The diapsids are believed to have eventually evolved into reptiles, birds and dinosaurs, and the synapsids into mammals. So, when trying to come up with an easily pronounced and spelled name for my domain, I decided upon anapsid. Cyclura Research Information Collection is new as of March 2000 and, as such, is presently a work in progress. Whether you are new to the 'net or not, you may find resources here that will help you enhance your interactions and learning. The different -sid classifications are based on the number of openings in the skull besides the eye sockets.
Anapsids have no other openings, synapsids have one, and diaspids two.
Check out the University of California, Berkeley webpages on anapsida , synapsida , and diapsida .