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Alamosaurus

Restoration of Spinosaurus, a large sail-backed predatory dinosaur
Photo: Brondon Bobah, CC BY 4.0, via Wikimedia Commons
Pronunciation
AL-uh-mo-SAWR-us
Name means
Alamo Lizard
Diet
Herbivore
Posture
Quadrupedal
Period
Late Cretaceous
Length
69 feet (21 meters)
Height
28 feet (8.5 meters)
Weight
60,000 lbs (27,216 kg)

Order: Saurischia · Suborder: Sauropodomorpha · Infraorder: Sauropoda · Family: Titanosauridae

Found in New Mexico, Texas and Utah, Alamosaurus is North America'sonly titanosaurid and one of the last sauropods living at the end of the Age of Dinosaurs. It may have come to North America from South America where sauropods, titanosaurs in particular, remained abundant throughout the Cretaceous Period. Although its name suggests an event in Texas history, Alamosaurus was named for the Ojo Alamo trading post in New Mexico.

Mounted Apatosaurus skeleton, a massive long-necked sauropod
Photo: MCDinosaurhunter, CC BY-SA 3.0, via Wikimedia Commons

More Cretaceous-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 Alamosaurus mean?

The name Alamosaurus means “Alamo Lizard”. It is pronounced AL-uh-mo-SAWR-us.

When did Alamosaurus live?

Alamosaurus lived during the Late Cretaceous.

Was Alamosaurus a carnivore or a herbivore?

Alamosaurus was a herbivore.

How big was Alamosaurus?

Alamosaurus was about 69 feet (21 meters) long, around 28 feet (8.5 meters) tall, weighing up to 60,000 lbs (27,216 kg).

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