Phylogenetic signal is the tendency for closely related species to display similar trait values
due to their common ancestry. Several methods have been developed for quantifying …

Despite nearly two centuries of investigation, a comprehensive understanding of dinosaur
biology has proven intractable. The recent development of means to study tissue-level …

We present novel findings on sauropod bone histology that cast doubt on general
palaeohistological concepts concerning the true nature of woven bone in primary cortical …

A central focus of ecology and biogeography is to determine the factors that govern spatial
variation in biodiversity. Here, we examined patterns of ant diversity along climatic gradients …

Metabolic heat production in archosaurs has played an important role in their evolutionary
radiation during the Mesozoic, and their ancestral metabolic condition has long been a …

One classic explanation for the remarkable diversity of flower colors across angiosperms
involves evolutionary shifts among different types of pollinators with different color …

The Mantel test, based on comparisons of distance matrices, is commonly employed in
comparative biology, but its statistical properties in this context are unknown. Here, we …

A study on the most exhaustive taxonomic sample of amniotes (75 extant and nine extinct
taxa) of any quantitative work on this topic published so far demonstrates a strong …

Dinosauria debuted on Earth's stage in the aftermath of the Permo-Triassic Mass Extinction
Event, and survived two other Triassic extinction intervals to eventually dominate terrestrial …

Three possible hypotheses could explain the polarity of the histological features of basal
archosauriform and archosauromorph reptiles: either, the fibrolamellar complex is basal; or …