Comparative Anatomy and Phylogeny of the Gonads and Gametogenesis, Sex Accessory Structures, and Secondary Sexual Characters of Amphibians and Reptiles

Study Group

This site emphasizes results and progress from National Science Foundation grant DEB-0809831 "RUI: The Evolution of Sperm Ducts and Accessory Sex Glands in Squamate Reptiles: An Empirical Study of Cellular Complexity" to David M. Sever.

COLLABORATORS

From left to right: Kevin Gribbins (Wittenberg University), Dustin Siegel (St. Louis University), and Justin Rheubert and David Sever (Southeastern Louisiana University) in the Sever Lab at Southeastern, June 2008. Dustin is holding a cottonmouth, Agkistrodon piscivorous.

From left to right: Kevin Gribbins, David Sever, Brian Crother (Southeastern Louisiana University), and Stan Trauth (Arkansas State University) on Rich Mountain, Arkansas, in April 2009.

David Sever with graduate student Justin Rheubert at the Joint Meeting of Ichthyologists and Herpetologists

annual meeting in Portland, Oregon, July 2009, with their poster, "Preliminary Report of Reproductive Morphology of Iguanian Lizards as Displayed by

Phrynosomatidae and Polychrotidae".

David Sever with graduate student Layla Freeborn at the Joint Meeting of Ichthyologists and Herpetologists

annual meeting in Portland, Oregon, July 2009 with their poster, "Reproductive Morphology of Colubroid Snakes".

Symposium: "Reproductive Biology of the Ophidia"

Organized by Robert D. Aldridge (St. Louis University) and David M. Sever

Sponsored by the Herpetologists' League

Joint Meeting of Herpetologists and Herpetologists, Portland, Oregon, 25 July 2009

Robert Aldridge (left) and David Sever

AM Speakers and the Organizers

From left to right: D. Sever, X. Bonnet, S. Trauth, D. Blackburn, T. Ecay, E. Taylor, M. Parker, R. Aldridge, R. Mason

PM Speakers and the Organizers

From left to right: R. Aldridge, D. Sever, N. Ford, K. Gribbins, A. Bronikowski, D. Siegel, S. Graham, Z. Stahlschmidt, B. Jellen,

R. Krohmer

Click here to see titles of talks and pictures of the presentations

Edited Volume: Reproductive Biology and Phylogeny of Snakes

Edited by Robert D. Aldridge and David M. Sever

Series Editor: Barrie G.M. Jamieson

Published 2011 by Science Publishers, Inc., Enfield, NH

and CRC Press, Boca Raton, FL; 759 pages

Click here to see the list of authors and chapters

D. M. Sever proposes to standarize nomenclature for squamate testicular ducts

In the first paper from his NSF grant, Sever demonstrates that the testicular ducts in snakes and lizards are homologous to those in other amniotes

Click here for a reprint from the Journal of Morphology

The Vertebrate Museum at Southeastern Louisiana University

Click here to see other publications from NSF DEB -0809831

Click here to see the Power Point presentation: "Recent Advances in

Our Knowledge of Comparative Cytology of Sex Accessory Organs

in Squamates" given 26 April 2012 at SE LA Univ