( Fig. 1F View FIGURE 1 ), with one process at each side pointing ventrad and forward ( Fig. 2G–I View FIGURE 2 ); basal area of the process stout, terminating to apex, apical area contorted as Fig. 2I View FIGURE 2 . Middle area of tenth abdominal tergite with a pair of swellings ( Fig. 2G View FIGURE 2 ), upper margins these swellings with a pair of short, cylindrical processes ( Fig. 2G–I View FIGURE 2 ); the apical area of processes connected each other ( Fig. 2G–I View FIGURE 2 ), apices compressed with truncate margin ( Fig. 2E, G View FIGURE 2 ). Subgenital plate trapezoidal, apical area projected with a shallowly median concavity on posterior margin ( Fig. 2F View FIGURE 2 ). Styli inserted at latero-apical angles of subgenital plate ( Fig. 2F View FIGURE 2 ).

Female. Tegmina just reaching the apex of abdomen ( Fig. 5A–B View FIGURE 5 ). Tegmina ( Fig. 5C–D View FIGURE 5 ): Radius releases RS in subapical area; media leaning on radius in basal area but does not fuse with it; cubitus anterior forks behind midlength of right tegmen into two veins, CuA1 and CuA2, while the media on left tegmen remains single-branched; cubitus posterior undivided, free throughout; with 4 anal veins. Between posterior margin of seventh abdominal sternite and basal area of subgenital plate with one conical process ( Fig. 4E View FIGURE 4 ), which surpassing the posterior margin of subgenital plate and covered the largely area of subgenital plate, ventral surface of the process with sclerotised transverse folds ( Fig. 4E View FIGURE 4 ). Subgenital plate about 3.3 times as wide as long, the lateral margins convex ( Fig. 4E View FIGURE 4 ). Ovipositor short, apical half moderately uncurved; with gradually approaching margins, apices obtuse ( Fig. 4F View FIGURE 4 ).

Measurements (mm). body: ♂ 13.1, ♀ 13.6; pronotum: ♂ 4.2, ♀ 3.9; tegmen: ♂ 12.8, ♀ 11.4; hind femur: ♂ 7.7, ♀ 7.8; ovipositor: 7.7.

Coloration. Body yellowish brown. Eyes black. Tegmina semi-transparent yellowish brown. Dorsal surface purplish red.

Material examined. Holotype: male, Huazhuping, Funing, Yunnan, 23 July, 2021, coll. by Wei Bin, Xiaoyu Peng & Xun Bian . Paratye: 1 female, other information as holotype.

Etymology. The new species is named in honor of Professor Zhemin Zhen (Ẹ哲民) for his great contibutions to the classification of Chinese locusts and grasshoppers.