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Taxonomy
Otradnocetus was named by Mchedlidze (1984).
It was assigned to Balaenopteroidea by Hampe and Baszio (2010); to Cetotheriidae by Mchedlidze (1984), Pilleri (1986), McKenna and Bell (1997), Goldin and Startsev (2014), Berta (2017); and to Cetotherioidea by Gol'din and Steeman (2015), Gol'din (2018).
It was assigned to Balaenopteroidea by Hampe and Baszio (2010); to Cetotheriidae by Mchedlidze (1984), Pilleri (1986), McKenna and Bell (1997), Goldin and Startsev (2014), Berta (2017); and to Cetotherioidea by Gol'din and Steeman (2015), Gol'din (2018).
Species