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Publications (7)      

1. Bratishko, Andriy, Werner Schwarzhans & Oleksandr Kovalchuk. 2017 Bessarabian (Tortonian, Late Miocene) fish otoliths from a transitional freshwater-brackish environment of Mykhailivka, Southern Ukraine Palaeontologia Electronica 20.3.44A: 1-13.
2. Gorobets, Leonid, Oleksandr Kovalchuk & Bogdan Ridush. 2022 One or two: how many species of the genus Pyrrhocorax (Passeriformes, Corvidae) inhabited the Crimea during the late Pleistocene? Zoodiversity 57(2): 151-170.
3. Hilton, E. J., Oleksandr Kovalchuk & Natalia Podoplelova. 2021 Sturgeons (Acipenseridae) from the Late Miocene of Ukraine, with a discussion of materials associated with Widhalm’s (1886) nomen nudum, †Acipenser euhuso Zootaxa 5057(3): 385-401.
4. Kovalchuk, Oleksandr & Carl J. Ferraris, Jr. 2016 Late Cenozoic catfishes of Southeastern Europe with inference to their taxonomy and palaeogeography Palaeontologia Electronica 19.3.34A: 1-17.
5. Kovalchuk, Oleksandr, E. Baykina, Ewa Swidnicka, K. Stefaniak & A. Nadachowski. 2020 A systematic revision of herrings (Teleostei, Clupeidae, Clupeinae) from the Oligocene and early Miocene of the Eastern Paratethys and the Carpathian Basin Journal of Vertebrate Paleontology 40(2): e1778710.
6. Kovalchuk, Oleksandr, T. Grande & M. V. H. Wilson. 2017 A review of Neogene and Quaternary pikes of southeastern Europe and a new species from the early Pleistocene of Nogaisk, Ukraine Acta Palaeontologica Polonica 62.
7. Nesin, Valentin & Oleksandr Kovalchuk. 2017 A new species of jerboa (Mammalia, Rodentia, Allactaga) from the late Miocene of Ukraine Palaeontologia Electronica 20.2.25A: 1-10.