FIGURE 1. Locality map of Dubrovino site and similar-age late Pleistocene deposits from the West Siberian Plain. 1, Dubrovino; 2, Tyurseda-Khadyta; 3, Kul’egan-2247; 4, Bun’kovo; 5, Kalistratikha; 6, Novaya Surtaika.

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FIGURE 2. Stratigraphic diagram of the Dubrovino section on the Ob River.

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FIGURE 3. Subfossil beetle fragments from the Dubrovino assemblage; pronotum (1-4, 6, 10-12), head (5), and elytron (7-9, 13-15). 1, Elaphrus cf. riparius (Linnaeus, 1758); 2, Pogonus punctulatus Dejean, 1828; 3, Pterostichus cf. brevicornis (Kirby, 1837); 4, Cymindis cf. arctica Kryzhanovskij et Emetz, 1979; 5, Aphodius multiplex Reitter, 1867; 6, Cymbiodyta marginella (Fabricius, 1792); 7, Trechus cf. compactulus Belousov et Kabak, 1996; 8, Bembidion dauricum (Motschulsky, 1844); 9, Olisthopus sturmii (Duftschmid, 1812); 10, Pterostichus macer (Marsham, 1802); 11, P. mirus (Tschitschérine, 1894); 12, Amara aurichalcea Germar, 1823; 13, Porcinolus murinus (Fabricius, 1794); 14, Morychus ostasiaticus Tshernyshev, 1997; 15, Poecilus cf. ravus (Lutshnik, 1922). Scale bars are 1 mm increments. Figure parts 1-9 and 10-15 correspond to upper and the bottom scale bars, respectively.

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FIGURE 4. Subfossil beetle fragments from the Dubrovino assemblage; elytra (1-2, 7, 11, 13, 17), pronotum (3-4, 6, 8, 15), head (5, 9, 14, 16), and rostrum (10, 12). 1, Otiorhynchus altaicus Stierlin, 1861; 2-3, O. obscurus Gyllenhal in Schoenherr, 1834; 4, O. pullus Gyllenhal in Schoenherr, 1834; 5-6, O. politus Gyllenhal in Schoenherr, 1834; 7, O. beatus Faust, 1890; 8, Stephanocleonus eruditus Faust, 1890; 9, S. isochromus Suvorov, 1912; 10, S. favens Faust, 1884; 11, Pissodes insignatus Boheman in Schoenherr, 1843; 12, Trichalophus biguttatus (Gebler, 1832); 13, Tychius albolineatus Motschulsky, 1860; 14, Phyllobius femoralis Boheman in Schoenherr, 1842; 15, Metadonus distinguendus (Boheman in Schoenherr, 1842); 16, Notaris aethiops (Paykull, 1792); 17, Tournotaris bimaculata (Fabricius, 1787). Scale bars are 1 mm increments.

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FIGURE 5. Late Pleistocene and modern ranges of Stephanocleonus favens Faust, 1884.

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FIGURE 6. Late Pleistocene and modern ranges of Stephanocleonus isochromus Suvorov, 1912.

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FIGURE 7. Late Pleistocene and modern ranges of Otiorhynchus janovskii Korotyaev, 1990.

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