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

Re: marginal differences

From: zone65 <zone65@telstra.com>

How do the two species of Triceratops differ? Again, it's not just a matter of splitting hairs?

Forster (1996) characterized _Triceratops horridus_ as having a long rostrum, an open postfrontal fontanelle, and relatively long supraorbital horncores. She characterized _T. prosus_ as having a short rostrum, a closed postfrontal fontanelle, and relatively short horns. As Lehman (1998) argues, however, these two morphs span "a gradational spectrum of variation" and thus there is likely only one valid species of _Triceratops_, he concludes.

Jordan Mallon

Undergraduate Student, Carleton University
Vertebrate Paleontology & Paleoecology

Paleoart website: http://www.geocities.com/paleoportfolio/
AIM: jslice mallon

The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail