|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Hyaenodonta - Hyaenodontidae
It was synonymized subjectively with Stypolophus by Cope (1877); it was synonymized subjectively with Sinopa by Scott (1892), Wortman (1902), Andrews (1906), Matthew (1909), Matthew and Granger (1915) and Simpson (1951); it was synonymized subjectively with Notharctus by Troxell (1926).
It was assigned to Hyaenodontinae by Van Valen (1967); to Proviverrinae by Peigné et al. (2007); to Hyaenodontidae by Cope (1874), McKenna (1960), Van Valen (1965), Van Valen (1966), Gingerich and Deutsch (1989), McKenna and Bell (1997), Gunnell (1998), Solé et al. (2009) and Rose et al. (2012); and to Sinopaninae by Solé (2013) and Solé et al. (2014).
|Year||Name and author|
|1965||Prototomus Van Valen|
|1966||Prototomus Van Valen|
|1967||Prototomus Van Valen|
|1989||Prototomus Gingerich and Deutsch|
|1997||Prototomus McKenna and Bell|
|2007||Prototomus Peigné et al. p. 453|
|2009||Prototomus Solé et al.|
|2012||Prototomus Rose et al.|
|2014||Prototomus Solé et al.|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.