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| | Sabre-tooths and Hominids (Site not responding. Last check: 2007-10-16) |
 | | The earliest presence of Megantereon is recorded at 4.5 Ma in the Bone Valley Formation (Florida), where it is represented by M. |
 | | Elongate and flattened upper canines of two basic types: Homotherium (tribe Homotherine) had scimitar-shaped canines relatively short and broad, which were serrated bearing coarse crenulations, while Megantereon (tribe Smilodontini) showed dirk-shaped canines, extremely long, narrow, and without serrations. |
 | | Enlarged upper incisors, which are relatively longer, thicker, more pointed and procumbent than in modern felids, and reduced, incisor-shaped lower canines. |
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