The origin and radiation of mammals are key events in the history of life, with fossils placing
the origin at 220 million years ago, in the Late Triassic period. The earliest mammals …

Spinosaurids are among the most distinctive and yet poorly-known of large-bodied theropod
dinosaurs, a situation exacerbated by their mostly fragmentary fossil record and competing …

The striking resemblance of long-snouted aquatic mammals and reptiles has long been
considered an example of morphological convergence, yet the true cause of this similarity …

The giant theropod Spinosaurus was an unusual animal and highly derived in many ways,
and interpretations of its ecology remain controversial. Recent papers have added …

The Spinosauridae is a specialized group of theropod dinosaurs characterised by a long,
narrow skull, robust forelimbs with a hooked thumb claw, and tall neural spines forming a …

Sigilmassasaurus brevicollis is an enigmatic theropod dinosaur from the early Late
Cretaceous (Cenomanian) of Morocco, originally based on a few isolated cervical vertebrae …

Abstract During the Mesozoic, Crocodylomorpha had a much higher taxonomic and
morphological diversity than today. Members of one particularly successful clade …

Existing classifications of snout shape within Crocodylia are supported by functional studies,
but ecological surveys often reveal a higher than expected diversity of prey items within …

Abstract Since the Permian, Earth's aquatic ecosystems have been ecologically dominated
by numerous lineages of predatory amniotes. Many of these groups evolved elevated ridges …

Remains of enigmatic spinosaurs from mid-Cretaceous North African strata have, for over a
century, been the subject of taxonomic deliberations. The gigantic Spinosaurus aegyptiacus …