A taxonomic outline of the complex (Orthoptera) using the geometric morphometric approach.

The genus contains 145 species, widely distributed in the Palaearctic, among which the group has the greatest diversity in the Balkans. Despite several revisions of the genus, the systematics of the species group, and in particular, of the taxa associated with the species , is still unsolved. Due to morphological similarity, with its subspecies, and form the complex. The aim of this study is to test the hypotheses of an outlined species complex, namely the complex, within the group using morphological data. Geometric analysis was conducted to explore variation in the structure of the male tegmen, ovipositor, male cercus, and male pronotum. The number of teeth and stridulatory file measurements provided additional information on morphological variation within the complex. A phylogenetic tree based on the cytochrome c oxidase subunit I gene (COI) was used for comparison with the morphological data. Canonical variate analysis showed that male tegmen and male cercus are good morphostructures to distinguish the taxa belonging to the complex from other species in the group. This may confirm our assumption for the designation of the complex. The results of the principal component analysis of stridulatory file measurements, molecular data, and CVA of the ovipositor suggest adding two additional species to the complex: and .