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Did Cold Resistance Influence the Success of the Halobiont Darkling Beetle Centorus rufipes (Coleoptera, Tenebrionidae) During the Pleistocene?

Roman Yu. DudkoInstitute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630091, RussiaAnna A. GurinaInstitute of Biology, Ecology and Natural Resources, Kemerovo State University, Kemerovo 650000, RussiaA. V. AlfimovInstitute of Biological Problems of the North, Far Eastern Branch of the Russian Academy of Sciences, Magadan 685000, RussiaNatalia I. AgrikolyanskayaInstitute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630091, RussiaI. I. LyubechanskiiDepartment of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, RussiaE. N. MeshcheryakovaInstitute of Biological Problems of the North, Far Eastern Branch of the Russian Academy of Sciences, Magadan 685000, RussiaSergei V. ReshetnikovInstitute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630091, RussiaAndrei A. LegalovBiology Department, Samarkand State Pedagogical Institute, Samarkand 140102, UzbekistanД. И. БерманInstitute of Biological Problems of the North, Far Eastern Branch of the Russian Academy of Sciences, Magadan 685000, Russia

Insectsjournal2026en

ABI

Annotatsiya

Centorus rufipes (Gebler, 1833) is the only tenebrionid beetle commonly found in late Pleistocene deposits of southern western Siberia. It is assumed that the reasons for its success during the Last Glacial Maximum could have been its cold resistance and/or the relatively mild conditions of its habitat, the shores of salt lakes. The cold resistance parameters of C. rufipes and their overwintering conditions were studied near Kusgan Lake (Novosibirsk Oblast, Russia). Adults and larvae of this species used a supercooling mechanism to protect themselves from sub-zero temperatures and did not tolerate freezing, just like other steppe species of Tenebrionidae. The supercooling point (SCP) for most of the individuals was around −31 °C. Measurements of low lethal temperatures (LLT) showed that 50% of individuals died after 2 days of exposure to −27 °C. The measured SCP and LLT were at least 5 °C lower than darkling beetle species from the Chuya Depression of the Altai, which is known for its extreme winter temperatures. Thus, the hypothesis of increased cold resistance of C. rufipes was confirmed. No warming effect of its salt lakeside habitats was detected.

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Mavzular

Physiological and biochemical adaptations Animal Ecology and Behavior Studies Coleoptera Taxonomy and Distribution

Identifikatorlar

DOI: 10.3390/insects17020204

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