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Skull proportions, excluding the size of the preorbital â€˜bar’ (32) : Dinohippus & Pliohippus

lundi 31 mai 2010

Dinohippus and Pliohippus Dinohippus 11724, 87201, and Pliohippus 12998 have similar proportions (Dino-Plio 1) but only the last one has a well developped POF. Five other skulls are all different (Dino-Plio 2).

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Skull proportions, excluding the size of the preorbital â€˜bar’ (32) : Group B

lundi 31 mai 2010

Group B. B-1. Thirteen skulls referrable to Cormohipparion B, differ from the group A mostly by their longer naso-incisival notches. They tend also to have longer muzzles and shorter palates. B-2. Two skulls are similar but quite smaller. B-3. Five skulls have a long muzzle. B-4. One (…)

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Skull proportions, excluding the size of the preorbital â€˜bar’ (32) : Group A

lundi 31 mai 2010

Group A. A-1 : Height adult skulls and two juveniles may be easily referred to Cormohipparion A. They are characterized by relatively long palates (2), wide muzzles 15), and short naso-incisival notches (NNI=30). A-2 : Sixteen skulls are similar but smaller, and have a deeper naso-incisival (…)

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Skull proportions, excluding the size of the preorbital â€˜bar’ (32) : Lakotahippus s.l.

lundi 31 mai 2010

As the variation is the largest for measures of the fossa, especially its distance from the orbit (’bar’ : mesure 32), I have drawn separate ratio digrams for other dimensions : 5=post-palatal length ; 23=anterior ocular line ; 2=palatal length ; 1=muzzle length ; 15=maximal muzzle breadth ; (…)

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Craniological definitions of Groups A and B, and of Cormohipparions

lundi 31 mai 2010

Craniological definition of Group A versus Group B The first scatter diagram (SD-1) shows that Group A is characterized by a short naso-incisival notch (NIN=30), Group B â€“ by a long NIN relative to the length of the cheek (31). Craniological definition of Cormohipparions versus other (…)

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