Lower premolars or molars? How to tell them apart?
A lower P2 is not hard to distinguish from a lower M3 (Fig.1). Actually these differences are caricatures of differences between other lower premolars and molars. About seventy years ago Gromova noted them: develoment of the hypostylid (short, wide and flattened on premolars, elongated and narrow on molars), relative anterior and posterior occlusal widths (Fig.2).
A third difference is in the angle between occlusal surface and dental crown: on premolars the occlusal surface is close to perpendicular to the crown while it is slanting on molars.
No distinction is ever one hundred percent sure but I have found Gromova’s observations correct and very reliable.
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Véra Eisenmann
Articles by this author
- Eisenmann V, Howe J., Pichardo M. Old World hemiones ans New World slender species (Mammalia, Equidae)species
- Predictive use of modern reference osteological colections for disentangling the shape of Eurasiatic equid cheek teeth and metapodials in archaeological material
- The equids from Liventsovka and other localities of the Khaprovskii Faunal Complex, Russia: A revision
- The Late Middle Pleistocene Oumm Qatafa mammalian fauna of Oumm Qatafa, Judean Desert
- Additional Information
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Various Tools and Notes (English)
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