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On 4/6/06, Tim Williams <firstname.lastname@example.org> wrote:
> This experimentation lasts until an evolutionary "tipping point" is reached,
> when the body plan becomes committed to a given ecomorphology (locomotory
> style, in these cases), and there's no way back.
Plesiosaurs, placodonts, icthyosaurs, spheniscids, choristoderans,
mosasauroids, chelonids, cetaceans, pinnipeds, sirenians ...
Or, for avialans: patagopterygids, phorusrhachids, diatrymatids, ratites ...
Better examples would be pterosaurs and bats, where there really
wasn't any locomotory reversion (that we know of, anyway).
The Dinosauricon: http://dino.lm.com
Parry & Carney: http://parryandcarney.com