Types of Dinosaurs.
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Ammosaurus

Triceratops skull showing the three horns and large bony frill
Photo: Vicpeters, CC BY 4.0, via Wikimedia Commons
Pronunciation
AM-uh-SAW-rus
Name means
Sandy Ground Lizard
Diet
Herbivore
Posture
Quadrupedal
Period
Early Jurassic
Length
14 feet (4.3 meters)
Height
6 feet (1.8 meters)

Order: Saurischia · Suborder: Sauropodomorpha · Infraorder: Prosauropoda · Family: Plateosauridae

A medium-sized member of the prosauropod family, this primitive plant-eater was characterized by a small head, long neck and large body. Discovered in a quarry in Connecticut in the late 1800's, only the back half of the specimen was rescued by Othniel Charles Marsh; the front half having already been sawed into blocks to build a bridge near South Manchester. In 1969, more parts of the Ammosaurus were discovered when a nearby sandstone bridge was demolished.

Mounted Diplodocus skeleton, an extremely long Jurassic sauropod
Photo: Dosseman, CC BY-SA 4.0, via Wikimedia Commons

More Jurassic-period dinosaurs →

Reference background: Natural History Museum, London — Dinosaurs; Smithsonian National Museum of Natural History — Dinosaurs; American Museum of Natural History — Dinosaurs & Fossils. Figures are typical published ranges; taxonomy follows the source era and modern consensus is noted where it differs. See our sources & fact-check policy.

Frequently asked questions

What does Ammosaurus mean?

The name Ammosaurus means “Sandy Ground Lizard”. It is pronounced AM-uh-SAW-rus.

When did Ammosaurus live?

Ammosaurus lived during the Early Jurassic.

Was Ammosaurus a carnivore or a herbivore?

Ammosaurus was a herbivore.

How big was Ammosaurus?

Ammosaurus was about 14 feet (4.3 meters) long, around 6 feet (1.8 meters) tall.

Related dinosaurs

Other dinosaurs from the Plateosauridae family.

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