A new genus and species of rodent, Lamugaulus olkhonensis, belonging to the subfamily Promylagaulinae of the family Mylagaulidae, is described on the basis of isolated teeth from the Khalagay Formation of the Lower Miocene Tagay locality (Olkhon island, Lake Baikal, Irkutsk Region). This is the first record of mylagaulids in Eastern Siberia, significantly expanding the data on the distribution of this mainly North American group of rodents in Asia and showing its presence outside the Central Asian arid zone.

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A revision of previously known material and analysis of new records of Miocene baleen whales from the Sarmatian of Adygea (city of Maikop, Blinovo Formation) resulted in the establishment of a new genus, Kurdalagonus with three species: K. mchedlidzei sp. nov. (Middle Sarmatian, Nagiezh Uashkh locality), K. adygeicus sp. nov. (Upper Sarmatian, Hydroelectric power station locality), and K. maicopicus (Spasskii, 1951) (=Cetotherium maicopicum Spasskii, 1951; Middle Sarmatian, Hydroelectric power station locality).

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