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Re: Extinction once again (crocs)

On Mon, 19 Feb 2001, Brian Choo wrote:

> ...> That would have to be Mekosuchus inexpectus...not a ziphodont but 
> (surprise
> surprise) a mekosuchine and was as such a relict insular population of an
> aussie radiation of the Crocodylidae (following Willis's assessment of the
> group) that went extinct on the continent in the late Pleistocene. Was
 almost certainly a semiaquatic form although some continental
> representatives of the group were terrestrial.

Do we know why Australia harbors more large crocs and varanids than other
continents?  Was Mekosuchus a big croc?
John Bois