Sauropodomorpha is the clade of the long-necked, herbivorous dinosaurs, within the order Saurischia, and existed from the Late Triassic (ca. 230 Ma) to the end of the Cretaceous (c.a. 65 Ma). Their closest relatives are the bipedal carnovorous Theropoda dinosaurs. Members of Sauropodomorpha can be characterized by their huge body siz, their long necks and tails, and their relatively small head. These dinosaurs were quadrupedal, and they were the largest land animals ever lived on Earth. Sauropodomorpha includs Sauropoda and their predecessors, Prosauropoda. Prosauropoda species, like Plateosaurus, lived during the Late Triassic period, they had smaller body size, and was able to walk on two legs. These huge terrestrial herbivores had a strong effect to the vegetation of the Mesozoic Era, and they were the dominant herbivorous land organisms while they existed. Members od Sauropodomorpha were found in all continents with the exception aof Antartica[1][2][3][4].

Scientific references

[1] Martin, A.J. (2006): Introduction to the Study of Dinosaurs. Second Edition. Oxford, Blackwell Publishing. pg. 299-300. ISBN 1-4051-3413-5.

[2] Müller, Rodrigo T.; Garcia, Maurício S. (2019): Rise of an empire: analysing the high diversity of the earliest sauropodomorph dinosaurs through distinct hypotheses. Historical Biology, 32 (10): 1334-1339. doi: 10.1080/08912963.2019.1587754.

[3] Sereno, P.C. (1998): A rationale for phylogenetic definitions, with applications to the higher-level taxonomy of Dinosauria. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 210: 41-83. doi: 10.1127/njgpa/210/1998/41.

[4] Baron, M.G.; Norman, D.B.; Barrett, P.M. (2017): A new hypothesis of dinosaur relationships and early dinosaur evolution. Nature, 543 (7646): 501-506. doi: 10.1038/nature21700.