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cervical vertebrae in Archosauromorphs
I was just looking at Benton and Allen's 1997 paper on Boreopricea.
And if I am reading their character table correctly, they show
Rhynchosaurus, Trilophosaurus and Megalancosaurus as having 7 or fewer
cervical vertebrae. I do not know off hand how many cervical vertebrae
there are in choristoderes.
However, if I am reading Benton and Allen correctly, Longisquama might
fit in rather nicely as a basal Archosauromorph in the vicinity of
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