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Dinosaur Jungle   >   Dinosaur Names   >   Maiasaura
Dinosaur Jungle   >   Dinosaur Types   >   Maiasaura

Maiasaura



dinosaur picture maiasaura

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Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Class Sauropsida
  Superorder Dinosauria
  Order Ornithischia
  Suborder Cerapoda
  Infraorder Ornithopoda
  Parvorder Iguanodontia
  Superfamily Hadrosauroidea
  Family Hadrosauridae
  Subfamily Hadrosaurinae
  Tribe Maiasaurini
  Genus Maiasaura
Maiasaura was a plant-eating dinosaur that lived in North America during the late Cretaceous period, about 80 to 65 million years ago. It was probably one of the dinosaurs that died out in the Cretaceous-Tertiary extinction, 65 million years ago.

Maiasaura adults were about 30 feet (9.1 meters) long, and weighed 3 to 4 tons. The creature could walk on two or four legs, and had no obvious defenses against predators except for its heavy muscular tail, and the fact that it lived in large herds (some herds many have consisted of as many as 10,000 individuals).

When Maiasaura was first discovered in western Montana in 1978 by "Jack" Horner and Robert Makela, a complete nesting site was found, where the dinosaurs laid their eggs, and nutured their young. The nests were mounds of mud, with a depression in the center of each mound. The eggs had been laid with great care, arranged in circles and layers within the depression, each nest containing 30 to 40 eggs, each about the size of an ostrich egg. Scientists believe that Maiasaura would probably have covered each layer of eggs with sand or earth, to protect them from predators, and to keep the eggs warm. Although the parents are not believed to have sat on the nests, it is highly likely that heat generated by rotting vegetation in the nest, contributed to warming the eggs.

The name Maiasaura means "Good Mother Lizard", and was chosen in honor of the fact that it was the first dinosaur species discovered with clear and convincing evidence that it cared for its young. This includes the fact that fossils of baby Maiasaura show that the hatchlings' legs were not fully developed, and were incapable of walking, yet also show partially worn teeth, indicating that the adults brought food to the nest.

Maiasaura has been designated the official state fossil of Montana, since 1985.

Maiasaura was the first dinosaur in space. A Maiasaura egg-shell, and a piece of bone from a baby Maiasaura, were taken into space by NASA in 1985.


Maiasaura Timeline:



Maiasaura was a herbivore (plant-eater) that lived from 80 to 65 million years ago

Maiasaura was a herbivore (plant-eater) that lived from 80 to 65 million years ago

Related Information & Resources


See Also

Maiasaura Facts

 
Here is a summary of some of the key facts about Maiasaura:
  1. Maiasaura was a genus of dinosaur.

  2. "Maiasaura" means "good mother lizard". This name was chosen by "Jack" Horner and Robert Makela in 1978, and refers to the fact this was the first dinosaur for which evidence of naturing behavior was found.

  3. Maiasaura was a member of the Ornithischia ("bird-hipped") order of dinosaurs. What this means, is that although Maiasaura was not closely related to birds, it did have similarly shaped pelvic bones.

  4. Maiasaura was a Hadrosaur (usually known as "duck-billed dinosaur") - a member of a group of related herbivorous (plant-eating) dinosaurs that were very successful in the Cretaceous period.

  5. Maiasaura lived between about 80 million years ago and 65 million years ago, during the late Cretaceous period.

  6. Maiasaura was one of the dinosaurs which died out during the Cretaceous-Tertiary mass extinction at the end of the Mesozoic Era.

