Expansion, speciation and a change of trophic niche: a case study of the Early Pleistocene ground squirrels Spermophilus polonicus and S. praecox

References

• Black CC. 1963. A review of the North American tertiary sciuridae. Bull Mus Comp Zool. 130:109–248.
   Google Scholar
• Black CC, Kowalski K. 1974. The Pliocene and Pleistocene Sciuridae (Mammalia, Rodentia) from Poland. Acta Zool Cracov. 19:461–486.
   Google Scholar
• Butler PM. 1973. Molar wear facets of early tertiary North American primates. In: Symposia of the 4th International Congress of Primatology; Craniofacial Biology of Primates; Aug 1972; Portland, OR: Karger, Basel. Vol. 3, p. 1–27.
   Google Scholar
• Ellerman JR, Morrison-Scott TCS. 1951. Checklist of Palaearctic and Indian Mammals 1758 – 1946. London: British Museum (Natural History).
   Google Scholar
• Fortelius M, Solounias N. 2000. Functional characterization of ungulate molars using the abrasion-attrition wear gradient: a new method for reconstructing paleodiets. Am Mus Novit. 3301:1–36.
   Google Scholar
• Garapich A, Nadachowski A. 1996. A contribution to the origin of Allophaiomys (Arvicolidae, Rodentia) in Central Europe: the relationship between Mimomys and Allophaiomys from Kamyk (Poland). Acta Zool Cracov. 39(1):179–184.
   Google Scholar
• Gromov IM, Bibikov DI, Kalabukhov NI, Meier MN. 1965. [Ground squirrels (Marmotinae)]. In: Fauna of the USSR. Mammals; Nauka: Moscow–Leningrad. Vol. 3 (2). (in Russian).
   Google Scholar
• Hammer Ø, Harper DA, Ryan PD 2008. PAST—PAlaeontological STatistics, ver. 1.81. Software documentation.
   Google Scholar
• Helgen KM, Cole RF, Helgen LE, Wilson DE. 2009. Generic revision in the Holarctic Ground Squirrel genus Spermophilus. J Mammal. 90(2):270–305.
   Web of Science ®Google Scholar
• Kaiser TM, Fortelius M. 2003. Differential mesowear in occluding upper and lower molars: opening mesowear analysis for lower molars and premolars in hypsodont horses. J Morphol. 258:67–83.
   PubMed Web of Science ®Google Scholar
• Kaiser TM, Müller DW, Fortelius M, Schulz E, Codron D, Clauss M. 2013. Hypsodonty and tooth facet development in relation to diet and habitat in herbivorous ungulates: implications for understanding tooth wear. Mammal Rev. 43(1):34–46.
   Web of Science ®Google Scholar
• Kapustina SY, Brandler OV, Adiya Y. 2015. Phylogeny of genus Spermophilus and position of Alashan ground squirrel (Spermophilus alashanicus, Büchner, 1888) on phylogenetic tree of Paleartic short-tailed ground squirrels. Mol Biol. 49(3):391–396.
   Web of Science ®Google Scholar
• Kazantseva NE, Tesakov AS. 1998. Evolution of Plio-Pleistocene voles with the special referrence to demographic features of fossil assamblage. Mededelingen Ned Instituut Voor Toegepaste Geowetenschappen TNO. 60:555–564.
   Google Scholar
• Klevezal GA. 2007. Principles and methods of age determination of mammals. Moskow: KMK Scientific Press. (in Russian).
   Google Scholar
• Krokhmal’ AI, Rekovets LI. 2010. Fossil sites of micromammals of the Pleistocene of Ukraine and adjoining territories. Kiev: LAT & K Press. (in Russian).
   Google Scholar
• Kryštufek B, Vohralík V. 2013. Taxonomic revision of the Palaearctic rodents (Rodentia). Part 2. Sciuridae: urocitellus, Marmota and Sciurotamias. Lynx. 44:27–138.
   Google Scholar
• Maul LC, Markova AK. 2007. Similarity and regional differences in Quaternary arvicolid evolution in Central and Eastern Europe. Quat Int. 160:81–99.
   Web of Science ®Google Scholar
• Mossoczy Z. 1959. Odkrycie miejsc występowania kości kręgowców kopalnych w okolicach Kłobucka. Przegl Geol. 3:132–134. (in Polish).
   Google Scholar
• Nadachowski A. 1990. Lower Pleistocene rodents of Poland: faunal succession and biostratigraphy. Quartärpaläontologie. 8:215–223.
   Google Scholar
• Nadachowski A. 1998. Faunal succession of small mammal assemblages at the Pliocene-Pleistocene boundary in Poland. Mededelingen Ned Instituut Voor Toegepaste Geowetenschappen TNO. 60:281–286.
   Google Scholar
• Pogodina NV. 2006. Ground squirrels (Sciuridae, Rodentia) from Late Pleistocene Middle and Southern Transurals. Bull Moscow Soc Naturalists Biol Ser. 111(5):4–17. in Russian.
   Google Scholar
• Popov VV. 2017. Early Pleistocene small mammals (Eulipothyphla, Chiroptera, Lagomorpha and Rodentia) from Futjova Cave, North Bulgaria. Acta Zool Bulgarica. 69(2):263–282.
