[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Dead Men Don't Wear New Papers

"The apparent scarcity of prosauropods in Upper Triassic strata of the Newark Supergroup is interpreted as an artifact of ecological partitioning, created by the habitat range and dietary preferences of phytosaurs and by the preservational biases at that time within the lithofacies of the Newark Supergroup basins."

Phytosaurs? Probably not, but what was meant? Sauropodomorphs or aetosaurs?

No, I think they meant phytosaurs -- what they were trying to say (nearly 100% data-free though it is) is that the absence of "prosauropod" fossils, particularly footprints in the near-lacustrine environments, in the Triassic of the Newark Basin (and, I suppose, the American southwest) had to do with them avoiding the phytosaurs, which must then have had a preference for "prosaurosteak." Only when the phytosaurs went out at the end of the Triassic could the "prosauropods" come near enough to potentially fossil-producing environments to leave footprints and bones. Weird, when "prosauropods" clearly had no problem coexisting with phytosaurs elsewhere...

Jerry D. Harris
Director of Paleontology
Dixie State College
Science Building
225 South 700 East
St. George, UT  84770   USA
Phone: (435) 652-7758
Fax: (435) 656-4022
E-mail: jharris@dixie.edu
and     dinogami@gmail.com

"Trying to estimate the divergence times
of fungal, algal or prokaryotic groups on
the basis of a partial reptilian fossil and
protein sequences from mice and humans
is like trying to decipher Demotic Egyptian with
the help of an odometer and the Oxford
English Dictionary."
-- D. Graur & W. Martin (_Trends
in Genetics_ 20[2], 2004)