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Matthew Savitsky wrote-
What is the estimated weight of Spinosaurus
aegyptiacus? I've heard 4 tons, 6 tons, and 8 tons (from JP Institute Dinosaur
Field Guide)
As I said before (http://www.cmnh.org/fun/dinosaur-archive/2001Jul/msg00619.html),
the holotype of Spinosaurus was about 17.4 meters long. Using this length
to estimate the mass based on Paul's (1988) estimates for related species
(Ceratosaurus, Piatnitzkysaurus, Eustreptospondylus, Yangchuanosaurus), gives
masses from twelve to nineteen tons. Much larger than any estimates you
listed. Still, it is lighter than a hypothetical 17.4 meter long
Tyrannosaurus (25 tons). Baryonyx's and Suchomimus' holotypes would weigh
in at 1.7-2.7 and 2.9-4.8 tons respectively.
Mickey Mortimer
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