With the discovery of the basal dinosaur Staurikosaurus, Spondylosoma drew attention as a possible relative. Authors went back and forth on the question, considering it either as a basal dinosaur, or as a "thecodont" or other basal archosaur.
The finding of Staurikosaurus sparked discussion about the relationship between Spondylosoma and other dinosaurs. Some researchers believed Spondylosoma was a primitive dinosaur, while others suggested it belonged to a different group, such as "thecodont" or another early archosaur.