[1][2] Coronodon falls basally within Mysticeti, being closely related to the unnamed taxon ChM PV 5720 and more primitive than "Metasqualodon" symmetricus, Aetiocetidae, Mammalodontidae and Llanocetus.

This sort of dentition is common in basilosaurid whales, who fed utilizing exclusively pursuit predation.

[1] This is unlike the molar teeth of basilosaurids, which possess wear patterns indicative of shearing flesh at the back of the mouth.

Additionally, the rostrum has very loose sutures, which would have allowed Coronodon to expand the size of its oral cavity in a manner similar to extant mysticetes.

Many primitive odontocetes, such as Ankylorhiza, Xenorophus, and Albertocetus have been found in both formations in Oligocene aged deposits.