Cheng, Wang & Chang 2002)
"Gauthier’s Incisor Lizard"
When it lived:
Cretaceous Period - 120 MYA
Liaoning Province, China
without a doubt, one of the strangest dinosaurs ever discovered. A
relative of the more famous Oviraptor, this turkey-sized dinosaur is
the oldest known member of its group, the so called “egg thief”
dinosaurs, or Oviraptorids. Contrary to its family name,
Incisivosaurus probably did not eat eggs, due to its unusual mouth
design. Unlike other Oviraptorids, which have a beak in place of the
toothy jaws found in most meat-eating dinosaurs, Incisivosaurus had
none. Like rabbits and rodents, it was a gnawer, probably feeding on
conifer seeds and other hard plants and plant parts. Polished pebbles
found in the stomach area of the Incisivosaurus remains show that it
swallowed stones to grind the food up further, much as many birds do
But that wasn’t Incisivosaurus’ most unusual feature. While most
other Oviraptorids had no teeth, besides the two bony prongs located
on the roof of their mouths, Incisivosaurus had a mouth full of
plant-grinding molars, premolars, incisors, and canines. And at the
very front of the mouth was a pair of enormous gnawing incisors,
similar to the “buckteeth” found in mice and beavers. These bizarre
teeth have given rise to countless absurd descriptions of
Incisivosaurus, from “the bucktoothed oviraptorid” to “the rabbitosaurus”.
It has been called "a cross between Bugs Bunny and the Road Runner”.
However you describe it, Incisivosaurus was obviously no carnivore.
Known from a long skull and a cervical .The name refers to the
prominent incisiform premaxillary teeth at the front of its jaw
similar to those used by rodents for gnawing and Jacques Gauthier. Incisivosaurus lacks the bird-like features found in
others of its group. According to the describers , the bucked teeth
suggest the dinosaur was an herbivore rather than a carnivore like its