The elaboration and diversification of sexually selected weapons remain poorly understood.
We argue that progress in this topic has been hindered by a strong bias in sexual selection …

The mammalian cranium (skull without lower jaw) is representative of mammalian diversity
and is thus of particular interest to mammalian biologists across disciplines. One widely …

Species richness varies widely across extant clades, but the causes of this variation remain
poorly understood. We investigate the role of diversification rate heterogeneity in sha** …

The diversity of beak shapes among birds is often assumed to be largely the result of
adaptations to different feeding behaviors and diets. However, this assumption has only …

Geometric morphometrics (GM) and finite element analysis (FEA) are increasingly common
techniques for the study of form and function. We show how principles of quantitative …

Diversification and adaptive radiations are tied to evolvability, which in turn is linked to
morphological integration. Tightly integrated structures typically evolve in unison, whereas …

Morphological, functional, and behavioral adaptations of bats are among the most diverse
within mammals. A strong association between bat skull morphology and feeding behavior …

The shapes of sexually selected weapons differ widely among species, but the drivers of this
diversity remain poorly understood. Existing explanations suggest weapon shapes reflect …

Birds show tremendous ecological disparity in spite of strong biomechanical constraints
imposed by flight. Modular skeletal evolution is generally accepted to have facilitated this …

Opossums are the most diverse and ecologically important group of New World marsupials,
although only the Virginia opossum is familiar to North American residents. In fact, many …