Journal
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
Volume 107, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsames.2020.103145
Keywords
Sauropodomorpha; Triassic; Dinosauria; South Americ
Categories
Funding
- Agencia de Promocion Cientifico y Tecnologica [PICT 2015-0504, 2016-0236]
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Sauropodomorpha is the first major dinosaurian group that emerged during the Triassic period, showing significant changes in body structure and adaptation to different ecological niches. The South American record of sauropodomorphs provides key insights into the evolutionary process of these dinosaurs.
Sauropodomorpha is the first major dinosaurian group that radiated during the Triassic. During this time the group underwent major changes in body plan, including the acquisition of features related to herbivory, large body size, and quadrupedality. By the end of the Late Triassic, approximately 30 million years after the origin of dinosaurs, sauropodomorphs predominated the niches of large herbivores in continental ecosystems throughout the world. The Triassic sauropodomorph diversity includes diverse lineages with great disparity in body size, feeding biomechanics, and locomotion types, ranging from small (similar to 10 kg) bipedal taxa to the large (>5 tons) quadrupedal lessemsaurids. The South American record has provided key information to understand certain stages of this evolutionary radiation. We review here the diversity and composition of sauropodomorph faunas throughout the Late Triassic of South America and highlight their contribution for understanding the evolution of this group.
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