It was recombined as Cynodictis latidens by Scott (1898); it was recombined as Nothocyon latidens by Matthew (1899), Merriam (1906), Matthew (1907), Peterson (1907), Thorpe (1922), Hall and Martin (1930), Macdonald (1963) and Macdonald (1970); it was recombined as Cormocyon latidens by Wang and Fremd (1994); it was recombined as Phlaocyon latidens by Xiaoming Wang, Richard H. Tedford, et al. (1999).
Phlaocyon mariae is an extinct species of the genus Phlaocyon, belonging to the subfamily Borophaginae and tribe Phlaocyonini, a canid which inhabited central western North America from the Miocene living 20.6—16.3 Ma.