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

RE: [dinosaur] Fossorial Origin of the Turtle Shell

> -----Original Message-----
> From: dinosaur-l-request@usc.edu [mailto:dinosaur-l-request@usc.edu] On 
> Behalf Of Tim Williams
> Sent: Monday, July 18, 2016 4:14 AM
> To: dinosaur-l@usc.edu
> Subject: Re: [dinosaur] Fossorial Origin of the Turtle Shell
> Dann Pigdon <dannj@alphalink.com.au> wrote:
> > The echidna's weekly developed electroceptors certainly suggest an
> > aquatic origin. However the platypus is also an accomplished digger,
> > which raises the possibility that the theoretical aquatic platypus/echidna 
> > ancestor may have itself arisen from burrowers, making the
> echidna secondarily fossorial as wll.
> Interesting.  I guess, for small tetrapods, swimming and digging/burrowing go 
> together quite well - which makes the transition quite
> easy in either direction.
Even animals larger like this--muskrats, beavers--are both burrowers and 

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu         Phone: 301-405-4084
Principal Lecturer, Vertebrate Paleontology
Office: Geology 4106, 8000 Regents Dr., College Park MD 20742
Dept. of Geology, University of Maryland
Phone: 301-405-6965
Fax: 301-314-9661              

Faculty Director, Science & Global Change Program, College Park Scholars
Office: Centreville 1216, 4243 Valley Dr., College Park MD 20742
Fax: 301-314-9843

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        8000 Regents Drive
                        University of Maryland
                        College Park, MD 20742-4211 USA