EVOLUTION OF EGG RETENTION IN THE SCELOPORUS SPINOSUS GROUP: EXPLORING THE ROLE OF PHYSIOLOGICAL, ENVIRONMENTAL, AND PHYLOGENETIC FACTORS

@inproceedings{CaldernEspinosa2006EVOLUTIONOE,
  title={EVOLUTION OF EGG RETENTION IN THE SCELOPORUS SPINOSUS GROUP: EXPLORING THE ROLE OF PHYSIOLOGICAL, ENVIRONMENTAL, AND PHYLOGENETIC FACTORS},
  author={Martha Luc{\'i}a Calder{\'o}n-Espinosa and Robin M Andrews and Fausto R. M{\'e}ndez de la Cruz},
  year={2006}
}
The evolution of viviparity in squamates has involved intermediate stages of egg retention. Reduction in the thickness of the eggshell, in relative clutch mass (RCM), and in clutch frequency would have facilitated the transition from oviparity to viviparity, while low temperatures are likely the ultimate selective force that promoted this evolutionary shift. We tested these ideas using the Sceloporus spinosus group. Because it is the sister clade of the viviparous Sceloporus formosus group, we… CONTINUE READING

Citations

Publications citing this paper.
SHOWING 1-10 OF 14 CITATIONS

References

Publications referenced by this paper.
SHOWING 1-10 OF 24 REFERENCES

velopment of the uterine shell glands during the preovulatory and early gestation periods in oviparous and viviparous Lacerta vivipara

J. P. HUELSENBECK, AND F. RONQUIST
  • Journal of Morphology
  • 2005

COMPARE , version 4 . 4 . Computer programs for the statistical analysis of comparative data

AND R. M. ANDREWS
  • 2001