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Hadrosaurus
Scientific Classification |
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Arguably nomen dubium |
Some scientists consider this a nomen dubium - a scientific name of unknown or doubtful application |
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Superfamily |
Hadrosauroidea |
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Hadrosaurus was a herbivore (plant-eater) that lived in North America
during the Cretaceous period
between about 80 and 75 million years ago.
An adult Hadrosaurus has been estimated to be about 30 feet (9.1 meters)
long and weigh around 7 tons. Like other duck-billed dinosaurs, Hadrosaurus is
believed to have generally been bipedal, but could walk on 4 limbs when feeding.
The story of the discovery of Hadrosaurus is quite interesting. The first
fossilized
bones of the animal were discovered by
John Estaugh Hopkins in 1838 near Haddonfield,
New Jersey,
who then displayed them in his home.
These bones were seen by William Parker Foulke in 1858, who returned to the
excavation site (now a national historic landmark - the
"Hadrosaurus Foulkii Leidy Site") and found additional bones
in conjunction with a paleontologist, Joseph Leidy. Leidy subsequently named
the species Hadrosaurus foulkii in honor of his collaborator.

Leidy wrote a description of the Hadrosaurus, complete with illustrations, in 1860,
but the American Civil War delayed publication until 1865. Leidy, contrary to prevailing
views at the time, correctly reconstructed the skeleton as bipedal, and a complete
the skeleton was reconstructed in this form in 1868 - the first mounted dinosaur
skeleton.

It should be noted however, that only one skeleton of Hadrosaurus has ever been found,
and this specimen lacks a skull (among other bones). Reconstructions of the animal
are therefore usually done using skulls of related species. Because of the lack of
specimens, which makes it difficult to perform comparisons with other species,
many scientists consider Hadrosaurus to be a "nomen dubium" - a dubious name.
Hadrosaurus was a herbivore (plant-eater) that lived from 80 to 75 million years ago
Related Information & Resources
See Also
Hadrosaurus Facts
Here is a summary of some of the key facts about Hadrosaurus:
- Hadrosaurus was a genus of dinosaur. Hadrosaurus is considered by some to be a "nomen dubium" (a scientific name of unknown or doubtful application) - because only a few fossils have been found (one very incomplete skeleton missing a skull and many other bones), and, as a result, it is impossible to compare it to its relatives for classification purposes.
- "Hadrosaurus" means "sturdy lizard".
- Hadrosaurus was a member of the Ornithischia ("bird-hipped") order of dinosaurs. What this means, is that although Hadrosaurus was not closely related to birds, it did have similarly shaped pelvic bones.
- Hadrosaurus 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.
- Hadrosaurus lived between about 80 million years ago and 75 million years ago, during the late Cretaceous period.
- Hadrosaurus lived in North America.
- Hadrosaurus was a herbivore (plant-eater).
- Hadrosaurus was about 30 feet (9.1 meters) long.
- Hadrosaurus weighed about 7 tons.
- Hadrosaurus is the official state dinosaur of New Jersey.
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Hadrosaurus Books Here are some books from Amazon.com:
Disclosure: Products details and descriptions provided by Amazon.com. Our company may receive a payment if you purchase products from them after following a link from this website.
By Rob Shone
PowerKids Press Released: August 30th, 2009 Library Binding (32 pages)
 | Lowest New Price: $28.50* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Hadrosaurus: The Duck-billed Dinosaur (Graphic Dinosaurs)- Manufacturer: Powerkids Pr
- Brand: PowerKids Press
- ISBN: 1435885910
- EAN: 9781435885912
Details:- Product Category: Library Binding
- Format: Illustrated
- Edition: Illustrated
- Number of Pages: 32
- Author: Rob Shone
- Publication Date: August 30th, 2009
- Release Date: August 30th, 2009
Physical Description:- Size: 10.75 Inches by 9.0 Inches by 0.25 Inches
- Weight: 0.9 Pounds
Click here for more information |
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By CAMILLE JENKINS
Independently published Released: September 23rd, 2020 Paperback (58 pages)
 | Lowest New Price: $5.99* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Hadrosaurus Coloring Book- Manufacturer: Independently published
- EAN: 9798689621234
Details:- Paperback
- Number of Pages: 58
- Author: CAMILLE JENKINS
- Publication Date: September 23rd, 2020
- Release Date: September 23rd, 2020
Physical Description:- Size: 11.0 Inches by 8.5 Inches by 0.14 Inches
Click here for more information |
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By Nice and Simple Books
Independently published Released: February 19th, 2020 Paperback (105 pages)
 | Lowest New Price: $6.00* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Hadrosaurus Notebook: Dinosaur-themed college ruled journal- Manufacturer: Independently published
- EAN: 9798615713828
Details:- Paperback
- Number of Pages: 105
- Author: Nice and Simple Books
- Publication Date: February 19th, 2020
- Release Date: February 19th, 2020
Physical Description:- Size: 11.0 Inches by 8.5 Inches by 0.24 Inches
Click here for more information |
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Hadrosaurus Toys Here are some toys/games from Amazon.com:
Disclosure: Products details and descriptions provided by Amazon.com. Our company may receive a payment if you purchase products from them after following a link from this website.
ArtCreativity
 | Lowest New Price: $17.97* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: ArtCreativity Soft Brachiosaurus Dinosaur Toy for Kids, Super Realistic and Soft Touch 15 Inch Dinosaur Figurine, Great Educational Learning Resource, Dinosaur Gift and Party Favors for Boys and Girls- Manufacturer: ArtCreativity
- Brand: ArtCreativity
- UPC: 810031542451
- EAN: 0810031542451
- PartNumber: AC-896
Features:- SUPER-REALISTIC LOOK: An awe-inspiring replica of one of the most iconic dinosaurs to ever roam the planet! This 15” soft brachiosaurus toy is a great treat for dino lovers. Designed with a realistic touch of dark green-grey color, it’s a recipe for immersive imaginative play.
- SOFT AND BENDABLE: Treat little ones to hours of prehistoric fun with a dinosaur toy that bends to their every desire. We’ve used soft, bendable materials to bring this realistic dinosaur figurine to life. This means safe and interactive play to keep kids busy and smiling.
- GREAT EDUCATIONAL TOOL: Make that science lesson stick! This brachiosaurus, with its realistic look, is one of the best dinosaur learning toys. Perfect for preschool and grade school, it’s an attention-grabbing learning resource to school kids on the prehistoric wonders.
- GREAT GIFT IDEA: Birthday, holiday, or anything in between, this soft-touch dinosaur toy makes an awesome treat. It’s also great as a contest prize for boys and girls, and can even be gifted as giggle-sparking dinosaur birthday party favors. Ideal for ages 3+
- BUY RISK-FREE: We fully stand behind our products with a total satisfaction and 100% money-back guarantee. Not satisfied with this soft brachiosaurus dinosaur? We’ll send you a quick replacement or issue a full refund. Click ‘Add to Cart’ now to get the fun started risk-free!
Click here for more information |
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Dan&Darci Toy
 | List Price: $24.99* Lowest New Price: $16.99* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Dig a Dozen Dino Egg Dig Kit - Easter Egg Dinosaur Toys for Kids - Dig up 12 Eggs & Discover Surprise Dinosaurs. Science STEM Activities - Educational Gifts for Boys & Girls Age 3-5 5-7 8-12 Year Old- Manufacturer: Dan&Darci
- Brand: Dan&Darci
- Model: SG_B07H9GY33H_VR3
- UPC: 855831008035
- EANs: 6015822652621, 0855831008035, 6015834048092, 6015825720723
- PartNumber: SG_B07H9GY33H_VR3
Details:Physical Description:- Size: 3.99999999592 Inches by 13.99999998572 Inches by 5.511811018 Inches
Features:- Dig up 12 dino eggs & discover 12 unique dinosaur models: Feel like a real paleontologist excavating up unique toy dinosaurs from the dino eggs. Find a T-rex, Dilophosaurus, Ankylosaurus and much more! Once dug up, find the appropriate card describing the history and characteristics of the dinosaur.
- Kit includes: 12 Dino Eggs (with a unique toy dinosaur in each), 12 Chisel/Brushes, 12 Instruction Guides, and 12 full-colored beautiful learning cards - one for each dino. It all comes packaged in a sleek display box. Includes everything needed for the young scientist to excavate the dinos with ease, and gain a deeper understanding of them.
- 12 full-color dinosaur learning cards: Includes 12 beautiful cards, each describing the history of a different dinosaur. After digging up a dino, try to match up the appropriate card to your dinosaur and learn more about it.
- A fun and educational gift for all ages: It's not often that a science project can be fun and engaging, but this kit achieves both! Great set for individual play or as a group activity. It fascinates children as soon as they pull it out of the box and is a perfect STEM project. It fosters a love for science and paleontology in a fun and exciting way.
Click here for more information |
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Jurassic World Toys Gray Accessory
![Jurassic World Real Feel Mosasaurus [Amazon Exclusive]](https://m.media-amazon.com/images/I/41ScsEjwwjL._SL160_.jpg) | Lowest New Price: $29.99* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Jurassic World Real Feel Mosasaurus [Amazon Exclusive]- Manufacturer: Mattel
- Brand: Jurassic World Toys
- Model: FNG24
- UPCs: 615912348593, 887961590678
- EANs: 7426911507194, 0615912348593, 0887961590678
- PartNumber: FNG24
Details:- Product Category: Accessory
Physical Description:- Size: 8.0 Inches by 5.0 Inches by 24.0 Inches
- Weight: 1.0 Pounds
- Color: Gray
Features:- Get ready for thrilling action and adventure with Jurassic World!
- Making a bigger splash than ever, Mosasaurus, the colossal swimming creature, is back again!
- Mosasaurus will thrill fans with its massive size and movie-inspired design!
- Authentic textured skin, realistic sculpting and articulation make colossal creature come to life.
- Colors and decorations may vary.
Click here for more information |
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Prextex Unknown Binding
 | List Price: $29.99* Lowest New Price: $25.99* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: Pack of 12 Toy Dinosaurs Figures with Interactive Dinosaur Sound Book - Realistic Looking Dino Toys for Boys and Girls 3 Years Old & Up- Manufacturer: Prextex
- Brand: Prextex
- Model: RXZER23
- UPC: 810031583980
- EAN: 0810031583980
- PartNumber: PR83980
Details:- Product Category: Unknown Binding
Physical Description:- Size: 7.0 Inches by 8.0 Inches by 3.0 Inches
- Weight: 0.625 Pounds
Features:- 12 REALISTIC JURASSIC DINOSAURS - This Prextex jurassic dinosaur toy set includes 12 dinosaur animal figures, each measuring 7 inches from nose to tail. They are life-like and great for boys and girls ages 3 years old and up.
- SOUND BOOK WITH DINOSAUR NAMES AND SOUNDS - Discover and learn the names and rumbling sounds of each of the 12 dinosaurs featured in this book by pressing the button on the right side that corresponds to the dinosaur pictured.
- FUN AND EDUCATIONAL - This interactive sound book is fun to play with, while providing knowledge and fun facts about these prehistoric beasts. Each page has fun facts and a little piece of history about each dinosaur.
- PERFECT GIFT FOR ALL AGES - Don't look any further for birthday party gifts, stocking stuffers, Christmas gifts, or dinosaur-themed party supplies. This will be the gift that will make your little ones remember the moment.
- BEAUTIFUL PACKAGING FOR GIFTING - This set of dinosaurs, with its sound book is nicely packaged in a beautifully designed box that's perfect for wrapping and gift-giving.
