After Wang, Tedford & Taylor, 1999
    †Microtomarchus Wang, Tedford & Taylor, 1999
        †Microtomarchus conferta (Matthew, 1918)
            ?†Tephrocyon cf. temerarius (Leidy, 1858); Matthew & Cook, 1909 (AMNH 13859)
            †Tephrocyon confertus Matthew, 1918
            †Nothocyon vulpinus coloradoensis Thorpe, 1922b
            †Tomarctus confertus (Matthew); Matthew, 1924
            †Tomarctus confertus (Matthew);Hough, 1948
            †Tomarctus confertus (Matthew); Downs, 1956
            †Tomarctus paulus Henshaw, 1942
            †Tomarctus paulus Henshaw; Downs, 1956
            †Tomarctus paulus Henshaw; Munthe, 1998
            †Nothocyon vulpinus (Matthew, 1907): Galbreath, 1953
            †Tomarctus cf. T. paula (Henshaw): Honey and Izett, 1988
            †Tomarctus? confertus (Matthew): Munthe, 1998
            †Microtomarchus conferta (Matthew); Wang, Tedford & Taylor, 1999
Reference(s):
- Wang, X., Tedford, R. H. & Taylor, B. E., 1999: Phylogenetic systematics of the Borophaginae (Carnivora, Canidae).
–Bulletin of the American Museum of Natural History: Vol. #243, pp. 1-391 [http://hdl.handle.net/2246/1588] 
 
