|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Artiodactyla - Merycoidodontidae
It was recombined as Phenacocoelus leptoscelos by Woodburne et al. (1974), Stevens (1977) and MacFadden (1980); it was recombined as Merychyus leptoscelos by Kelly and Lander (1988); it was synonymized subjectively with Merycoides harrisonensis by Lander (1998); it was recombined as Ustatochoerus leptoscelos by Stevens and Stevens (1989), Woodburne (1998) and Stevens and Stevens (2007).
|Year||Name and author|
|1969||Hypsiops leptoscelos Stevens et al. pp. 26-29 figs. Fig. 9, A-C, F-I; Table 3|
|1974||Phenacocoelus leptoscelos Woodburne et al. p. 19 figs. Text-fig. 6, A to D ; Table 2|
|1977||Phenacocoelus leptoscelos Stevens|
|1980||Phenacocoelus leptoscelos MacFadden p. 96|
|1988||Merychyus leptoscelos Kelly and Lander|
|1989||Ustatochoerus leptoscelos Stevens and Stevens|
|1998||Ustatochoerus leptoscelos Woodburne|
|2007||Ustatochoerus leptoscelos Stevens and Stevens p. 166|
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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.