Acosmetura

Bian, Xun & Shi, Fu-Ming, 2015, New Acosmetura species (Orthoptera: Tettigoniidae: Meconematinae) from China, with notes on their distribution, Zootaxa 4040 (4), pp. 477-482 : 477-478

Key to known species of Acosmetura

1 Dorsal surface of abdomen without a longitudinal brown stripe.................................................................................. 2

- Dorsal surface of abdomen with a longitudinal brown stripe ....................................................................................... 3

2 Male cerci nearly straight, apical area with 1 lobe on ventral margin; posterior margin of female subgenital plate obtusely rounded.............................................................................................. Acosmetura emeica Liu & Zhang, 2007

- Male cerci hook-shaped, apices acute, which curved upward; posterior margin of female subgenital plate with 1 con- cavity in the middle......................................................................................... Acosmetura listrica Bian & Shi sp. nov.

3 Apices of postfemora not dark...................................................................................................................................... 4

- Apices of postfemora dark ............................................................................................................................................ 8

4 Male tenth abdominal tergite obviously projecting backward and ventrad, posterior margin with 1 U-shaped concav- ity in the middle; male cerci short and covered by tenth abdominal tergite.............. Acosmetura brevicerca Liu, 2000

- Male cerci elongate, exposed........................................................................................................................................ 5

5 Basal area of male cerci not concave ventrad............................................................................................................... 6

- Basal area of male cerci concave ventrad, flat, apices of the inner margin nearly triangular ........................................................................................................................................................... Acosmetura mabianensis Bian & Shi, 2014

6 Female subgenital plate wider than long ...................................................................................................................... 7

- Female subgenital plate longer than wide, with posterior margin concave, male unknown ........................................................................................................................................................................... Acosmetura emarginata Liu, 2000

7 Middle area of male cerci slightly broadened, apical area depressed; female subgenital plate with a longitudinal groove....................................................................................................... Acosmetura forcipata Liu, Zhou & Bi, 2008

- Subapical area of male cerci slightly broadened, apex truncate; female subgenital plate semicircular, median carina obviously raised ventrad......................................................................... Acosmetura jinyunesnis (Shi & Zheng, 1994)

8 Postfemora without brown stripe on internal and external sides................. Acosmetura nigrovittata (Liu & Bi, 1994)

- Postfemora with brown stripe on internal and external sides ....................................................................................... 9

9 Posterior margin of male tenth abdominal tergite with a small median spine; female subgenital plate nearly semicircular, basal margin trapezoidal concave, posterior margin with 1 shallow concavity in the middle....................................................................................................................................... Acosmetura nigrogeniculata (Liu & Wang, 1998)

- Posterior margin of male tenth abdominal tergite with a small median concavity, cerci longer than other species of the genus, obviously curly; baso-lateral areas of female subgenital plate with two digitate processes...................................................................................................................................... Acosmetura longicercata Liu, Zhou & Bi, 2008