Apatosaurus louisae

†Apatosaurus louisae is the most completely known Apatosaurus species, a massive diplodocid sauropod from the Late Jurassic of Utah and Colorado. With a length of up to 23m and weight around 22,000kg, its holotype skeleton at the Carnegie Museum is one of the most famous dinosaur mounts. Named in 1916 in honor of Louise Carnegie, patron of the Carnegie Museum of Natural History.

Diet & Feeding

Herbivore

Apatosaurus louisae was a plant-eating dinosaur. Herbivores typically fed on ferns, cycads, conifers, and other vegetation available during their era. Many herbivorous dinosaurs developed specialized teeth and digestive systems for processing tough plant material.

Time Period

Jurassic Late Mesozoic Era

Apatosaurus louisae lived during the Jurassic Late period of the Mesozoic Era, approximately 161.5 to 145.0 million years ago.

One of the most iconic periods for dinosaurs. Giant sauropods like Brachiosaurus and Diplodocus roamed alongside predators like Allosaurus. Archaeopteryx, the earliest known bird, appeared. The Morrison Formation preserves an extraordinary fossil record from this time.