Abstract
The genus Poecilimon includes 142 species divided into 18 groups. It is distributed throughout the Palaearctic area. One of the groups is the Poecilimon ornatus group, in which many closely related taxa have been identified (13 species). Although several searches have been carried out, the phylogeny and systematics of P. ornatus are only partly resolved. The most dispersed taxon within the group is Poecilimon affinis, having numerous subspecies. Species from the P. ornatus group have been described mainly based on morphological characteristics, as well as type of song. The aim of this study is to clarify the relationships between species from the P. ornatus group by comparing partial sequences of the cytochrome c oxidase subunit I (COI) mitochondrial gene. The analyses were carried out on 84 specimens from 23 taxa. Bush-crickets from the P. ornatus group are monophyletic, in contrast to taxa within the P. affinis complex. Not all of the previously described divisions of the group based on morphology, bioacoustics, distribution, and ecology were confirmed.
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