What are the defining characteristics of the Theropoda lineage as it emerged in the Triassic?

Feb 24, 1997 ... The fossil record reveals that dinosaurs first appeared in the Triassic Period, between 250 to 213 million years ago. It also indicates that ... Sep 22, 2022 ... ... dinosaurs were in fact lizard-hipped. The results are reported in the ... periods/Mesozoic era/Triassic period; /Physical sciences/Earth ... What we thought were unique body shapes in many dinosaurs actually evolved millions of years before in the Triassic Period.” -Sterling Nesbitt, Virginia ... ... were almost completely gone and the dinosaurs began their 135 million-year domination on our planet. “Stiff Competition: For much of the Triassic period ... The Triassic period is a part of the geologic timescale where the precursors to dinosaurs (a type of crocodile-like reptiles called archosaurs) were the ... Feb 9, 2002 ... The Triassic dinosaurs wore much smaller than those living in the successive periods of the Mesozoic. They were mostly slender and few reached a ... Jul 28, 2022 ... At the end of the Triassic period, roughly 201 million years ago, most amphibious creatures and crocodile-like creatures that lived in the ... Feb 23, 2023 ... Dinosaurs were alive in the Cretaceous, Jurassic, and Triassic Periods, which together comprise the Mesozoic Era. Except for relatively ... They first emerged during the Triassic period around 245 million years ago. ... Around 80 per cent of crocodilian species were wiped out in the extinction event ... Mar 29, 2018 ... The earliest mammals entered the scene, and reptiles — including early dinosaurs — lived on Pangea, the name given to the giant landmass in ...