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RE: Aliwalia and friends
Adam Yates wrote:
A new name would then be required for the large clade that is the sister
group of Plateosauridae.
How about "Brontosauria"? _Brontosaurus_ may be gone, but at least the name
could live on in another form.
While on the topic of prosauropods, David Marjanovic wrote:
Is *P. longiceps* regarded as a separate species in this paper, as it is in
Galton's two-part monograph?
Moser (2003) disagrees with a lot of what Galton says. For example, Moser
sinks _P. longiceps_ into _P. engelhardti_. Galton distinguished _P.
engelhardti_ by the position of sacral rib 2, which Galton identied as being
in the posterior 75% of the centrum of sacral vertebra 2 in _P.
engelhardti_, but in the anterior 75% of the centrum of sacral vertebra 2 in
_P. longiceps_. However, according to Moser, Galton had the sacrum of _P.
engelhardti_ backwards! Thus, the position of sacral rib 2 is the same.
Incidentally, this sacrum of _P. engelhardti_ was nominated by Moser to be
the lectotype for the species. _Dimodosaurus_ and _Pachysaurus_ are
confirmed as junior synonyms of _Plateosaurus_, but as I said previously,
Moser resurrected _Gresslyosaurus_.
Moser (2003) also disputes the use of the shape of the femoral shaft as a
reliable diagnostic character. He argues that the degree of sigmoidal
curvature of the shaft is very prone to taphonomic distortion.