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Dreadnoughtus is a new dinosaur species - and is one of the largest beasts ever to walk the planet. These fun facts for kids will tell you all you need to know! Find out about its size, habitat, diet and more. This  new dinosaur species  was recently discovered and is. Listing 10,000+ pictures of dinosaurs, facts about them and other prehistoric animals, bringing them closer to kids, their parents and teachers.

A multinational group of paleontologists has described a new titanosaurian dinosaur, named Dreadnoughtus schrani, from Upper Cretaceous sediments in southern Patagonia, Argentina. It is the most complete giant titanosaur yet discovered, and provides new insight into the morphology and evolutionary history of these supermassive dinosaurs.

Rendering of Dreadnoughtus schrani in life. Image credit: Jennifer Hall.

“Titanosaurs are a remarkable group of dinosaurs, with species ranging from the weight of a cow to the weight of a sperm whale. But the biggest titanosaurs have remained a mystery, because, in almost all cases, their fossils are very incomplete,” said Dr Matthew Lamanna, a team member and a co-author of a paper describing Dreadnoughtus schrani in the journal Scientific Reports.

Dreadnoughtus schrani lived in temperate forests in what is now the south of South America during the Upper Cretaceous period, around 77 million years ago.

At about 26 meters long and a mass of 59.3 tons, it is the largest land animal for which a body mass can be accurately calculated.

Dreadnoughtus schrani was astoundingly huge. It weighed as much as a dozen African elephants or more than seven Tyrannosaurus rexes,” said first author Dr Kenneth Lacovara of Drexel University.

“With a body the size of a house and a weaponized tail, it would have feared nothing,” the scientist said. As a result, he chose the name Dreadnoughtus, meaning ‘fears nothing.’

Dreadnoughtus size

Dreadnoughtus schrani was substantially more massive than any other supermassive dinosaur for which mass can be accurately calculated. The lower image shows the reconstructed skeleton and body silhouette of Dreadnoughtus schrani; fossil bones that were found are shown in white; scale bar – 1 meter. Image credit: Lacovara Lab / Drexel University.

To grow as large as Dreadnoughtus schrani, a dinosaur would have to eat massive quantities of plants.

Dinosaur

An adult Dreadnoughtus schrani was likely too large to fear any predators, but it would have still been a target for scavengers after dying of natural causes or environmental disasters.

During four field seasons from 2005 to 2009, Dr Lacovara, Dr Lamanna and their colleagues from the United States, the United Kingdom and Argentina have excavated a total of 145 bones and a single tooth representing two individuals of Dreadnoughtus schrani – 115 bones and the tooth from the larger specimen and 30 bones from a second, smaller individual.

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The larger specimen is exceptionally complete, with over 70 percent of the bones, excluding the head, represented. This is far more complete than all previously discovered giant titanosaurian dinosaurs.

To better visualize the skeletal structure of the new dinosaur, the paleontologists digitally scanned all of the bones from both specimens and made a ‘virtual mount’ of the Dreadnoughtus schrani’s skeleton.

The 3D laser scans show the deep, exquisitely preserved muscle attachment scars that can provide a wealth of information about the function and force of muscles that the dinosaur had and where they attached to the skeleton – information that is lacking in many sauropods.

Efforts to understand Dreadnoughtus schrani’s body structure, growth rate, and biomechanics are ongoing areas of research within Dr Lacovara’s lab.

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Kenneth J. Lacovara et al. 2014. A Gigantic, Exceptionally Complete Titanosaurian Sauropod Dinosaur from Southern Patagonia, Argentina. Scientific Reports 4, article number: 6196; doi: 10.1038/srep06196

Dreadnoughtus
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Dreadnoughtus schrani

Dreadnoughtus[1] is a genus of giant titanosauriandinosaur. Its fossilised skeleton was found in the Upper Cretaceous of Santa Cruz province, Argentina. These rocks date from 84–66 million years ago (mya).

