Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914)

Liu, Jing, Bin, Wei & Bian, Xun, 2021, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera) III: New additions of Metriogryllacris Karny, 1937, Zootaxa 5068 (1), pp. 142-148 : 144-145

Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914) 佩•·蟋•

Additional description. Wings reaching the middle area of seventh abdominal tergite or little the basal area of eighth abdominal tergite ( Fig. 4A–B ). Tegmina ( Fig. 4C–D , 7 ): Radius gives rise to RS in about apical third, RS forked near tip or not. Media anterior free from base, receives a short branch from CuA about basal third of tegmen and then divides into MA and MP+CuA1; the posterior branch CuA2 does not further divide; cubitus posterior undivided, free throughout; with 4 anal veins, the last two with common base and fourth vein very short.

Material examined. 1 female, Mao'ershan, Xing'an , Guangxi, August 3, 2020, coll. by Dongdong Yang ; 3 females, Maoershan, Xing'an , Guangxi, August 17, 2020, coll. by Dongdong Yang ; 1 male, Mao'ershan, Xing'an , Guangxi, August 18, 2020, coll. by Dongdong Yang ; 1 female, Damingshan, Shanglin , Guangxi, July 17, 2021, coll. by Jing Liu ; 1 male and 2 females, Damingshan, Shanglin , Guangxi, August 21, 2021, coll. by Jing Liu ; 1 male, Yangmei'ao, Rongshui , Guangxi, September 4, 2021, coll. by Jing Liu .

Discussion. The Metriogryllacris (Metriogryllacris) permodesta species group is widely distributed in South of China and these species can be divided into three or four species according to the size, shape and curved or not of processes of male ninth abdominal tergite, the posterior margin of male subgenital plate with median concavity or not, and the shape of lobe of female seventh abdominal sternite. When the shape of processes of male ninth abdominal tergite is remarkably similar to among species, the lobe of female seventh abdominal sternite on ventral surface can be used as diagnostic character. The shape of process of female seventh abdominal sternite examined by us in this paper ( Fig. 6F ) is very similar to that of the female from Guangdong (Kwangtung) identified by Karny and illustrated by Ingrisch (2018). Meanwhile, the shape of the process of the female seventh abdominal sternite from Hainan Island differs from that of specimens from Guangdong and Guangxi. The male subgenital plate from Zhejiang (Chekiang) has roundly projecting posterior margin, while the specimens from Guangdong (Kwangtung) and Guangxi have a shallowly concavity ( Fig. 3G , 5F ). To correct identify these specimens, further study should be conducted based on the molecular data.

Figures

FIGURE 3. Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914). Male (from Damingshan, Guangxi): 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. dorsal view, G. ventral view, H. apico-ventral view; I. processes of ninth abdominal tergite in lateral view.

FIGURE 4. Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914). Male (from Damingshan, Guangxi): A–B. habitus in lateral view; C–D. tegmina in dorsal view: C. left tegmen, D. right tegmen.

FIGURE 5. Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914). Male (from Mao'ershan, Guangxi): A–B. head and pronotum: A. dorsal view, B. lateral view; C. second and third abdominal tergites in lateral view; D–F. apex of abdomen: D. lateral view, E. dorsal view, F. ventral view.

FIGURE 6. Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914). Female: 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. apex of abdomen in lateral view; F. seventh abdominal sternite and subgenital plate in ventral view.

FIGURE 7. Metriogryllacris (Metriogryllacris) permodesta (Griffini, 1914) Female: A–B. tegmina in dorsal view: A. left tegmen, B. right tegmen.