| the ultrastructure of spermatid development during spermiogenesis within the rosebelly lizard, sceloporus variabilis (reptilia, squamata, phrynosomatidae). | several recent studies have mapped out the characters of spermiogenesis within several species of squamates. many of these data have shown both conserved and possibly apomorphic morphological traits that could be important in future phylogenetic analysis within reptilia. there, however, has not been a recent study that compares spermiogenesis and its similarities or differences between two species of reptile that reside in the same genus. thus, the present analysis details the changes to spermio ... | 2014 | 24186265 |
| ontogenic development of spermatids during spermiogenesis in the high altitude bunchgrass lizard (sceloporus bicanthalis). | the body of ultrastructural data on spermatid characters during spermiogenesis continues to grow in reptiles, but is still relatively limited within the squamates. this study focuses on the ontogenic events of spermiogenesis within a viviparous and continually spermatogenic lizard, from high altitude in mexico. between the months of june and august, testicular tissues were collected from eight spermatogenically active bunchgrass lizards (sceloporus bicanthalis) from nevado de toluca, méxico. the ... | 2012 | 22670219 |
| temporal germ cell development strategy during continuous spermatogenesis within the montane lizard, sceloporus bicanthalis (squamata; phrynosomatidae). | sceloporus bicanthalis is a viviparous lizard that lives at higher elevations in mexico. adult male s. bicanthalis were collected (n = 36) from the nevado de toluca, mexico (elevation is 4200 m) during august to december, 2007 and january to july, 2008. testes were extracted, fixed in trumps, and dehydrated in a graded series of ethanol. tissues were embedded, sectioned (2 μm), stained, and examined via a light microscope to determine the spermatogenic developmental strategy of s. bicanthalis. i ... | 2011 | 21752450 |