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In a message dated 96-02-05 13:59:10 EST, Thomas_R_HOLTZ@umail.umd.edu (th81)
>The Alaskan region is a jigsaw puzzle of microterranes. Whole careers are
>devoted to putting this back together.
>Anatomical evidence of phylogenetic similarity on both sides of the Bering
>Strait is evidence for some land connection. Plant and microvert
>similarities further support this.
Right. There _certainly_ was a land connection _at some time_ during the
Cretaceous. But what about specifically the Campanian and Maastrichtian? And
what about the idea of a free faunal interchange between eastern Asia and
western North America during those epochs/stages? The phylogenetic
similarities are simply not close enough to be very convincing.