Incisivosaurus was first described by Xu et al; he explained the skull estimated to be 10 cm length wise; the animal retains most of the dentition which is known to be the development of teeth than any other dinosaur coming under the category of oviraptorosaurian’s. The comparison between various similar kinds of species proved that the Incisivosaurus comes under the oviraptorosaurian classification. Thus proving these dinosaurs survival to be earlier than that of the Caudipteryx and also the oviraptorids.
Another research in the year of 2004 under Osmolska et al explains about the distinct skeletal structure of the animal, they were described to have a big snout protruding out which measures to be half of the entire length contained by the skull. The delicate part of the lower jaw contains a fenestra which is elongated and also contains a unique, large in size front teeth which seems to be flat. Additively more number of automorphies were postulated which was similar in many ways to the oviraptorosaurs which helped in categorizing them under that classification.
Other characteristics encompass its teeth which is many in their number proving the animal to be the earliest of all in the classification. They are also a look alike of the therizinosaurs when both of the animals skull resemble in their characteristics also one more classification coming under the theropod’s which was an herbivore.
Another analysis and examination the skulls fragments was done in three dimension in the year of 2009 and proved the Incisivosaurus to have small pores for air passage similar to that of the birds on the bones of the skull also the oviraptorosaurs had the same, the Incisivosaurus contain lesser number of olfactory lobes and more enlarged optic lobes same as that of the ornithomimosaurs. These anatomical features proved the oviraptorosaurs to be having features similar to that of the birds and hence believed to be related with birds in some way.
The Incisivosaurus contains many feathers which is similar to that of many maniraptoran theropods, the entire body’s length is estimated to be below 1 meter approximately. Also the Protarchaeopteryx is similar in many ways to that of the Incisivosaurus but the entire fragments of both the animal’s fossils have not yet been compared on the whole.