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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 CAMILLE JENKINS
Independently published Released: September 23rd, 2020 Paperback (58 pages)
 | Lowest New Price: $7.14* In Stock* *(As of 13:20 Pacific 14 Feb 2025 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 Rob Shone
PowerKids Press Released: August 30th, 2009 Library Binding (32 pages)
 | Lowest New Price: $30.27* In Stock* *(As of 13:20 Pacific 14 Feb 2025 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 Darlene R. Stille
Rourke Pub Group Released: January 1st, 2007 Paperback (24 pages)
 | Lowest Used Price: $8.75* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Hadrosaurus- Manufacturer: Rourke Pub Group
- ISBN: 1600443346
- EAN: 9781600443343
Details:- Paperback
- Number of Pages: 24
- Author: Darlene R. Stille
- Publication Date: January 1st, 2007
- Release Date: January 1st, 2007
Physical Description:- Size: 10.5 inches by 7.75 inches by 0.25 inches
- Weight: 0.2 pounds
Click here for more information |
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By Leigh Rockwood
PowerKids Press Released: August 30th, 2011 Paperback (24 pages)
 | Lowest New Price: $9.25* Temporarily out of stock. Order now and we'll deliver when available. We'll e-mail you with an estimated delivery date as soon as we have more information. Your account will only be charged when we ship the item.* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Hadrosaurus (Dinosaurs Ruled!)- Manufacturer: Powerkids Pr
- Brand: PowerKids Press
- ISBN: 1448850967
- EAN: 9781448850969
Details:- Paperback
- Number of Pages: 24
- Author: Leigh Rockwood
- Publication Date: August 30th, 2011
- Release Date: August 30th, 2011
Physical Description:- Size: 8.75 inches by 5.75 inches by 0.25 inches
- Weight: 0.4 pounds
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.
WLNTDOLA
 | Lowest New Price: $9.99* Usually ships within 2 to 3 weeks* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: PNSO Tsintaosaurus Dinosaur Figure Hadrosaurus Collector PVC Animal Decor Home Decor Gift for Adult- Manufacturer: WLNTDOLA
- Brand: WLNTDOLA
- Model: PS025
- PartNumber: PS025
Physical Description:- Size: 1.0 inches by 1.0 inches by 1.0 inches
- Color: Tsintaosaurus
Features:- ??Size?4 x 2.5 in / 10.3 x 6.5 cm..
- ??Package Include?1 x Tsintaosaurus Figure, 1 x Original Box.
- ??Feature?Dinosaur Figure, Animal Collector, Decoration Scientific Art Model.
- ??Material? Made of PVC, Safe and Eco-friendly.
- ??After-Sales Service?WLNTDOLA provides 100% pre-sales and after-sales service satisfaction, returns within 30 days after delivery, and 1-year after-sales service. Any questions please feel free to contact us, we will definitely respond within 24 hours.
Click here for more information |
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Generic
 | Lowest New Price: $7.99* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Dinosaur Miniatures for DND Pathfinder RPG Unpainted Resin 28mm-32mm 3D Printed (Hadrosaurus - 2" - Large)Features:- High-Quality Resin: Our miniatures are expertly 3D printed using premium resin material, ensuring durability and intricate details that truly capture the essence of Dinosaurs.
- Perfect for RPGs: Whether you’re a player or a dungeon master, these resin 3D printed miniatures add depth and immersion to your tabletop adventures, making encounters with Dinosaurs even more thrilling.
- Intricate Details: Every miniature is designed with meticulous attention to detail, showcasing the unique characteristics and features of each Dinosaur type.
- Paintable Surface: The smooth surface of our resin miniatures allows for easy painting, enabling you to customize and personalize your Dinosaur figures according to your preferences.
