Re: Compys

[Dinogeorge@aol.com]

On   96-01-04 22:59:38 EST pharrinj@PLU.edu writes:

>On Thu, 4 Jan 1996 Dinogeorge@aol.com wrote:

>>In a message dated 96-01-04 21:03:40 EST, TRDix@aol.com
>>writes:
>>
>>>I thought that a large number of Compys have been discovered
>>>at the Ghost Ranch in Arizona.  Am I mistaken about the find?
>> 
>>Oops. Those are _Rioarribasaurus_ (formerly referred to
>>_Coelophysis_, which is probably a distinct genus from the GR
>>theropods). No Compys at Ghost Ranch!
 
>What features distinguish _C. bauri_ from _R. colberti_?  What
>about _Longosaurus_ and _Podokesaurus_?

>From the forthcoming paper by Sullivan, Lucas, Heckert & Hunt (in
press in _Palaeontologische Zeitschrift_):

"...unlike _Rioarribasaurus_ and _Syntarsus_, _Coelophysis_ has a
pelvic obturator foramen not enclosed by the pubis, the femoral
head is wedge-shaped in proximal view and greatly offset from the
shaft, and the metatarsals are not proximally fused, but the
proximal portions of metatarsal II overlaps III anteriorly, among
other features. Our planned redescription of the syntypes,
original referred specimens, and the recently discovered probable
topotypes [of _Coelophysis_] will further detail these
differences and establish _Coelophysis_ as a genus distinct from
both _Syntarsus_ and _Rioarribasaurus_."

I don't think _Longosaurus_ and _Podokesaurus_ specimens are directly
comparable. Have to check this.