Dreadnoughtus

Filed under Cretaceous dinosaurs · Types of Dinosaurs editorial team

Order: Saurischia · Suborder: Sauropoda · Infraorder: Titanosauria · Family: Titanosauria (family not firmly confirmed)

Dreadnoughtus was a colossal titanosaurian sauropod that inhabited what is now Argentina during the Late Cretaceous period. Measuring 85 feet in length, this massive herbivore ranked among the heaviest land animals ever to exist. The dinosaur's name, meaning "fears nothing," alludes to the likely invulnerability of a fully grown adult to predation, given its extraordinary size and strength.

What makes Dreadnoughtus particularly significant to paleontologists is the exceptional completeness of its fossil skeleton. Sauropods of such immense proportions are typically known from fragmentary remains, making reliable reconstruction difficult. The Dreadnoughtus specimen, however, preserves a large proportion of the animal's body, allowing scientists to establish its proportions with unusual confidence. The dinosaur possessed an extremely long neck and tail relative to its already enormous body, anatomical features characteristic of the titanosaur family.

Though many aspects of Dreadnoughtus remain subjects of ongoing study, the quality and extent of available fossil evidence have made it one of the most thoroughly understood giant sauropods on record, offering invaluable insights into how the largest terrestrial animals of the Cretaceous were constructed and how they moved through their ancient world.

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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.

Related dinosaurs

Other dinosaurs from the Titanosauria family.