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DVL-0045Specimen Record

Dreadnoughtus

Dreadnoughtus schrani

dred-NAWT-us SHRAH-nee

AI Reconstruction of Dreadnoughtus schrani, generated in 2026
  • Super-Long Neck: Stretching around 11 metres with at least 13 neck bones, this incredible neck could sweep through a huge arc of plants without the body moving an inch. The vertebrae have deep air pockets called pleurocoels that made the bones lighter while keeping them strong — like nature's own weight-saving engineering.
  • Barrel Body: That massive, barrel-shaped ribcage wasn't just for show — it held a giant digestive system needed to break down enough plants to fuel a 38,000 kg body. The preserved ribs are among the longest of any titanosaur, making this trunk so wide it would dwarf a modern elephant.
  • Pillar Thighbone: The thighbone stands nearly 1.9 metres tall — about as long as a tall adult human — and is built like a straight column to handle enormous weight with minimal stress. Studies of the bone's inner structure show fast-growing tissue, revealing this giant was still growing when it died!
  • Balancing Tail: Dozens of tail bones formed a long, tapering tail that acted like a counterweight to that enormous neck, keeping the dinosaur balanced over its four legs. The tail bones near the hips are extra thick and wide where powerful muscles attached, suggesting the tail was actively controlled — not just dragging behind.
  • Sturdy Front Legs: The upper arm bone is thick but shorter than the thighbone, a design that shifted more body weight onto the back legs. Fossilised footprints from related titanosaurs show narrow front footprints and wider back ones, hinting that Dreadnoughtus walked with a distinctive rolling stride.
●Late Cretaceous100.5–66 myaSaurischiaTitanosaur🌿 Herbivore🐾 Quadruped

One of the largest dinosaurs ever found with decent remains, this Patagonian titan was still growing when it died — and already weighed as much as a dozen elephants.

Did you know?
  • The type specimen was still a juvenile when it died, meaning fully grown adults were likely even larger than the 26-meter specimen we have

About

Dreadnoughtus schrani was a colossal titanosaurian that roamed what is now Argentina during the Late Cretaceous period, approximately 77 million years ago. Named after the early 20th century battleships called "dreadnoughts" (meaning "fears nothing"), this massive herbivore earned its intimidating name through sheer size — an adult Dreadnoughtus would have had no natural predators capable of threatening it.

The discovery of Dreadnoughtus represents a paleontological milestone. Two partial skeletons were excavated from the Cerro Fortaleza Formation in Santa Cruz Province, Argentina, between 2005 and 2009 by a team led by Kenneth Lacovara. The specimen preserves over 70% of the types of bones in the skeleton (excluding the skull), making it the most complete giant ever found. This exceptional preservation allows scientists to make unusually confident estimates about its size and proportions.

What makes Dreadnoughtus particularly remarkable is that the type specimen was still growing when it died. Analysis of bone microstructure reveals that this individual — already measuring 26 meters long and weighing an estimated 48-49 metric tons — had not yet reached full maturity. We may never know just how large a fully grown Dreadnoughtus could become.

Dreadnoughtus possessed the classic titanosaur body plan: a long neck for reaching vegetation, a barrel-shaped torso housing an enormous digestive system, and a lengthy tail for counterbalance. Its robust limb bones, particularly the and humerus, reveal the structural adaptations necessary to support such tremendous weight on land.

Quick Facts

Scientific name
Dreadnoughtus schrani
Group
Sauropodomorph · Titanosauridae
Lived
Late Cretaceous, 83.6–72.2 million years ago
Diet
Herbivore
Movement
Walked on four legs
Fossils found in
Cerro Fortaleza Formation (Santa Cruz Province, Argentina)
Discovery credited to
2005, Kenneth Lacovara
Holotype
MPM-PV 1156 · Museo Padre Molina, Río Gallegos
DinoVault record
DVL-0045

Where fossils were found

Cerro Fortaleza Formation prehistoric landscape

Cerro Fortaleza Formation

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Modern location

Santa Cruz Province · Argentina

When it lived

83.6–72.2 million years ago(11.4m year span)

Where Dreadnoughtus Roamed

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During the late Cretaceous period, Dreadnoughtus schrani roamed the temperate forests of southern Patagonia, then part of the fragmenting supercontinent Gondwana, where a humid, seasonal climate supported lush vegetation along river floodplains that would eventually become Argentina's Santa Cruz Province.

Keep exploring the vault

Patagotitan
⚔️ Rival

Patagotitan

Both are giant titanosaurid sauropods from Patagonia during the Late Cretaceous, representing the largest land animals of their ecosystem.

Saltasaurus
🔀 Evolutionary echo

Saltasaurus

Saltasaurus loricatus

Both are South American titanosaurs that independently evolved extreme gigantism and similar body plans during the Late Cretaceous.

Argentinosaurus
🔀 Evolutionary echo

Argentinosaurus

Argentinosaurus huinculensis

Both represent the titanosaurid push toward extreme gigantism in South America.

Giganotosaurus
🗺️ Formation neighbor

Giganotosaurus

Giganotosaurus carolinii

Both lived in Late Cretaceous Argentina, though Giganotosaurus is slightly older (~99-97 mya).

Sources & Citation

Cite this record

Records are updated as research changes, so citations include the date you accessed this page.

Length estimates
Lacovara et al. 2014; based on exceptionally complete holotype
Height estimates
Estimated shoulder height from limb proportions; Lacovara et al. 2014
Weight estimates
Lacovara et al. 2014 (original 59t); revised estimates by Bates et al. 2015 suggest lower mass
Speed estimates
Extrapolated from general sauropod locomotion studies; no direct evidence