Lizards, snakes and amphisbaenians together constitute the Squamata, the largest and
most diverse group of living reptiles. Despite their current success, the early squamate fossil …

Anurans of Laurasia have a long history that begins with the earliest known anuran,
Prosalirus, from the Early Jurassic of Arizona, USA. At that time, western Laurasia (North …

Antlers Formation (Aptian–Albian) of southeastern Oklahoma. Sauroposeidon represents
the culmination of brachiosaurid trends toward lengthening and lightening the neck, and its …

Protohadros byrdi, gen. et sp. nov., from the Cenomanian Woodbine Formation, Texas, is
described on the basis of a disarticulated skull and isolated postcrania. The possession of …

Fossiliferous deposits of the Greenhorn Limestone (Upper Cretaceous) are found on the
Comanche National Grassland in southeastern Colorado. The lowest portion of the …

Body size is of fundamental importance in understanding macroevolutionary patterns, both
for extant taxa and for those with a fossil record. In this paper we describe four different kinds …

The Terlingua local fauna is a rich assemblage of predominantly terrestrial micro vertebrates
from the Upper Cretaceous Aguja Formation of Trans-Pecos Texas. Marine invertebrates …

ABSTRACT The upper Cedar Mountain Formation, Emery Coun-ty, Utah, has yielded a rich
vertebrate fauna including nearly 80 taxa of Chondrichthyes, Osteichthyes, Lissamphibia …

The discovery of numerous bones and armor of a new genus of ankylosaur closely related to
the British Polacanthus Owen in the Yellow Cat Member of the Cedar Mountain Formation of …

Intensifying macrovertebrate reconnaissance together with refined age-dating of mid-
Cretaceous assemblages in recent decades is producing a more nuanced understanding of …