[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
RE: Coelophysid Distribution & Evolution
Amtoine Grant wrote:
I know Coelophysid remains have been found in North America, Europe & North
I wasn't aware that coelophysoids have been found in North Africa. (That
doesn't mean they weren't found here - I just haven't heard of any in that
particular neck of the woods.) Coelophysoid material is certainly known
from southern Africa, in the form of _Megapnosaurus rhodesiensis_ (formerly
_Syntarsus rhodesiensis_) from Zimbabwe, which probably represents a species
of _Coelophysis_ (_C. rhodesiensis_).
As you note, there is also coelophysoid material from Europe. These include
various named species, such as _Procompsognathus triassicus_ and
_Liliensternus liliensterni_ (both Germany), and _"Liliensternus"
airelensis_ (France), as well as "_Syntarsus_" material from Wales and a
bunch of other fragmentary remains.
Asia... Irmis (2004) reports _Megapnosaurus_ material from the Early
Jurassic of China. The Indian taxon _Alwalkeria maleriensis_ has been
called a coelophysoid, but the evidence is weak. "_Dilophosaurus" sinensis_
might not even be a ceratosaur.
And of course there is the abundant coelophysoid material from the U.S.:
_Coelophysis bauri_, _Segisaurus halli_, "_Syntarsus"_ kayentakatae_,
_Dilophosaurus wetherilli_, _Gojirasaurus quayi_ and some other poorly known
(and possibly indeterminate) species. Coelophysoid afinities have been
touted for the South American theropod _Zupaysaurus_, but these have yet to
come to fruition.
Also, how many coelophysids are known worldwide from the Late Triassic [and
http://personal2.stthomas.edu/jstweet/neotheropoda.htm has a nice summary.
Also, it seems coelophysids went extinct after the Early Jurassic, except
for Lilensternus & Dilophosaurus, which seem to be direct derivations of
North American species.
No, _Liliensternus_ and _Dilophosaurus_ are Early Jurassic. If there were
any coelophysoids known from after the Early Jurassic, I'd like to hear
about them. Looks like they may have gone extinct then. They had a good