Length of premaxilla less than two-and-a-half times that of the basis cranii.
Beneath the naris the maxilla extends as a broad tapering shelf, the ventral surface of which articulates with the premaxilla.
The premaxilla is rudimentary and loosely attached to the maxilla.
The small lacrimal bone anterior to the plate articulates with the maxilla and the premaxilla.
Both the premaxilla and the maxilla develop processes which form a sheath for the vomer.
Body of the premaxilla pointed and slightly decurved; its length and breadth less than the basis cranii.
The premaxilla is very small; the zygomatic arch is imperfect, and does not reach the squamosal behind.
These three teeth, which are implanted in the premaxilla, form a distinct group, to which the name of “incisor” is applied.
premaxilla pre·max·il·la (prē'māk-sĭl'ə)
Either of two bones located in front of and between the maxillary bones in the upper jaw of vertebrates.