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Morrison Formation turtle tracks question
I've been reading John Foster's "Jurassic West" about the Morrison, and in the
chapter on trace fossils Foster talks about the formation's few turtle
trackways being classified in the ichnogenus Chelonipus, yet on the next page
the diagram of the tracks refers them to Chelonichnium. Does anyone know which
it is? Or both?
The text sort of obliquely implies that the tracks may have actually been
REclassified into Chelonipus from an unnamed ichnogenus. Presumably they could
have been reclassified from Chelonichnium, but I'm loathe to try to guess at
what the author wanted to say, since I lack any expertise.
Does anyone have any knowledge or good references discussing Morrison turtle