English: Comparison of the prehistoric monodontid Denebola brachycephala (top) and the pygmy sperm whale, Praekogia cedrosensis, from the Late Miocene of Baja California
Date 3 April 2012
Denebola brachycephala is an extinct whale belonging to the family Monodontidae. It is the earliest known ancestor of the beluga, Delphinapterus leucas, and dates from the Upper Miocene period. A fossil was found in the Baja California peninsula, indicating that the family once existed in warmer waters. Order: Artiodactyla, Infraorder: Cetacea, Family: Monodontidae, Subfamily: Delphinapterinae, Genus: Denebola, Species: Denebola brachycephala Barnes, 1984.