Evolutionary Patterns among Living and Fossil Kogiid Sperm Whales: Evidence from the Neogene of Central America
Aprixokogia kelloggi (USNM 187015), 11A, Scaphokogia cochlearis (MNHN PPI 229), 11B, Praekogia cedrosensis (UCMP 315229), 11C, Nanokogia isthmia gen. et sp. nov. (based on UF 280000 and 273554), 11D, Kogia sima (LACM 47142), 11E, and, K. breviceps (LACM 95745), 11F. Each bone is color-coded for ease of comparison. Red dashed lines denote the extent of the supracranial/premaxillary fossa. Areas in white are not preserved and have been reconstructed with plaster on the specimens. Illustration of S. cochlearis modified from Muizon ; all other illustrations based on the specimens listed.