The ontogeny of early-diverging dinosauromorphs is poorly understood because few
ontogenetic series from the same species-level taxon are known and what is available has …

Many hypotheses have been proposed for the rise of dinosaurs, but their early diversification
remains poorly understood. This paper examines the occurrences, species diversity and …

Non-crocodyliform crocodylomorphs, often called 'sphenosuchians', were the earliest-
diverging lineages of Crocodylomorpha, and document the stepwise acquisition of many of …

Charles Darwin's theories, first published more than 150 years ago, still set the paradigm of
how we understand the evolution of life--but scientific advances of recent decades have …

Abstract Vancleavea campi Long & Murry, 1995, from the Late Triassic of western North
America, represents the latest surviving non-archosaurian archosauriform known to date …

We present new evidence for a major inflection point in the history of tetrapods on land, a
jump in the diversification of archosauromorphs, primarily dinosaurs, at 232–230 Ma. This …

A major unresolved aspect of the rise of dinosaurs is why early dinosaurs and their relatives
were rare and species-poor at low paleolatitudes throughout the Late Triassic Period, a …

Ichnological evidence suggests that dinosauromorphs originated by the Early Triassic, and
skeletal remains of non-dinosaur representatives of the clade occur from the Anisian to the …

Scleromochlus taylori is one of the most enigmatic members of the herpetofauna from the
Lossiemouth Sandstone Formation (Upper Triassic) of Elgin (Moray, Scotland). For many …

All described feathers in nonavian theropods are composite structures formed by multiple
filaments. They closely resemble relatively advanced stages predicted by developmental …