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Re: Crocs and such(io)
David Marjanovic wrote:
It's interesting that tooth and jaw characteristics hold less weight
pun) than leg posture when determining the criteria for dinosauria.
Crocs _retain_ some tooth & jaw characteristics that have also been
by many toothed dinosaurs. But retained ( = plesiomorphic) characters
be ignored. Your five-fingered hands don't mean you're closer to
than to the one-fingered horses. The leg posture of dinosaurs,
something new ( = apomorphic), like the placental mode of reproduction
links us with horses to the exclusion of opossums which _retain_ a
The basis for modern taxonomy is evolution. :-)
Splendid points, thanks David. The horse/opossum thing seems familiar -
I wonder: when did crocs and dinosauria diverge?