Genetic Differentiation among Mountain Island Populations of the Striped Plateau Lizard, Sceloporus virgatus (Squamata: Phrynosomatidae)

Atypical reproductive cycles in a population of Sceloporus grammicus (Squamata: Phrynosomatidae) from the Mexican Plateau

The spiny lizard Sceloporus grammicus (Squamata: Phrynosomatidae) is a small reptile from central México and the southern United States, occurring in a wide geographic area characterized by extensive variation in topographic and climatic regimes. Genetic variation among lineages from central México is substantial, though the extent to which this variation corresponds with life-history traits re...

Striped plateau lizards (Sceloporus virgatus) do not exhibit behavioral syndromes in exploratory and anti-predator contexts

Gonadal modulation of in vitro steroidogenic properties of dispersed adrenocortical cells from Sceloporus lizards.

Effects of adrenal corticosteroids on reproductive and endocrine functions of the gonads are well known, but reciprocal effects of gonadal hormones on the hypothalamo-pituitary-adrenal (HPA) axis and on adrenocortical steroidogenesis in particular have received much less attention. We investigated effects of gonadectomy and testosterone (T) replacement on adrenocortical cell function in a year-...

Reproductive cycles and reproductive strategies among populations of the Rose‐bellied Lizard Sceloporus variabilis (Squamata: Phrynosomatidae) from central Mexico

Species with wide distribution, generally show variations in life history characteristics, which can be attributed to environmental causes. In this study, we analyzed the reproductive cycle and reproductive characteristics from three populations (Atlapexco, San Pablo Tetlapayac, and Santa Catarina) of the lizard Sceloporus variabilis from central Mexico. The specific goal of this study was to e...

Genetic Relationships among Populations of Sceloporus Undulatus Fail to Support Present Subspecific Designations

The eastern fence lizard, Sceloporus undulatus, is a broadly distributed polytypic species. We surveyed allozyme variation with the goal of generating an intraspecific phylogeny to evaluate the current classification of the species. We electrophoretically assayed 24 loci from 12 populations of S. undulatus, which comprised 6 of the 11 recognized subspecies, 3 additional species of Sceloporus (S...