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StephanPickering@cs.com wrote-
> Megalosauridae Huxley 1869 nomen conservandum is a
clade of basal Tetanure
> consisting of (in chronological order): Megalosaurus
nethercombensis, M. bucklandii, > Metriacanthosaurus reynoldsi, M. brevis,
Eustreptospondylus oxoniensis,
> Metriacanthosaurus parkeri, Megalosaurus phillipsi,
Poekilopleuron bucklandii,
> Megalosaurus tanneri.
What material is known for Metriacanthosaurus reynoldsi, M.
brevis and Megalosaurus phillipsi? When and where did they live? How
are they distinguishable from Metriacanthosaurus parkeri and Megalosaurus
bucklandi respectively?
> Streptospondylus altdorfensis is more closely related
to Allosaurus fragilis and
> Allosaurus whitei AMNH 666 (+ AMNH 5735 topotype)
than it is to Megalosauridae.
What
is "Streptospondylus" altdorfensis known from? What is it's
diagnosis, when and where did it live? How is Allosaurus whitei
distinguished from A. fragilis, A. "jimmadseni" and A. maximus?
> Proceratosaurus is NOT a ceratosaur, but shares
interesting similarities to
> Ornitholestes, being in my book Maniraptoriformes
incertae sedis.
Don't know about that.
Those basal coelurosaurs are difficult to organize. I see no
assurance Ornitholestes is in the Ornithomimosauria + Maniraptora clade, though
I would say it is tyrannoraptoran.
> Ceratosauria may yet prove to be paraphyletic,
Liliensternus + Dilophosaurus +
> Walkersaurus hesperis being more closely related to
each other than to
> Coelophysis/Syntarsus, Merosaurus newmani, Sarcosaurus,
Elaphrosaurus.
Insert "Merosaurus newmani" for the taxa I asked about
above. All of these species you named are lacking details for most
everyone right now.
> As I have noted previously, I believe "Spinosauridae" to be
a nomen dubium. A
> convenient name, predicated upon drawings of a lost
specimen, and in the absence of
> skull/skeleton of a growth series of individua! ! ls for
comparative analyses, is not
> acceptable.
Just because specimens are lost does not make the
taxon a nomen dubium according to the ICZN. The dorsal vertebrae
illustrated are quite distinguishable, with no reason to doubt the artist's
accuracy.
Mickey Mortimer
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