Accueil du site > Equidae tridactyles (Hipparions sensu lato) > Northamerican archaic skulls and mandibles > Size of Pre-orbital bar (32)
Skull proportions and size of the pre-orbital bar
lundi 31 mai 2010 par Véra Eisenmann
Skull proportions and size of the preorbital bar (32)
1. Compared to many other ancient Northamerican equids (SD-2) Scatter diagram 2, all ‘typical’ Cormohipparion A and B (morphs 1) have a longer bar (32) relative to the length of the NIN (30).
2. The separations is, however, not so sharp (SD-3) when other morphs A and B are plotted :
the skull from June Q. 613-150 (A-7) occupies an intermediate position between Cormohipparion A and B ;
the skull 107764 from Trail Side Kat (B-2) plots close to Leptarchus 108644 (A-7) ;
Cormohipparion goorisi 69600 is not very far from the ‘small 32’ group.
3. The next scatter diagram (SD-4) shows the overlap between Cormohipparion A and all other Group A skulls, including those without POF.
Documents joints
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Scatter diagram 3 (Excel - 81 ko)
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Scatter diagram 4 (Excel - 75.5 ko)
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Equidae tridactyles (Hipparions sensu lato)
Northamerican archaic skulls and mandibles
Size of Pre-orbital bar (32)
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