| Waipatia, Prosqualodon, Cetotheriopsis, Squalodontidae, Macrodelphinus|
Microcetus is a genus of extinct odontocete from the late Oligocene (Chattian) of Nordrhein-Westfalen, Germany.
The type species of Microcetus, M. ambiguus, was originally described as a new species of Phoca on the basis of teeth from late Oligocene deposits in northwestern Germany. The odontocete nature of the teeth was eventually recognized, and it was eventually assigned to Squalodon, before being made the type species of a new genus, Microcetus.Microcetus hectori Benham, 1935 = Waipatia hectori
Microcetus sharkovi Dubrovo and Sharkov, 1971 = likely a distinct genus, but affinities uncertain