Experimental manipulation of microevolution (changes in frequency of heritable traits in
populations) has shed much light on evolutionary processes. But many evolutionary …

The Cretaceous Western Interior Basin reflects the interplay between the North American
craton and allochthonous terranes to the west. We divide the basinal stratigraphy into three …

Large-diameter ichnofossils comprising three morphotypes have been identified in the
Upper Triassic Ischigualasto and Los Colorados formations of northwestern Argentina …

Tenontosaurus tilletti was an abundant ornithischian dinosaur from the Lower Cretaceous of
North America, commonly regarded as a 'basal'iguanodontian. Here, we describe a …

Burrowing behavior is an important adaptation of animals that live in arid and semi-arid
conditions. In this paper, we describe examples of vertebrate burrows from the Upper …

We describe a globally rare example of a tetrapod burrow from the Upper Cretaceous Bauru
Group (Bauru Basin) from Peirópolis, Minas Gerais State, Brazil. The sedimentary …

We describe a new genus and species of a basal iguanodontian ornithopod dinosaur,
Pareisactus evrostos, from lower Maastrichtian strata of the Conques Formation in the south …

For rodents, hearing is essential to survival. It enables predator evasion, prey detection, and
conspecific recognition; it is also likely to be constrained by the physical environment. The …

Here we describe three fossil feathers from the Early Cretaceous Santana Formation of the
Araripe Basin, Brazil. Feathers are the most complex multiform vertebrate integuments; they …

The Bajo Barreal Formation (Cenomanian, Late Cretaceous; central Patagonia, Argentina)
preserves an important and rich fossil record. Among the dinosaurs described, a small …