Diapsid reptiles consisting of , , , and their descendants.

As descendants particularly are the birds, which are included as well in the archosaur clade.

The archosaurs notably possess holes in theirs and which are anterior to their (that is, in front of). There are in addition to the found behind the eyes. The non-crocodile archasaurs in addition possessing an , i.e., as we see in birds.

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