  7. Maiasaura lived in North America.

  8. Maiasaura was a herbivore (plant-eater).

  9. Maiasaura was about 30 feet (9.1 meters) long.

  10. Maiasaura weighed about 3 to 4 tons.




Maiasaura Books


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Maiasaura : Dinosaurs Series
By Janet Riehecky

Brand: Childs World
Released: December 1st, 1989
Library Binding (32 pages)

Maiasaura : Dinosaurs Series
List Price: $21.36*
Lowest Used Price: $3.69*
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Description:
Maiasaura : Dinosaurs Series
  • Manufacturer: The Childs World Inc
  • Brand: Brand: Childs World
  • ISBN: 0895655438
  • EAN: 9780895655431
Details:
  • Product Category: Library Binding
  • Number of Pages: 32
  • Author: Janet Riehecky
  • Publication Date: December 1st, 1989
  • Release Date: December 1st, 1989
Physical Description:
  • Size: 10.5 Inches by 8.5 Inches by 0.5 Inches
  • Weight: 0.6 Pounds
Features:
  • Used Book in Good Condition
Click here for more information
Maiasaura (Introducing Dinosaurs)
By Susan H. Gray

The Child's World, Inc.
Kindle Edition (24 pages)

Maiasaura (Introducing Dinosaurs)
Lowest New Price: $12.79*
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Description:
Maiasaura (Introducing Dinosaurs)
  • Manufacturer: The Child's World, Inc.
Details:
  • Kindle Edition
  • Format: Kindle eBook
  • Number of Pages: 24
  • Author: Susan H. Gray
Click here for more information
The Maiasaura Nests: Jack Horner's Dinosaur Eggs (Fossil Hunters)
By Duncan Searl

Bearport Publishing
Released: August 1st, 2006
Library Binding (32 pages)

The Maiasaura Nests: Jack Horner s Dinosaur Eggs (Fossil Hunters)
List Price: $28.50*
Lowest Used Price: $7.06*
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Description:
The Maiasaura Nests: Jack Horner's Dinosaur Eggs (Fossil Hunters)
  • Manufacturer: Bearport Publishing
  • Brand: Bearport Publishing
  • ISBN: 1597162574
  • EAN: 9781597162579
Details:
  • Product Category: Library Binding
  • Format: Illustrated
  • Edition: Illustrated
  • Number of Pages: 32
  • Author: Duncan Searl
  • Publication Date: August 1st, 2006
  • Release Date: August 1st, 2006
Physical Description:
  • Size: 10.18 Inches by 8.18 Inches by 0.34 Inches
  • Weight: 0.7 Pounds
Features:
  • Used Book in Good Condition
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Maiasaura: The Good Mother Dinosaur (Dinosaur Discovery Era)
By Elizabeth J. Sandell

Bancroft Sage Pub
Paperback (32 pages)

Maiasaura: The Good Mother Dinosaur (Dinosaur Discovery Era)
Lowest New Price: $10.00*
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Description:
Maiasaura: The Good Mother Dinosaur (Dinosaur Discovery Era)
  • Manufacturer: Bancroft Sage Pub
  • ISBN: 0944280234
  • EAN: 9780944280232
Details:
  • Paperback
  • Number of Pages: 32
  • Author: Elizabeth J. Sandell
Physical Description:
  • Size: 12.0 Inches by 9.0 Inches by 0.25 Inches
  • Weight: 0.3747858454 Pounds
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Maiasaura (21st Century Junior Library: Dinosaurs)
By Jennifer Zeiger

Cherry Lake Publishing
Kindle Edition (24 pages)

Maiasaura (21st Century Junior Library: Dinosaurs)
Lowest New Price: $12.79*
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Description:
Maiasaura (21st Century Junior Library: Dinosaurs)
  • Manufacturer: Cherry Lake Publishing
Details:
  • Kindle Edition
  • Format: Kindle eBook
  • Number of Pages: 24
  • Author: Jennifer Zeiger
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Maiasaura and Other Dinosaurs of the Midwest (Dinosaur Find)
By Dougal Dixon

Brand: Picture Window Books
Released: September 1st, 2006
Library Binding (24 pages)

