Re: Herrerasaurus and Ischisaurus

["Timothy Williams" <twilliams_alpha@hotmail.com>]

Evengelos Giakoumatos wrote:

> I understand that Ischi has benn sunk into Herrera, but when, why and by
> whom.  Last I checked Ischi was still the subject of further research.

_Ischisaurus cattoi_ and _Frenguellisaurus ischigualastensis_ are both based 
on specimens that appear to be referrable to _Herrerasaurus 
ischigualastensis_.  This was done by Sereno and Novas - e.g. Novas, F.E. 
(1994). J. Vert. Pal. 13: 400-423.  Hence, both names are junior synonyms of 
_H. ischigualastensis_.

However, in a recent paper - maybe it was the description of _Guaibasaurus_ 
by Bonaparte et al. (1999) - the referral of _Ischi_ to _Herrera_ was 
disputed.  I can't remember the reasons why, and I can't check at the moment 
because all my dino papers are in a different state at the moment.

Hope that helps!


Tim

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