FIGURE 3. Maxillaries and upper incisor of H. niobrarensis. Scale bars equal 1 mm. 3.1, UNSM 123307, partial maxillary with P3-P4, from Garner Bridge South. 3.2-3.5, specimens from Valentine Railway Quarries. 3.2, UNSM 122509, partial maxillary with P4. 3.3, UNSM 123348, edentulous maxillary with alveoli for P2-M1. 3.4, UNSM 123186, partial maxilla with P4. 3.5, 122996 (in part), partial upper anterior incisor; anterior view to left, medial view to right. Abbreviation: pf, premolar foramen.