|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Avetheropoda - Songziidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|L. Hou 1990||There is an apparently large dorsal inflection of the bill on the frontal, the nasal does not extend downward, it is holorhinal. Posterior process of the mandible is not developed. The bill is shorter than the length of the cranium. Ulna vertical in shaft. The internal condyle of the tibiotarsus is round. The tuberal of the supratendinal bridge is very well developed. The tarsometatarsus is relatively long, 2/3 of the length of the tibiotarsus. The middle toe is shorter than the tarsometatarsus.|