TYPE SPECIES:
• A. portentosus Kurzanov, 1981 "0 bird mimic"

Animalia
Vertebrata
Tetrapoda
Sauropsida
Archosauromorpha
Ornithodira
Dinosauria
Theropoda
Tetanurae
Coelurosauria

Some have suggested that the small, toothless(?) Avimimus was feathered. It had little ridges running along its arms that may represent anchor points for feather shafts, although birds generally have bone "pimples" for anchor points instead of straight ridges.

This animal is difficult to classify. Its metatarsals were pinched, like those of arctometatarsalians, caenagnathids, and advanced alvarezsaurs. It may belong to any or none of these groups. It had some very bird-like traits, and its head was somewhat similar to oviraptorids. It has even been suggested that it may be a chimera made up of two different animals, but a recent find seems to dispel this idea.

Avimimus may be related to Caudipteryx and/or Kakuru.

I.    Alvarezsaurus calvoi
II.   Coelophysis bauri
III.  Baryonyx walkeri
IV.   Oviraptor philoceratops
V.    Aublysodon mirandis
VI.   Anserimimus planinychus
VII.  Avimimus portentosus
VIII. Compsognathus longipes
IX.   Carnotaurus sastrei
X.    Ceratosaurus nasicornis

 I.    Avimimus portentosus
 II.   Kakuru kujani (based on Avimimus portentosus)
 III.  Sinornithoides youngi
 IV.   Borogovia gracilicrus (based on other Troodontidae)
 V.    Byronosaurus jaffei
 VI.   Troodon formosus
 VII.  Tochisaurus nemegtensis (based on other Troodontidae)
 VIII. Saurornithoides mongoliensis
 IX.   Saurornithoides asiamericanus (based on Saurornithoides mongoliensis)
 X.    Saurornithoides isfarensis (based on Saurornithoides mongoliensis)
 XI.   Saurornithoides junior (based on Saurornithoides mongoliensis)