This is one of the largest of all known terrestrial vertebrates. It has the greatest mass (weight) of any land animal that has been calculated.[2] They used using limb bone measurements for the calculation.[3][4]

Dreadnoughtus schrani is the most complete skeleton of a large titanosaurian sauropod dinosaur.[2] Types of bones is the most important statistic. The completeness statistics for Dreadnoughtus schrani are as follows:

  • 116 bones out of ~256 in the entire skeleton (including the skull) = 45.3% complete
  • 115 bones out of ~196 in the skeleton (excluding the skull) = 58.7% complete
  • 100 types of bones out of ~142 types in the skeleton (excluding the skull) = 70.4% complete

The specimen was probably not fully grown at the time of its death. The histology of its humerus, shows a lack of an outer layer of bone found only in fully-grown vertebrates. There is a lot of fast-deposited or still-growing bone tissue. Therefore, the specimen was still growing at the time of its death.[2][5] It is unknown how large this individual would have grown if it had lived a full life.

Estimates[changechange source]

As a matter of basic science, the estimates of dimensions such as the mass (weight) of extinct animals are very rough figures. To avoid the pretence of spurious accuracy. we only give rounded figures here. Moreover. all the skeletons are incomplete, which means that even length (the easiest dimension to estimate) cannot be given exactly. Published estimates by scientists are just that: estimates. Estimation is an approximation given when information is not clear or is incomplete. It is like making an educated guess.

It is usual for estimates of mass (weight) to vary between experts. Using the same basic data, the weight of Dreadnoughtus has been estimated as:

  1. About 59.3 metric tons (65.4 short tons), or 59,291 kilograms.[2]
  2. Between 35 and 40 metric tons (39 to 44 short tons),[6]
  3. About 30 metric tons (33 short tons), based on a 20% shorter torso.[7]

There is a ~x2 difference between the heaviest and lightest estimates, and that is not at all unusual for this type of calculation.

Size[changechange source]

Dreadnoughtus dimensions [2]
Dimensionmetricimperial
Mass59,300 kilograms (59.3 t)65.4 short tons (130,800 lb)
Total length26 m85 ft
Head and neck length12.2 m40 ft
Neck-only length11.3 m37 ft
Torso and hip length5.1 m17 ft
Tail length8.7 m29 ft
Shoulder height~ 2 stories (6 m)~ 2 stories (20 ft)

Comparisons[changechange source]

SauropodGroupmetric tonsshort tons
Dreadnoughtus schraniTitanosauria59.3 [2]65.4
Brachiosaurus altithoraxBrachiosauridae56.3 [3]62.1
Turiasaurus riodevensisTuriasauria50.9 [3]56.1
Elaltitan lilloiTitanosauria42.8 [3]47.2
Futalognkosaurus dukeiTitanosauria38.1 [3]42
Giraffatitan brancaiBrachiosauridae34 [3]37.5
Diplodocus longusDiplodocidae14.8 [3]16.3

References[changechange source]

  1. meaning 'fearing nothing' and a type of warship
  2. 2.02.12.22.32.42.5Lacovara, Kenneth J.; et al. (2014). 'A gigantic, exceptionally complete titanosaurian sauropod dinosaur from southern Patagonia, Argentina'. Scientific Reports. doi:10.1038/srep06196.
  3. 3.03.13.23.33.43.53.6Benson, Roger B.J.; et al. (2014). 'Rates of dinosaur body mass evolution indicate 170 million years of sustained ecological innovation on the avian stem lineage'. PLOS Biology. doi:10.1371/journal.pbio.1001853.
  4. Campione, Nicolás E.; Evans, David C. (2012). 'A universal scaling relationship between body mass and proximal limb bone dimensions in quadrupedal terrestrial tetrapods'. BMC Biology: 15. doi:10.1186/1741-7007-10-60.
  5. Schroeter, Elena; Boles, Zachary; Lacovara, Kenneth (2011). 'The histology of a massive titanosaur from Argentina and implications for maximum size'(PDF). Journal of Vertebrate Paleontology (Program and Abstracts Supplement): p189.CS1 maint: extra text (link)
  6. Matt Wedel (11 September 2014). 'How massive was Dreadnoughtus?'. svpow. Retrieved 11 September 2014.
  7. Matt Wedel (15 September 2014). 'How long was the torso of Dreadnoughtus?'. svpow. Retrieved 15 September 2014.
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