REPRODUCTIVE-BIOLOGY OF THE LIZARD TROPIDURUS-SPINULOSUS IN THE CHACOOF SALTA, ARGENTINA

We studied a population of Tropidurus spinulosus, an arboreal lizard s pecies from the dry chaco of Salta, Argentina. This species is reprodu cing seasonally. Females are reproductively active from November to Ja nuary, whereas males are October through December. More than a clutch per cycle could be laid. Clutch size was 5.0 and is positively correla ted to snout-vent length. Reproductive characteristics are similar to other Tropidurus species. Arboreality and environmental adaptations ar e proximal interpretations of the species-specific reproductive biolog y in this lizard.