Re:Lagosuchus,...was "dinosaur humps"

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

Larry Febo wrote:

> Well, I guess lagosuchus (/marasuchus) is primitive enough, having all
> preexisting features, to be considered grandfather of all dinosaurs.

_Lagosuchus_ (which is different to _Marasuchus_, although the two are very 
closely related), is probably better thought of as the great-uncle of 
dinosaurs.  I don't believe it was directly ancestral.

> (In cosesaurus some see a precursor to pterosaurs,
> and other`s see "avian" characteristics)......although I haven`t tried to
> draw it as yet, it may prove an interesting project

The latest study of _Cosesaurus aviceps_ (that I know of) put it in among 
the Prolacertiformes.  It's "birdy" characters (like the triangular shape of 
the skull in profile) are very dubious.


Tim

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