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Re: Richardostesia teeth



ackolbert@aol.com wrote-

Are there any other animals that have both serrated and unserrated teeth within a species?

Yes. Among theropods- coelophysids, juvenile tyrannosaurids, most basal coelurosaurs, Microraptor and Graciliraptor.


Further, R.gil. (classic raptor shape, both serrated and unserrated) and R.sp (straight isoceles triangle shape) are so different, I wonder why they are both attributed to Richardostesia in the first place?

Because they both have very tiny serrations. So does Nuthetes, which I believe falls into the range of Richardoestesia morphotypes.


Mickey Mortimer