Bernardino Rivadavia Natural Sciences Museum

Built for bulk: posture, microanatomy and soft tissue shaped gigantism in Sauropoda

Abstract Sauropodomorph dinosaurs show how appendicular skeletal architecture accommodated extreme increases in body mass. Although sauropod gigantism has been linked to columnar limbs, wide-gauge posture, thick articular cartilage and tubular long-bone organization, the biomecha...

Titanosaur eggshells from the latest Cretaceous of Patagonia, Argentina: implications for nesting at high latitude

Abstract Dinosaur egg remains are rarely found in areas of high palaeolatitudes, with Canada (approx. 57–60° N) and Siberia (approx. 70–75° N) yielding the most polarward occurrences. Here, we describe dinosaur eggshells from the Upper Cretaceous (Maastrichtian) Chorrillo Formati...

Evaluating three alternative scenarios for the origin of a disjunct Arctium tomentosum population in the Pyrenees

Background Disjunctions in species distributions offer natural experiments for investigating the mechanisms underlying distributional breaks, such as range contraction, long-distance pollen transport, or long-distance seed dispersal. Here, we document and characterise a floristic...

Dawn of the dinosaurs demonstrates early diversification bursts and a potential role for neutral dynamics during major evolutionary radiations

Abstract Major radiations have given rise to huge swathes of life on Earth, and understanding their dynamics reveals the process of biodiversity generation itself. The rise of dinosaurs and other archosaurs during the Triassic was a spectacular example of such a radiation; it set...