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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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