Fossil specimens of this species occur from the late-Paleocene to late-Eocene. [details]
Fossil specimens of this species occur in the Oligocene. [details]
Fossil specimens of this species occur in the mid-Eocene and Oligocene. [details]
Fossil specimens of this species occur in the mid-Eocene and the Oligocene. [details]
This fossil species was originally described as "Crania quadrangularis Tate, 1893", but as this species name was ... [details]