Anteavis crurilongus wandered Earth throughout the Carnian age of the Late Triassic date, 231 to 226 million years earlier.

This dinosaur was around 1.2 m(4 feet)in length and weighed about 8-9 kg.

The ancient types was an early-diverging theropod positioned outside the dinosaur group Neotheropoda, however it had actually suddenly obtained functions formerly believed to be unique to that group.

“It is among the earliest and most primitive dinosaurs understood up until now,” stated Dr. Ricardo Martínez from the Universidad Nacional de San Juan and his coworkers.

“The early diversity of dinosaurs produced a significant eco-friendly modification in the terrestrial environments, culminating with tetrapod assemblages controlled in abundance by dinosaurs by the Triassic/Jurassic border, 201 million years earlier.”

“Therefore, studying the preliminary diversity of dinosaurs is essential to comprehend the facility of Mesozoic assemblages.”

“However, the absence of stratigraphically constant fossil information in the couple of geological systems that maintain the earliest recognized dinosaurs (233-227 million years ago) obscures our understanding of this preliminary diversity.”

The paleontologists uncovered the fossilized remains of Anteavis crurilongus — a partial skeleton and skull– in the Ischigualasto Formation in northwest Argentina in 2014.

“There are really couple of locations worldwide that protect such ancient and unspoiled fossils,” Dr. Martinez stated.

“One of them is the Santa Maria Formation in the Brazilian state of Rio Grande do Sul; the other is the Ischigualasto Formation.”

Anteavis crurilongus resided in a warm and dry savanna about 2 million years after the Carnian pluvial episode.

“We reveal that dinosaur variety and abundance in the Ischigualasto Formation were greater than formerly acknowledged, especially amongst little herbivores (<