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CeRaToPsIaNs...a different question (s).
I have two questions about ceratopsians.
To me Archaeoceratops and Leptoceratops seems allmost identic - are they
more close than other "protoceratopsians"?
I have only seen photos of the skull of Monoclonius flexus -which turnet
out to be a Centrosaurus apertus. The skull of Monoclonius crassus (which
is supposed to be a valid species) is it very different?