| slow life histories in lizards living in the highlands of the andes mountains. | in the highlands of the andes, lizards must balance precisely the allocation of energy for growth and reproduction to ensure their survival. we studied the individuals' age, growth rates, age at sexual maturity, and maximum life span of the viviparous lizard phymaturus antofagastensis, endemic of cold and harsh environments at high altitudes in the andes mountains of catamarca province, argentina. we also estimated key life history parameters like reproductive effort, lifetime reproductive effor ... | 2017 | 29150716 |
| asynchronic steroid activity of leydig and sertoli cells related to spermatogenic and testosterone cycle in phymaturus antofagastensis. | the severe environments where phymaturus lizards inhabit in the andes highlands and in patagonia, argentina, impose restrictions on their reproduction, offering a framework for the development of life history strategies to overcome hard weather conditions. among them, prolonged female cycles, asynchrony between sexes in receptivity, and sperm storage in males, were described. asynchrony in the reproductive timing between males and females is a consequence of different energy requirements for gam ... | 2010 | 20152839 |
| a new species of lizard endemic to sierra de fiambalá, northwestern argentina (iguania: liolaemidae: phymaturus). integrated taxonomy using morphology and dna sequences: reporting variation within the antofagastensis lineage. | the northernmost distributed group of lizards belonging to phymaturus occurs in rocky outcrops of the puna region between 3600-4200 m in argentina. in a recent phylogenetic study based on morphological and genetic information, the monophyly of this small lineage was corroborated. this group is formed by phymaturus antofagastensis, p. laurenti, p. denotatus, p. mallimaccii and a population of uncertain taxonomic status until the present study. after obtaining new samples and observations, we desc ... | 2019 | 31966321 |