Herrerasaurus

Herrerasaurus is an early predatory dinosaur genus known from Late Triassic fossils in Argentina. Its anatomy preserves evidence about the early evolution of theropods and other dinosaurs.

Late Triassic: The final epoch of the Triassic Period, spanning roughly 237 to 201 million years ago. Herrerasaurus lived during this interval, when dinosaurs were diversifying.
Bipedalism: Locomotion in which an animal supports and moves its body primarily on two legs. Herrerasaurus's hindlimbs and body proportions indicate habitual two-legged movement.
Victorino Herrera: An Andean goatherd who discovered the fossils later named Herrerasaurus in Argentina. His 1959 discovery led researchers to the animal's first described remains.
Herrerasaurus ischigualastensis: The sole named species of Herrerasaurus, based on fossils from Late Triassic Argentina. This species anchors the genus and its diagnostic anatomical evidence.
Ischigualasto Formation: A Late Triassic rock formation in northwestern Argentina rich in terrestrial vertebrate fossils. Its deposits preserve the fossils that establish Herrerasaurus's age and setting.
Predation: An interaction in which one organism captures and consumes another organism. Its sharp teeth and grasping forelimbs fit a predatory way of life.
Osvaldo Reig: An Argentine paleontologist who formally described Herrerasaurus in 1963. Reig established the genus and species from the early fossil material.
Ischigualasto Provincial Park: A protected area in Argentina that contains fossil-rich Triassic strata of the Ischigualasto Formation. Its outcrops expose the formation associated with Herrerasaurus fossils.
Dinosaur: A member of the reptile group Dinosauria, which includes birds and extinct terrestrial lineages. Herrerasaurus is among the earliest known dinosaurs.
Dinosaurian locomotion: The ways dinosaurs moved, shaped by limb posture, anatomy, and body size. Its limb structure helps illuminate locomotion near the beginning of dinosaur history.

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CoelophysisCompared with: It contrasts with Coelophysis in body size and illustrates the diversity of early predatory dinosaurs.