coelophysid
Coelophysidae is a family of early theropod dinosaurs that lived during the Late Triassic and Early Jurassic periods. These dinosaurs are characterized by their slender, lightweight build, long legs, and hollow bones, adaptations that suggest they were agile and fast runners. Coelophysids are among the most primitive known theropods, offering insights into the early evolution of this diverse dinosaur group.
The most famous coelophysid is Coelophysis, whose remains were found in large numbers at the Ghost Ranch
Coelophysids were generally small to medium-sized predators, typically measuring between 1.5 to 6 meters in length.