Alternative combinations: Dicotyles protervus, Squalodon protervum, Squalodon protervus

Synonyms: Dicotyles lenis Leidy 1869, Dicotyles torquatus Cope 1867

Full reference: E. D. Cope. 1868. An addition to the vertebrate fauna of the Miocene period, with a synopsis of the extinct Cetacea of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia 19(4):138-157

Sister taxa: none

Type specimens:

• Cynorca proterva: ANSP 11543a
• Dicotyles lenis: ANSP 11543, a mandible (upper and lower canines, fragmentary left mandibular ramus, and lower m1).
• Dicotyles torquatus:

Average measurements (in mm): m1 11.6 x 8.5