ɪt wʌz ɐsˈaɪnd tə ðə nˈɪmɹɐvˌɪdiː baɪ lˈeɪdi wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti fˈoːɹ; ænd tə ðə nˈɪmɹɐvˌɪniː baɪ flˈɪn ænd ɡˌæliˈɑːnoʊ nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi tˈuː, bɹˈaɪənt nˈaɪntiːnhˈʌndɹɪd nˈaɪnti wˈʌn, ænd mˈɑːɹtɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt.
It was assigned to the Nimravidae by Leidy (1854); and to the Nimravinae by Flynn and Galiano (1982), Bryant (1991), and Martin (1998).