The present study examines the phylogeography of Pholidopterini (Orthoptera, Tettigoniidae), a lineage distributed in the East Mediterranean and estimated substitution rates for the three mitochondrial and two nuclear gene segments. The last common ancestor of Pholidopterini was dated to 18 myr ago, in Early Miocene. Phylogeography of the lineage was marked with three waves of radiations, first during the Middle Miocene Climatic Optimum, the second during the Serravallian, and third during the ending of Messinian. The substitution rate estimations were 0.0187/0.018/0.0141/0.0010207 s/s/myr for COI/ND2/12S-tRNAval-6S/ITS1-5.8S rRNA-ITS2. The following main conclusions were drawn; (i) Radiation of Pholidopterini directed by the climatic shifts, (ii) signs of vicariant speciation were poor, contrary to the active tectonic history, (iii) the ultimate generic ancestors were dated to the Langhian and Serravallian, and (vi) the Tortonian transgression of Mid-Aegean Trench appears to be a reliable geographic calibration point for lineage splitting between Crete and Anatolia.
We report the complete mitochondrial genome of the Cretan bush cricket Poecilimon cretensis. The mitogenome consists of 13 protein-coding regions, 22 tRNAs, two rRNAs, and one control region. The length of mitogenome in P. cretensis varies between15477 and 15631 bp, mainly due to variability in control region. The start and stop codons of protein coding genes exhibit the general pattern in Phaneropterinae. Phylogenetic tree constructed with the mitogenome obtained during this study and 12 mitogenomes of Phaneropterinae downloaded from GenBank, placed P. cretensis in Barbitistini as sister group to Poecilimon luschani. Data indicate that the gene overlapping pattern exhibit strong phylogenetic signals.
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