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Re: Scutema



In a message dated 96-11-14 03:59:56 EST, jpoling@dinosauria.com (Jeff
Poling) writes:

<<    Anybody know if _Euparkaria_ or any other early archosaurs ... or even
 earlier animals in the archosaur lineage ... had crocodylian/dinosaurian
scutes? >>

A double row of dorsal scutes/scutellae is considered primitive
(plesiomorphic) for Archosauria, at least above the proterosuchians (in which
such scutellae may have existed but may not have been preserved in the
relatively few known specimens). These developed in various different (and
characteristic) ways among the various groups. And yes, _Euparkeria_ had
them; I believe they're readily visible in the type partial skeleton. Besides
the dorsal paired rows of small, overlapping scutellae there was at least one
more row of smaller scutellae lateral to the dorsal rows on each side.