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A new subspecies of C. (Eucarabus) obsoletus Sturm 1815 (Coleoptera: Carabidae: Carabini) in Romania

Abstract : C. (Eucarabus) obsoletus Sturm is a widespread species in Romania with a broad infra- specific diversification (8 subspecies mentioned). The morphological identification is difficult, constraining, requiring to observe a large number of insects with a result often random due to the insufficiency of criteria. The use of molecular biology with mitochondrial markers (COI I/cyt b concatenation), identified the genetic structure and the use of genetic distance (Matrix K2P Kimura) ensures classification and separation between groups. The study applied successively this technique to the subspecies described, to the Czech and Slovak provenances, considered close to the type described by Sturm and to the 66 populations in Romania.The results with the subspecies described, collected from the localities indicated by their descriptor confirm the originality of uhligi/csiki (Rodna) fossulifer/carpathicus/nagyagensis but put in synonymy nagyagensis with paranagyagensis- tippmani-prunneri. The population of Moravia has the same genetic structure as csiki from Rodna Mountains, having a maternal origin no doubt neighbouring.The genetic analysis of the provenances of the territorial collection reports certain populations to the subspecies identified and reveals 5 additional groups: obsoletus csiki with 3 components (group obsoletus csiki (Rodnei Mountains) close to the type of Sturm, csiki NW (Lunca la Tisa) close to uhligi, csiki Lotrului Mt., Voineasa); group obsoletus Cozia, close to the previous ones and with a wide geographical distribution; obsoletus Parâng (and Poiana Rusca) are very different from all other groups with a genetic distance of 4.7 to 6.9% which constitutes a new subspecies.Obsoletus Parâng is a subspecies of alpine zone (type Parang Mountains 1000-2100 m) of small size (males L/l = 20.7/8.5 mm, females L/l = 21.5/9.1 mm) with the dominant two-coloured exemplars (pronotum brown red and elytra yellowish green or brownish, 18% melanizing at altitude). Morphologically, it belongs to groups of obsoletus at salient intervals, subequal with an entire interval after the third primary. The species has a very high infra-specific variability with genetic divergence rates between 3.0 and 5.6%. In conclusion, for a species with intraspecific variability that is morphologically difficult to establish, the use of molecular biology (mitochondrial
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Frédérique Hubler, Jean Barloy, Prunar Florin, Silvia Prunar. A new subspecies of C. (Eucarabus) obsoletus Sturm 1815 (Coleoptera: Carabidae: Carabini) in Romania. INTERNATIONAL CONFERENCE ON LIFE SCIENCE, May 2018, Timisoara, Romania. ⟨hal-02382799⟩

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