- Check out all of our 3D printed handmade DND miniatures at our Amazon Handmade Storefront: https://www.amazon.com/stores/page/250808B5-6DEC-475D-A864-0D109D8ACEE9
Click here for more information |
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OuMuaMua Yellow Toy
 | List Price: $13.99* Lowest New Price: $12.99* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: OuMuaMua Dinosaur Toys, Plastic Dinosaur Figure Set, Ideal Education Toys for Kids and Toddler, Including T-Rex, Stegosaurus, Monoclonius, 6 to 7 Inch Large Size, 6 Pack- Manufacturer: 6 Dinosaur
- Brand: OuMuaMua
- PartNumber: B07VYPDFJ7
Details:Physical Description:- Size: 6.0 inches by 6.0 inches by 6.0 inches
- Weight: 0.54895103238 pounds
- Color: Yellow
Features:- REALISTIC DINOSAUR FIGURES: These large size realistic dinosaur figures will spark hours of imaginative play for children. Dinosaur species including T-rex, Stegosaurus, Monoclonius, Acanthosis, Ceratosaurus, and Brachiosaurus, are durable enough to be used indoors or out. Different species of dinosaurs in various poses will provide you with a realistic experience
- DURABILITY DINOSAUR TOYS: The unique dinosaur toy set with vibrant colors is made from durable, flexible, long-lasting vinyl. All dinosaurs are hand-painted with full details. Their uniquely textures and richly painted details bring them to life and help inspire creativity in kids
- LARGE SIZE DINOSAUR FIGURES: 6pcs set of dinosaur toys are approximately 6 - 7 inches in length, larger than most of the other similar toys. Kids will enjoy playing with these realistic-looking dinosaurs. It’s funny and educational for both boys and girls
- PERFECT GIFT FOR KIDS: Are you looking for a perfect gift for your kids? Our dinosaur figure set will be a unique gift idea. The dinosaur toys are great as birthday cake toppers, dinosaur theme party toys, dinosaur show decorations, bath toys, educational purposes, learning toys or rewards, Christmas gifts or party favors
- SHOP WITH CONFIDENCE: We strive to offer top-notch products and unparalleled service. Should you have any issues or questions, please reach out to us.
Click here for more information |
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Mattel Multicolor Toy
 | Lowest New Price: $19.95* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Mattel Jurassic World Dominion Roar Strikers Dinosaur Action Figure with Roaring Sound & Attack Action, Ankylosaurus Dino Toy Includes Digital Play- Manufacturer: Mattel
- Brand: Mattel
- Model: HDX36
- UPC: 194735034048
- EAN: 0194735034048
- PartNumber: HDX36
Details:Physical Description:- Size: 6.6929 inches by 2.7559 inches by 10.2362 inches
- Weight: 0.7605948039 pounds
- Color: Multicolor
Features:- Jurassic World: Dominion brings new thrills and adventures to dinosaur lovers. At about 13 in long, this Roar Strikers Ankylosaurus figure inspired by the movie will expand the definition of dinosaur fun!
- This action figure has a big ROARING sound and a tail WHIP attack action, for realistic battle play. It's easy for kids to active the features – they just press down on the hip area
- See dinosaur play get REAL! Find the hidden DNA code and scan it with any smart device to initiate Augmented Reality options in the free Jurassic World Facts app. Smart device not included
- AR lets kids study the dinosaur in the lab with fun visual learning and explore different modes, like thermal and x-ray! Then, take it to the next level and bring dinosaurs into our world through AR -make the dinosaur appear in any room. RUN!
- Kids can collect all the Roar Strikers dinosaurs for rowdy, action-filled play. ROAR! Chomp! Whip!
- Makes a great gift for any dinosaur enthusiast, especially Jurassic World: Dominion fans.
Click here for more information |
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TQU Toy
 | Lowest New Price: $9.99* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: 13 Pcs Dinosaur Alphabet Learning Toys for Toddlers 3-6, Montessori Educational Toys Gifts for 3 4 5 6 Year Old Boy Girl, Magnetic Toys, Wooden Stacking Building Toys Fine Motor Toys for Kids- Manufacturer: TQU
- Brand: TQU
- Model: ZMPP-KYDD-BD
- PartNumber: ZMPP-KYDD-BDZQ
Details:Physical Description:- Size: 0.6 inches by 7.9 inches by 6.3 inches
Features:- ?Letter Matching Set?The dinosaur learning toys come in a great value set with 26 letters on 13 double sides dinosaurs. There are 6 types of dinosaurs: Tyrannosaurus Rex, Brontosaurus, Triceratops, Plesiosaur, Pterosaur, and Hadrosaurus. Each dinosaur has two pairs of uppercase and lowercase letters.
- ?Funny Magnetic Toys?Each letter matching combination has a pair of built-in magnetic blocks, which are very strong and can be easily fixed, allowing children to experience the joy of magnetic toys! The outer layer of the magnetic block is coated to ensure that it does not easily fall out, making it safer for children to play with magnetic toys.
- ?Stacking Building Toy?Each dinosaur has a different shape and weight, making stacking games more challenging. It is also a great activity for parent-child interaction.
- ?Material?Dinosaur building blocks are made of high quality wood and coated with eco-friendly paint. It is natural, safe, non-toxic and exquisitely crafted. Hand-polishing process ensures a smooth, burr-free surface for better child play.
