Roeseliana, Zeuner

Lemonnier-Darcemont, Michèle & Darcemont, Christian, 2023, New data on the distribution of the genus Roeseliana Zeuner, 1941 (Orthoptera, Tettigoniidae, Tettigoniinae) in the southwestern Balkans, with description of R. epirotica n. sp., Zoosystema 45 (14), pp. 445-450 : 449

KEY TO SPECIES OF ROESELIANA ZEUNER, 1941 IN THE SOUTHWESTERN BALKANS

Females

1. Sternum 6 and 7 with bumps ................................................................................. R. bispina ( Bolivar, 1899)

— Sternum 6 and 7 not modified .................................................................................................................... 2

2. Subgenital plate trapezoidal in shape, wider than high, the lobes truncated horizontally. Narrow and shallow excision between the two lobes ............................................................................................ R. epirotica n. sp.

— Subgenital plate widened with lobes slightly pointed. Deep and large excision of the subgenital plate ......... 3

3. Lobes of subgenital plates almost triangular in shape. Excision of the subgenital plate reaching beyond the middle .............................................................................................................. R. roeselii (Hagenbach, 1822)

— Lobes more rounded on external part. Excision of the subgenital plate reaching at most to the middle .......... ............................................................................................................................ R. ambitiosa ( Uvarov, 1924)

Males

1. Last tergite indented over a narrow width. Internal tooth of cerci longer than width of cercus at the point of insertion of the tooth. Tooth bent forward ...................................................................................... R. roeselii

— Last tergite indented over a large width. Internal tooth of cerci as most as long as the width of cercus at the point of insertion of the tooth. Tooth not bent, more rounded .................................................................... 2

2. Titillators slightly curved ............................................................................................................. R. ambitiosa

— Titillators strongly curved with the apex in the shape of a beak ................................................................... 3

3. A very few number of spines, only located on the apex of the titillators ............................... R. epirotica n. sp.

— A larger number of spines on the titillators, from the base to the apex ............................................ R. bispina