ABSTRACT
The intent of this chapter is to review the major morphological data on the architecture of the testis, the histological ontogeny of spermatogenesis, and the ultrastructure of the mature spermatozoa in lizards. There is a great deal of information on reproduction in male lizards and the above task might seem impossible to encompass in a book chapter. However, much of what has been done in male lizard reproduction focuses on reproductive cycles, mating, the common anatomy/histology of the reproductive tract, or specifi c parts of spermatogenesis. In the last 15 years, there has been an effort to provide ultrastructural information for the spermatozoa in many species of squamates (including both snakes and lizards), which has led to preliminary constructions of phylogenetic relationships between certain families within Squamata (Jamieson 1995, 1999; Oliver et al. 1996; Teixeira et al. 1999; Tavares-Bastos et al. 2002, 2008; Tourmente et al. 2008; Gribbins and Rheubert 2011).
