New Insights on the Natural History of Odontophrynus asper (Phillippi, 1902) (Anura, Odontophrynidae): Relating Diet, Sexual Dimorphism, and Longevity

Investigations into aspects of the life history of species such as sexual dimorphism, diet, and longevity are important for understanding the natural history of species. Here, we evaluate sexual size dimorphism and sexual and ontogenetic variation in the diet of the Odontophrynus asper in southern Brazil. We found that males are larger than females. Although there is no intersexual difference in diet, there is ontogenetic variation, with juveniles exhibiting a broader niche. Furthermore, males are longer-lived, living up to 8 years, while females live up to 6 years. Overall, eye–snout distance and femur and tibia-fibula length reflected age more accurately than body size and should be included in future studies.