Assertion: hoatzin | /r/HasProperty | derived bird
Facets:
value: very
type: DEGREE
Source sentences:
text: Previous studies have placed the Hoatzin in different parts of the bird family tree; however, despite its unusual and primitive morphology, genetic studies have shown the hoatzin is not as primitive or as ancient as once thought, and that it could be a very derived bird that reverted to or retains some plesiomorphic traits.