Biotic interactions via the struggle for control of energy and the interactive effects of biota
with their physical environment characterize Van Valen's Red Queen (VRQ). Here, we …

The dicynodont wastebasket genus Dicynodon is revised following a comprehensive review
of nominal species. Most nominal species of Dicynodon pertain to other well-known …

Abstract The Mediterranean Sea has been strongly influenced by human activities for
millennia. Although the environmental history of its surrounding terrestrial ecosystems has …

Climate models predict a dramatic increase in the annual frequency and severity of extreme
weather events during the next century. Here we show that increases in the annual …

ABSTRACT The South African non-archosauriform archosauromorph Prolacerta and the
archosauriforms Proterosuchus, Erythrosuchus, and Euparkeria were important constituents …

Episodes of mass extinction represent the largest events of biodiversity loss known in the
geologic record, and may provide tests of biodiversity-ecosystem stability hypotheses. Here …

The Parareptilia are a small but ecologically and morphologically diverse clade of Permian
and Triassic crown amniotes generally considered to be phylogenetically more proximal to …

Mammal faunas from western North America exhibit no significant change in species
richness with latitude during the Torrejonian (ca. 63–60 Ma) and Tiffanian (ca. 60–58 Ma) …

Human economies and natural ecosystems (natural economies) share fundamental
properties. Both are adaptive, cooperative systems where agents—individuals and groups …

The vertebrate assemblage of the lower Fremouw Formation has been studied for nearly 50
years, but many components remain poorly known. We describe a partial presacral vertebra …