31. Pristichampsids also have a notch between the premaxilla bone at the tip of the upper jaw and the maxilla behind it. 32. Acanthomorphs have developed spiny cycloid scales of other groups ), tooth-bearing premaxilla and greater adaptations to high speed swimming. 33. This is accomplished with a hinge made of the joints between the premaxilla and maxilla bones and the lacrimal and prefrontal bones. 34. The premaxilla bones make up almost 50 % of the entire skull length, and both sides are filled with small holes. 35. The marginal tooth rows in mosasauroids like " Clidastes " are found on the premaxilla , maxilla and the dentary. 36. It consists of a partial mandible; a premaxilla , present in the same rock, is referred to it as paratype. 37. The point of the upper jaw, composed of the premaxilla bones, was slender and had a needle-like tip. 38. In " T . alexandrae " the premaxilla was toothless, beaked, with pseudodont dentition of bony projections. 39. "Wargosuchus " is MOZ-PV 6134, a partial right premaxilla and maxilla, and partial skull roof. 40. The premaxilla and maxilla of the upper jaw attach closely to each other, making a continuous row of evenly spaced teeth.
