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UNCINATES
<<Well, uncinates are present in tuataras (ossified, am I right?) and
cartilagenous in crocs. So they say nada, probably, by simply being there,
they are probably primitivefor archosauromorpha+lepidosauromorpha.>>
Tuataras do show uncinates, as do crocs. Heilmann (1926) went through a
list of things with uncinates. _Ichthyostega_ exhibits uncinates too if I'm
not mistaken.
Honestly, I think that dinosaurs primitively lack uncinates and they popped
up again in coelurosaurs sometime.
Matt Troutman
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