Incisivosaurus
The initial description of Incisivosaurus showed that the skull, about 10 cm in length (4 inches), had the most complete dentition known for any oviraptorosaur. Their cladistic analysis indicated that Incisivosaurus lies at the base of the oviraptorosaurs, making it more basal than Caudipteryx and Oviraptor. The distinguishing skeletal features of Incisivosaurus, include a long snout that made up about half the total length of the skull, a slender lower jaw with a long fenestra (opening), and its distinctive, large, flattened front teeth. In addition to these unique features, Incisivosaurus shared many traits with more typical oviraptorosaurs, so it is classified in that group.