Species morphological changes can be mutually influenced by environmental or biotic
factors, such as competition. South American canids represent a quite recent radiation of …

Aim Bergmann's rule is an ecogeographical rule that describes a negative relationship
between body size and temperature. Here, we used a multivariate measure of skull size …

Didelphis albiventris and D. aurita are Neotropical marsupials that share a unique
evolutionary history and both are largely distributed throughout South America, being …

Environmental pressures are key mechanisms in the change of size or shape of an
organism. In addition to external factors, the pressure of allometry (size-related shape …

A large part of extant and past mammalian morphological diversity is related to variation in
size through allometric effects. Previous studies suggested that craniofacial allometry is the …

The family Ursidae is currently one of the taxonomic groups with the lowest number of
species among Carnivora. Extant bear species exhibit broad ecological adaptations both at …

Litter size in mammals can be influenced by morphological and environmental variables.
Among mammals, the family Didelphidae includes a diverse group of New World endemic …

Tribosphenic molars are considered great innovations in mammals and are related to
several structures and variables that can explain adaptation. The aim of this study was to …

Quantification and analysis of shape is an important component of many paleoecological
studies. Geometric morphometrics is a powerful shape analysis tool that allows its user to …

It is not a new concept that marsupials and placentals are distant and distinct clades among
mammals. In South America, these animals coexist, occupy similar niches and, in some …