Click here for more information |
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LEGO Multicolor Toy
 | Lowest New Price: $136.60* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: LEGO Jurassic World Indominus rex vs. Ankylosaurus 75941 Awesome Dinosaur Building Toy for Kids, Featuring Jurassic World Character Minifigures for Hours of Creative Fun (537 Pieces)- Manufacturer: LEGO
- Brand: LEGO
- Model: 6303674
- UPC: 673419326506
- EAN: 0673419326506
- PartNumber: 75941
Details:Physical Description:- Size: 3.09 Inches by 21.26 Inches by 11.1 Inches
- Color: Multicolor
Features:- Reimagine scenes from the Jurassic World movie with this Indominus rex vs. Ankylosaurus (75941) building toy for kids, featuring 2 awesome dinosaurs, gyrosphere deployment station and more
- Children can role-play thrilling action with 5 minifigures – including Owen Grady, Claire Dearing and brothers Gray and Zach Mitchell – plus posable Indominus rex and Ankylosaurus dinosaur figures
- There are so many ways to play with the gyrosphere station, which features a ticket booth, turnstile and gyrosphere-launch function, plus a jungle build with trees to knock down with the Ankylosaurus’s swiping tail
- A cool birthday, holiday or surprise present, this 537-piece LEGO playset offers a fun, rewarding building challenge and creative solo- or group-play experience for boys and girls aged 8 and up
- The gyrosphere station measures over 4” (12cm) high, 10” (27cm) wide and 10” (27cm) deep – and this action-packed dinosaur adventure set combines brilliantly with other LEGO Jurassic World sets for extra creative fun
Click here for more information |
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TEMI Figure W Toy
 | List Price: $32.99* Lowest New Price: $16.99* In Stock.* *(As of 01:33 Pacific 15 May 2022 More Info)
Click Here | Description: TEMI Dinosaur Toys for Kids 3-5 with Activity Play Mat & Trees, Educational Realistic Dinosaur Play Set to Create a Dino World Including T-Rex, Triceratops, Velociraptor, Great Gift for Boys & Girls- Manufacturer: TEMI
- Brand: TEMI
- Model: B07MYTBV6N
- UPCs: 722020891856, 742484902318
- EANs: 0722020891856, 0742484902318
- PartNumber: S500-28
Details:Physical Description:- Size: 4.7 Inches by 9.7 Inches by 7.6 Inches
- Color: Figure W
Features:- JURASSIC ADVENTUROUS JOURNEY - Are you concerned about your kid getting addicted to gadgets? Give them the chance to spend long hours exploring the dinosaur world. This is a complete set of 9 dinosaur figures, as well as a compelling Dino Park mat that can hone their exploration skills to these prehistoric creatures.
- ULTIMATE REALISTIC DINOSAURS – This interactive dino playset includes Tyrannosaurus Rex, Giganotosaurus, Therizinosaurus, Stegosaurus, Triceratops, Velociraptor, Acrocanthosaurus, Brachiosaurus, Dimetrodon in total 9 dinosaurs. Made of durable PVC, plus hand-painted craft makes them more durable and realistic. LARGE dinosaur figures of all types ensure safety for kids, eliminating choking.
- ACTIVITY PLAY MAT –Compare with competition, our rug is made of soft non-woven fabrics texture instead of thin PVC. This carpet shows us an interesting cartoon dinosaur park with a bright color. It is large enough for 2 to 4 players to spend the quality time together. Activity mat dimension: 31.5" x 27.6".
- EDUCATION & DEVELOPMENT PLAY SET - The realistic dinosaur figures will spark hours of imaginative play. Make your kids away from electronics and let your child's imagination run. It is an excellent educational toy that will teach your children cooperation with their friends or will keep them creatively entertained in their own room!
- NEVER GO WRONG AS A GIFT - All dinosaurs can be stored in one study carrying case with a handle. It is perfect for birthday gift, Christmas, holiday or impulse gift. Meantime, it can be played at home, outdoors or as part of a science project at school. The vibrant colors, the great attention to detail and the realistic moves make this dinosaur play set will be your first choice of gift to a dino enthusiast.
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