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

*To*: Multiple recipients of list <dinosaur@lepomis.psych.upenn.edu>*Subject*: Re: Meglania weighed only 1 tonne (long)*From*: "Nicholas R. Longrich" <longrich@phoenix.Princeton.EDU>*Date*: Thu, 30 Nov 1995 09:43:22 -0500*Reply-to*: longrich@phoenix.Princeton.EDU*Sender*: dinosaur@lepomis.psych.upenn.edu

> New material discovered since Hecht (1975) indicates a size of > approximately 1.5 times the largest specimens Hecht got to look at. As a > linear extrapolation, that puts us in the 1.5 tonne region. > Rich and Hall (1984) in Vertebrate Zoogeography and Evolution in > Australasia detail how the reconstruction of Megalania was produced. This > is the reconstruction tha Greg keeps refering to and it is 5.5 metres long, > not 7 metres. Of interest, they note that many dimensions are not linear, > but indicate that at a certain length, growth slowed and bulk took off. A > similar situation as occurs in really big crocs. An 18 foot croc usually > weighs half as much again as a 15 foot croc. Now, if the 5.5 metre > Megalania (based on Hecht's material) clocks in at 1 tonne, it is quite > concievable that elements that are 1.5 times that size come from an > individual of considerably greater mass, not a linear 1.5 tonnes, but > something approaching 2 tonnes or more. Again, the material is fragmentary > and the extrapolations are tentative, but the ball park figure is way in > excess of 1 tonne as the upper limit for Megalania mass. > pwillis@ozemail.com.au Mass varies with the volume of an animal, not the length. Length is a single dimension. Volume has length, width and depth. So a one ton Megalania scaled up 1.5 times is not 1x1.5 but 1 ton x 1.5 x 1.5 x 1.5 which comes out to roughly 3.4 times as big, assuming, of course, that it stays perfectly proportioned (which, of course, it won't).

- Prev by Date:
**Re: SMALL ANIMALS?** - Next by Date:
**Re: (long) Still more on respiratory turbinates** - Previous by thread:
**Re: Meglania weighed only 1 tonne (long)** - Next by thread:
**Roy Moodie, America's 1st paleopatholgist** - Indexes: