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Re: Antentonitirus pro-nun-see-a-shun?

Mickey Mortimer wrote:

First, as Holtz said, Blikanosaurus and Melanorosaurus are equally old.
Isn't Euskelosaurus too, indeterminate or not?

There may be other Late Triassic sauropods besides these. The Isalo Formation of Madagascar has yielded at least two sauropod taxa: _Lapparentosaurus madagascariensis_, and an unnamed _Bothriospondylus_ species. The Isalo Formation was previously estimated to be of Middle Jurassic (Bathonian) age, but Flynn et al. (1999) imply that the entire Isalo Group may be of Triassic age. Prosauropod material was recovered from the older "Isalo II", and given as Middle Triassic age.

Not that I'm against using this definition of Sauropoda, but people have to realize it's more of a change in taxonomy than knowledge that's giving us so many early/basal sauropods.

A good point. _Blikanasaurus_, _Melanorosaurus_ and _Anchisaurus_ have not suddenly become more "sauropod-like". As Mickey said, what's happened is that the name "Sauropoda" has slid further down the sauropodomorph tree, pulled there by the reorganization of basal sauropodomorphs. By dint of its stem-based definition, the composition of Sauropoda is at the mercy of _Plateosaurus_ and its relative position in sauropodomorph phylogeny.



Flynn, J.J. et al. (1999). A Triassic fauna from Madagascar, including early dinosaurs. Science 286 (5440): 763-765.

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