24 02 2017


The heaviest ornithopods – Top 10

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20 February 2015

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Edited: 16 May 2016

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1 comment

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Category: Cretaceous / Dinosaurs / Herbivorous / Jurassic / Top 10

The heaviest ornithopods – Top 10

The heaviest ornithopods – Top 10

The early ornithopods were only about 1 metre (3 feet) long, but probably very fast. They had a stiff tail, like the theropods, to help them balance as they ran on their hind legs. Later ornithopods became more adapted to grazing on all fours; their spines curved, and came to resemble the spines of modern ground-feeders such as the bison.

Parasaurolophus

Parasaurolophus

As they became more adapted to eating while bent over, they became semi-quadrupedal; still running on two legs, and comfortable reaching up into trees; but spending most of their time walking or grazing while on all fours.

Later ornithopods became larger, but never rivalled the incredible size of the long-necked, long-tailed sauropods that they partially supplanted. The very largest, such as Shantungosaurus, were as heavy as medium sized sauropods at up to 23 metric tons (25 short tons) but never grew much beyond 15 metres (50 feet).

Parasaurolophus

Parasaurolophus.

The heaviest ornithopods – Top 10

  1. Magnapaulia laticaudus: 12–23 t
  2. Shantungosaurus giganteus: 9.9–22.5 t
  3. Iguanodon seeleyi: 15 t
  4. Saurolophus angustirostris: 6.6–9 t
  5. Iguanodon bernissartensis: 8.3–8.6 t
  6. Edmontosaurus annectens (Anatotitan): 3.2–7.6 t
  7. Brachylophosaurus canadensis: 4.5–7 t
  8. Saurolophus osborni: 6.6 t
  9. Lanzhousaurus magnidens: 6 t
  10. Parasaurolophus walkeri: 3–5.1 t
  11. Charonosaurus jiayinensis: 5 t
  12. Barsboldia sicinskii: 5 t

 

Ornithopod

Ornithopod.

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