[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Mammal - Like - Reptiles ... info needed.
At 09:45 AM 2/23/98 -0500, ashapli wrote:
>For that matter, what is the current status of the pelycosaurs? It seems
>to me that I had heard a couple of years ago that they were no longer
>considered a valid group, but I have continued to see them refered to since
The "pelycosaurs" are pretty clearly a paraphyletic group: sphenacodonts
like Dimetrodon are much closer to Therapsida than are the "haptodonts" (a
paraphyletic grade) or Edaphosaurus or the caseids.
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:firstname.lastname@example.org
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661