A scientific team from the Doñana Biological Station – CSIC has looked at the variation in body size, appendage lengths, and other morphological traits across elevation and time in the Mountain Treeshrew, an endemic species from Borneo.
This new research suggests that this small mammal violates (entirely or partially) Bergmann’s and Allen’s rules. These are two key ecogeographical rules that describe size and shape variation among organisms, and predict that populations become...