(1) Two major bones of the upper jaw, the maxilla , and the premaxilla, were previously firmly attached to the skull and had teeth.

(2) The right maxilla , measuring 4.5 x 4.5 x 5 cm, was received for pathologic evaluation.

(3) In the dried skin, the maxilla is blackish except for the tip, which is paler.

(4) It may also have had a role in giving some minor flexibility to the snout, as it tends to insert ventrally between the maxilla and premaxilla, and dorsally between the nasal and premaxilla.

(5) Anteriorly, the ventral margin of the maxilla curves dorsally.

(6) The maxilla fuses with the vomer bone and the nasal septum.

(7) There are five large teeth on the maxillae (upper jaw bone), rather short canines, and at least twenty small and uniform post-canines.

(8) Behind the mandibles, Mandibulata bear one, or more typically, two pairs of maxillae , frequently with a long palp, as in the second maxilla of Macrocyclops.

(9) First, Protohadros has a very large pair of maxillae .

(10) The mouthparts consist of a pair of mandibles and 2 pairs of maxillae .