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Re: ... vs energy deficient gigantothermy (boo hiss)

David Marjanovic wrote:

Time alone is not enough, of course. The biggest known mammal of all first
165 or so million years of mammal history was the 1 m long platypus
*Steropodon galmani*.

_Didelphodon vorax_ Marsh 1889, a bader-sized metatherian from the Hell Creek Formation of Montana, was at least as large as _Steropodon galmani_ (and similar-sized monotremes of SE Australia). _Didelphodon_ made a cameo in the BBC's _Walking With Dinosaurs_, in one of the _T. rex_ scenes.



Timothy J. Williams

USDA/ARS Researcher
Agronomy Hall
Iowa State University
Ames IA 50014

Phone: 515 294 9233
Fax:   515 294 3163

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