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Deep genealogical history without population differentiation: discordance between mtDNA and allozyme divergence in the zebra-tailed lizard (Callisaurus draconoides).
TLDR
The resulting maternal genealogy supports the former existence of a mid-peninsular seaway and a Plio-Quaternary seaway across the Isthmus of La Paz and disagrees with the very limited population differentiation previously reported for allozyme markers, suggesting that maternal history may not be an appropriate approximation for population differentiation. Expand
Response to Comment on “Erosion of Lizard Diversity by Climate Change and Altered Thermal Niches”
We derived physiological models that accurately predicted extinctions of Mexican and other lizards. Clusella-Trullas and Chown argue that global forecasts are unreliable without incorporatingExpand
Reproductive Cycle of the Lizard Sceloporus mucronatus with Comments on Intraspecific Geographic Variation
TLDR
The longer period of testicular recrudescence (January–July) in the studied population from Tecocomulco suggests plasticity in testicular activity. Expand
Climate change, thermal niches, extinction risk and maternal-effect rescue of toad-headed lizards, Phrynocephalus, in thermal extremes of the Arabian Peninsula to the Qinghai-Tibetan Plateau.
TLDR
An eco-physiological model of extinction risk under climate change premised on behavioral thermoregulation is developed and it is proposed that evolved acclimatization - maternal plasticity - may ameliorate risk, but is poorly studied. Expand
Reproductive Cycle of a High-Elevation, Oviparous Lizard (Sceloporus spinosus: Reptilia: Phrynosomatidae)
Abstract We studied the reproductive cycle of Sceloporus spinosus from Laguna La Preciosa, Puebla, Mexico, elevation 2,400 m. There was no sexual dimorphism in snout–vent length (males, 87.5 mm;Expand
Sperm Viability in the Reproductive Tract of Females in a Population of Sceloporus mucronatus Exhibiting Asynchronous Reproduction
TLDR
It was found that the amount of time sperm were held in the female reproductive tract had no effect on the capacity of sperm to fertilize eggs and sperm retention could have evolved as a response mechanism to deal with the asynchrony between sexes in the reproductive cycles. Expand
Morphological convergence and molecular divergence: the taxonomic status of Sceloporus serrifer (squamata, phrynosomatidae) subspecies
TLDR
Morphological convergence and molecular divergence: the taxonomic status of Sceloporus serrifer (squamata, phrynosomatidae) subspecies subspecies is studied. Expand
Thermoregulation of two sympatric species of horned lizards in the Chihuahuan Desert and their local extinction risk.
TLDR
A novel combination of field, laboratory, and modeling approaches are presented to examine body temperature regulation, habitat thermal quality, and hours of thermal restriction on the activity of two sympatric, aridlands horned lizards at three contrasting Chihuahuan Desert sites in Mexico to estimate local extinction risk under predicted climate change. Expand
CONTINUOUS SPERMATOGENESIS IN THE LIZARD SCELOPORUS BICANTHALIS (SAURIA: PHRYNOSOMATIDAE) FROM HIGH ELEVATION HABITAT OF CENTRAL MEXICO
Sceloporus bicanthalis is a viviparous lizard that inhabits high altitude temperate zone habitats in México. Our histological observations indicate that adult males exhibit spermatogenesis andExpand
Reproductive Activity in Females of the Oviparous Lizard Sceloporus aeneus
TLDR
Females of Sceloporus aeneus have a seasonal reproductive pattern with maximum activity in spring, a pattern typical of temperate oviparous species of the genus. Expand
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