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Re: Age of the Barun Goyot, Djadok(ht)a and Nemegt Formations

AFAIK there was never any doubt that S.
angustirostris and S. osborni belong in the
same genus;

This is not a matter of doubt. This is a matter of belief. Genera are _purely_ subjective affairs.

they may even be the same species.

Fine, but we're completely limited to the morphospecies concept here. Is it now possible to tell lion and tiger skeletons apart...?

(Apart from the fact that some say species, no matter which concept, are just as arbitrary as genera and higher ranks.)