   Web of Science ®Google Scholar
• Popova L, Nadachowski A. 2018. Early Pleistocene ground squirrels from localities Kamyk (Poland) and Tiligul (Ukraine). In: Recent problems of Ukrainian geology: Proceedings of the conference in memoryes of V. Makridin (Kharkiv, 26–27 of April, 2018). p. 34–38. (In Ukrainian).
   Google Scholar
• Popova LV. 2013. Occlusive morphology as evidence of environmental conditions: lower pleistocene Spermophilus severskensis (Sciuriadae, Rodentia), Northern Ukraine. In: Palaeolandscapes from Saalian to Weichselian. South Eastern Lithuania: Abstracts: International Field Symposium; p. 80–81.
   Google Scholar
• Popova LV. 2016a. Evolutionary lineage of Spermophilus superciliosus - S. fulvus (Rodentia, Sciuridae) in the Quaternary of the Dnieper area: an ability of a biostratigraphical implication. Quarter Int. 420:319–328.
   Web of Science ®Google Scholar
• Popova LV. 2016b. Occlusal pattern of cheek teeth in extant Spermophilus: A new approach to the identification of species. J Morphol. 277:814–825.
   PubMed Web of Science ®Google Scholar
• Popova LV, Maul LC, Zagorodniuk IV, Veklych Y, Shydlovskiy PS, Pogodina NV, Bondar KM, Strukova TV, Parfitt SA. 2019. ‘Good fences make good neighbours’: concepts and records of range dynamics in ground squirrels and geographical barriers in the Pleistocene of the Circum-Black Sea area. Quarter Int. 509:103–120.
   Web of Science ®Google Scholar
• Rekovets L, Nadachowski A. 1995. Pleistocene voles (Arvicolidae) of the Ukraine. Paleontologia Evol. 28–29:145–245.
   Google Scholar
• Rekovets LI. 1994. Small mammals of the Antropogene of the South of the Eastern Europe. Kiev: Naukova dumka. (in Russian).
   Google Scholar
• Reumer J, van den Hoek Ostende LW. 2003. Petauristidae and Sciuridae (Mammalia, Rodentia) from Tegelen, Zuurland, and the Maasvlakte (the Netherlands). Deinsea. 10(1):455–468.
   Google Scholar
• Schmidt-Kittler N. 2002. Feeding specializations in rodents. Senckenbergiana Lethaea. 82(1):141–152.
   Google Scholar
• Schultz JA, Menz U, Winkler DE, Schulz-Kornas E, Engels S, Kalthoff DC, Südekum KH. 2018. Modular Wear Facet Nomenclature for mammalian post-canine dentitions. Hist Biol. 30(1–2):30–41.
   Web of Science ®Google Scholar
• Sinitsa MV, Pogodina NV. 2019. The evolution of early spermophilus in eastern Europe and the antiquity of the Old World ground squirrels. Acta Palaeontologica Polonica. 64(3):643–667.
   Web of Science ®Google Scholar
• Sinitsa MV, Pogodina NV, Кryuchkova LY. 2019. The skull of Spermophilus nogaici (Rodentia: Sciuridae: Xerinae) and the affinities of the earliest Old World ground squirrels. Zool J Linn Soc. 186(3):826–864.
   PubMed Web of Science ®Google Scholar
• Stadnyk OI, Dema LP. 2007. The Ground squirrels (Spermophilus, Rodentia) of the Late Pliocene of Ukraine. In: Gozhik PF, editor. Paleontological studies in Ukraine: history, present-day state and prospects: collection of Scientific work of IGS NAS of Ukraine, Kyiv. p. 361–364. (in Ukrainian).
   Google Scholar
• Starobogatov YI, Tolstikova NV. 1986. Mollusks. In: Kvasov DD, Davydova NN, Rumiantseva VA, editors. History of Lakes of the USSR Leningrad. Nauka Press. p. 156–165. (in Russian).
   Google Scholar
• Tesakov AS. 2004. Biostratigrafiya srednego pliotsena - eoplejstotsena vostochnoj Evropy (po melkim mlekopitayushchim) [Biostratigraphy of Middle Pliocene - Eopleistocene of Eastern Europe (based on small mammals)]. Moskva: Nauka.
   Google Scholar
• Tesakov AS, Titov VV, Bondarev AN, Simakova AA, Sotnikova MV, Frolov PD, Sinitsa MV, Domogatskaya KV. 2015. Biozonation of continental early Pleistocene of Eastern Europe and Western Asia: development and specification. In: Fundamental problems of Quaternary, results and main trends of future Proceeding of the IX all-Russian conference on Quaternary Research; Sep 15–20; Irkutsk. p. 461–463. (in Russian).
   Google Scholar
• Topachevsky VA, Skorik AF. 1977. Rodents of the early Tamanian fauna of the Tiligul section. Kyiv: Naukova Dumka. (in Russian).
   Google Scholar
• Topachevsky VO. 1957. New species of souslik from the Upper Pleistocene deposits of Azov region, Ukraine. Proceedings of the Academy of Sciences of USSR;Vol. 2. p. 204–208. (in Ukrainian).
   Google Scholar
• Ulbricht A, Maul LC, Schulz E. 2015. Can mesowear analysis be applied to small mammals? A pilot-study on leporines and murines. Mamm Biol. 80(1):14–20.
   Web of Science ®Google Scholar