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With fear and trepidation, owing to my great respect for Dave Martill, I would
like to state that these were the same arguments given against live birth in
mosasaurs. River environments were prefered nursuries for them too. Gorden
Bell and Amy Sheldon have pretty much dealt with this problem with some very
splendid specimens. Some very small polycotylids from the Pierre Shale in
South Dakota may turn out to be newborns also. Have some patience and we'll
see. Dan Varner.
P.S. I hope that most of you on the list don't object too much about
occasional mentions of marine reptiles from the age of dinosaurs. We marine
enthusiasts should probably be on the vertpaleo list but we love dinosaurs,
too, and we are afraid of mice, rodents, and other small mammals that imitate
insects.
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