Maiasaura and Other Dinosaurs of the Midwest (Dinosaur Find)
List Price: $26.65*
Lowest Used Price: $5.95*
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Description:
Maiasaura and Other Dinosaurs of the Midwest (Dinosaur Find)
  • Manufacturer: Picture Window Books
  • Brand: Brand: Picture Window Books
  • ISBN: 1404827498
  • EAN: 9781404827493
Details:
  • Product Category: Library Binding
  • Number of Pages: 24
  • Author: Dougal Dixon
  • Publication Date: September 1st, 2006
  • Release Date: September 1st, 2006
Physical Description:
  • Size: 9.9999999898 Inches by 9.9999999898 Inches by 0.25196850368 Inches
  • Weight: 0.76 Pounds
Features:
  • Used Book in Good Condition
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Mayasauria/Maiasaura (Dinosaur Series) (Spanish Edition)
By Janet Riehecky

The Childs World Inc
Library Binding (32 pages)

Mayasauria/Maiasaura (Dinosaur Series) (Spanish Edition)
List Price: $21.36*
Lowest Used Price: $7.44*
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Description:
Mayasauria/Maiasaura (Dinosaur Series) (Spanish Edition)
  • Manufacturer: The Childs World Inc
  • ISBN: 1567661475
  • EAN: 9781567661477
Details:
  • Product Category: Library Binding
  • Number of Pages: 32
  • Author: Janet Riehecky
Physical Description:
  • Size: 10.5 Inches by 8.25 Inches by 0.5 Inches
Click here for more information
Looking At...Maiasaura: A Dinosaur from the Cretaceous Period (The New Dinosaur Collection)
By Jenny Vaughan

Brand: Gareth Stevens Pub
Library Binding (24 pages)

Looking At...Maiasaura: A Dinosaur from the Cretaceous Period (The New Dinosaur Collection)
List Price: $19.93*
Lowest Used Price: $3.39*
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Description:
Looking At...Maiasaura: A Dinosaur from the Cretaceous Period (The New Dinosaur Collection)
  • Manufacturer: Gareth Stevens Pub
  • Brand: Brand: Gareth Stevens Pub
  • ISBN: 0836810856
  • EAN: 9780836810851
Details:
  • Product Category: Library Binding
  • Number of Pages: 24
  • Author: Jenny Vaughan
Physical Description:
  • Size: 10.0 Inches by 9.0 Inches by 0.5 Inches
  • Weight: 0.6 Pounds
Features:
  • Used Book in Good Condition
Click here for more information
Maiasaura: And Other Duck-Billed Plant-Eaters (Prehistoric World)
By Virginia Schomp

Cavendish Square Publishing
Released: January 1st, 2004
Library Binding (31 pages)

Maiasaura: And Other Duck-Billed Plant-Eaters (Prehistoric World)
List Price: $30.93*
Lowest New Price: $19.42*
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Description:
Maiasaura: And Other Duck-Billed Plant-Eaters (Prehistoric World)
  • Manufacturer: Cavendish Square Publishing
  • Brand: Cavendish Square Publishing
  • ISBN: 0761415459
  • EAN: 9780761415459
Details:
  • Product Category: Library Binding
  • Edition: Illustrated
  • Number of Pages: 31
  • Author: Virginia Schomp
  • Publication Date: January 1st, 2004
  • Release Date: January 1st, 2004
Physical Description:
  • Size: 10.24 Inches by 10.14 Inches by 0.43 Inches
  • Weight: 0.94 Pounds
Features:
  • Used Book in Good Condition
Click here for more information
Maiasaura : Dinosaurs Series by Janet Riehecky (1989-12-03)
Childs World
School & Library Binding

Maiasaura : Dinosaurs Series by Janet Riehecky (1989-12-03)
Lowest Used Price: $18.19*
In Stock.*
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Description:
Maiasaura : Dinosaurs Series by Janet Riehecky (1989-12-03)
  • Manufacturer: Childs World
Details:
  • Product Category: School & Library Binding
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