Morphology captures diet and locomotor types in rodents

Area of Science:

• Ecomorphology
• Evolutionary Biology
• Mammalogy

Background:

• Morphological and ecological diversity are key to understanding species evolution.
• Rodents exhibit significant ecomorphological diversification, making them an ideal model group.
• Phylogenetic relatedness does not always correlate with ecological similarity.

Purpose of the Study:

• To quantitatively link rodent morphology, phylogeny, and ecology.
• To investigate if unrelated species with similar ecologies share distinct morphological features.
• To validate the functional relevance of specific morphological traits for predicting diet and locomotion.

Main Methods:

• Utilized museum collections and ecological literature for data on 208 rodent species.
• Collected data on morphology (cranial, dental, external), diet, and locomotion.
• Employed statistical analyses to account for body size and evolutionary history.

Main Results:

• Unrelated rodent species with similar ecologies share a defined set of morphological features.
• Cranial, dental, and external traits accurately predicted diet and locomotion strategies.
• Morphological characters showed consistent differences aligned with feeding and substrate use.

Conclusions:

• Morphology can reflect functional similarity, an important aspect of community ecology and macroevolution.
• Ecological characters do not always follow strong phylogenetic patterns, challenging assumptions of close-relative similarity.
• Museum specimens provide valuable phenotypic data for ecomorphological studies.