Archosauriformes have previously been included in the suborder Proterosuchia of the order Thecodontia.
2.
In mid-20th century textbooks, like Alfred Sherwood Romer's " suborders of the now-abandoned order Thecodontia.
3.
"' Proterosuchia "'refers to one of the suborders of thecodontia; specifically the most primitive and ancestral forms.
4.
As such, it is usually dumped in favour of a new, more restrictive name ( for example, Rhynchocephalia or Thecodontia ), or abandoned altogether ( for example, " Simia " ).
5.
Other fossils found in the park include those of advanced cynodontia ( canine toothed animals ), small thecodontia ( animals with teeth set firmly in the jaw ), bird-like and crocodile-like dinosaurs.
6.
The description of the basal ornithodires " Lagerpeton " and " Lagosuchus " in the 1970s provided evidence that linked thecodonts with dinosaurs, and contributed to the disuse of the term " Thecodontia ", which many cladists consider an artificial grouping.
7.
Because they are considered a " basal stock ", thecodonts are paraphyletic, meaning that they form a group that does not include all descendants of its last common ancestor : in this case, the more derived crocodilians and birds are excluded from " Thecodontia " as it was formerly understood.
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