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have neural projections similar to that of _Ouranosaurus_ and _Spinosaurus_
and they have humps, not sails.
And went on further to say that the humps were potentially fatty and stored
energy, etc., like bison (and camels I presume). The reference does not
come immediately to mind, but it was published in the journal of
paleontology if I recall correctly. My problem with this idea was that the
large neural spines of a bison are supporting large muscles and the nuchal
ligament for their big heads. Camels, which have very large humps, do not
have very large neural spines. Can we infer a fatty hump from tall neural
spines? What's up with spinosaurs, then, or for that matter Dimetrodon and
other pelycosaurs? I'm not sure I'm convinced. As both animals used as
analogs here are mammals, that makes me more leary. Perhaps mammals in
desert climes are developing these fatty humps for energy and water storage
in part because they excrete urea. They lose more water than a reptile or
bird, which excretes uric acid, a much more water conservative fluid/paste.
As dinosaurs probably excreted uric acid, the need for a water-storage hump
seems less likely. I cannot think of a bird or reptile with fatty storage
sacs/humps, but if those of you out there can, please post to the list.
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