Study uncovers hidden gills and fish-like teeth in 345-million-year-old fossil, challenging ideas about the origins of reptiles.

Abstract. Large phylogenetic trees are often unbalanced near the root, with a species-depauperate lineage sister to a far more species-rich clade. The spec

Scientific Reports - Hard-object feeding adaptations infer relative predator-prey size relationships in Devonian placoderms

The impact of the Permian–Triassic mass extinction on marine vertebrates is incompletely understood due to their scarce fossil record. To better understand marine vertebrate extinction and recovery...

A well-preserved fossil snake from the Late Cretaceous of Brazil shows early ecological and brain shape disparity in the group.

Modern amphibians are characterized by an aquatic larval stage that ends abruptly with a period of widespread tissue remodeling (metamorphosis) upon transition to terrestrial adulthood. A transient la...

Complex axial skeletal morphology has evolved in mammals and some reptiles. Here the authors combine morphometrics with a maximum likelihood model to find that axial heterogeneity is associated with b...