Craniological definitions of Groups A and B, and of Cormohipparions
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 – by a long NIN relative to the length of the cheek (31).
Craniological definition of Cormohipparions versus other archaic skulls
Cormohipparions (SD-2) are characterized by a long preorbital bar (32) relative to the NIN (30).