| 1. | The dentary and premaxilla each hold six pairs of teeth.
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| 2. | Premaxilla short ( especially in juveniles ), with sparse strong lips.
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| 3. | The holotype is MPCA-Pv SM 8, a right premaxilla.
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| 4. | They all have teeth on the premaxilla and maxilla.
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| 5. | The premaxilla has six teeth and the maxilla has at least thirteen teeth.
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| 6. | The syndrome involves hypoplasia of variable severity of cartilaginous nasal septum and premaxilla.
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| 7. | The premaxilla shows a distinctive opening below and in front of the nostril.
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| 8. | Longer than the premaxilla, the nasal bones are the longest in the skull.
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| 9. | The Kayenta specimen possesses four teeth in the premaxilla and sixteen in the maxilla.
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| 10. | The number of tooth positions is highly variable for the premaxilla and maxilla set.
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