- ?Great Gift Choice?The dinosaur magnetic toy comes with a beautiful gift box. It is a great gift for Christmas, birthdays, Halloween gifts, or you can take it with you as a travel toy for your child. It will keep your child entertained for hours.
Click here for more information |
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Boley Assorted Toy
 | Lowest New Price: $24.99* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Boley 12 Pack 9-Inch Educational Dinosaur Toys - Kids Realistic Toy Dinosaur Figures for Cool Kids and Toddler Education! (T-Rex, Triceratops, Velociraptor, and More!)- Manufacturer: Boley
- Brand: Boley
- Model: 084495500023
- UPC: 084495500023
- EAN: 0084495500023
- PartNumber: 084495500023
Details:Physical Description:- Size: 4.0 inches by 9.0 inches by 2.5 inches
- Weight: 0.15 Pounds
- Color: Assorted
Features:- DURABILITY: 12 unique dinosaur with vibrant colors. Made from durable, flexible, long-lasting vinyl Kids will enjoy hours of Imaginative Play with realistic-looking dinosaurs. Fun and educational for both boys and girls alike. Just right for a school / science project or report.
- MATERIAL: Introduce your child to the wonderful world of dinosaurs, and turn their little world into Jurassic period with these realistic dinosaurs! Made from durable,nontoxic, bpa free high-quality plastic, strong enough to withstand hours of rugged play.
- IMAGINATIVE PLAY: These large realistic dinosaur figures will spark hours of imaginative play. Durable enough to be used indoors or out, their uniquely molded textures and richly painted details bring them to life and help inspire creativity for kids.
- MEASUREMENT: A dino lovers delight! Large 9" Dinos. Travel through time with realistically detailed dinosaur friends that inspire imaginative play and curiosity about science and history.
- GIFT: Fun dino toys tested and approved by real kids. Great for stocking stuffers, party favors, birthday party games, educational purposes, party decoration, party favors, handouts or rewards. Ideal party favor or gift for a dinosaur themed birthday party.
Click here for more information |
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Boley 18 Pack Unknown Binding
 | Lowest New Price: $19.67* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Boley 18 Pack 4" Dinosaur Toy Set - Educational Dinosaur and Mammoth Figures - Realistic Toys for Kids - Perfect for Learning and Play - Great Birthday Party Favors - Safe & Durable - Ages 3+- Manufacturer: Boley
- Brand: Boley
- Model: 1251A
- UPC: 084495533342
- EAN: 0084495533342
- PartNumber: 1251A
Details:- Product Category: Unknown Binding
Physical Description:- Weight: 1.13317602668 Pounds
- Color: 18 Pack
Features:- WHAT'S INSIDE: Boley's 18 Pack Authentic Dinosaur Set features 18 intricately detailed dinosaur and mammoth figurines! These sturdy plastic dinosaurs are designed to endure repeated play, while their compact size is perfect for little hands.
- PERFECT FOR GROWING MINDS: Each dinosaur and mammoth figurine in our playset has its name printed on the belly, helping your child learn and practice dinosaur names. This set is excellent for boosting vocabulary and understanding of the prehistoric era!
- ENCOURAGES CREATIVE PLAY: Our dinosaur toys inspire imaginative play and storytelling. Kids can create their own dinosaur adventures, enhancing their creativity and cognitive development.
- HIGH-QUALITY MATERIALS: Made from durable, non-toxic plastic, our dinosaur figurines are built to last. They are perfect for both indoor and outdoor play.
- IDEAL GIFT: This dinosaur toy set makes a great gift for birthdays, holidays, or any special occasion. It’s also perfect for party favors, educational purposes, and as a fun addition to any child’s toy collection.
- SAFE AND CHILD FRIENDLY: At Boley, child safety is our highest priority. That's why our entire production process is rigorously monitored by the most reputable organizations of child safety standards, including ASTM, Sedex, ICTI Care, and more.
- EXPLORE MORE: Visit our Boley store on Amazon for a wide range of children's educational toys. From dinosaurs to dollhouses, Boley is where the action is!
Click here for more information |
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Gemini&Genius
 | Lowest New Price: $29.99* In Stock* *(As of 13:20 Pacific 14 Feb 2025 More Info)
Click Here | Description: Gemini&Genius Giganotosaurus Action Figure Toy, G-Rex Dinosaur with Moveable Jaw, Beautiful and Accurate Sculptures of Dino Toy Figure, Perfect for Gift, Collection, Display & Play for Kids- Manufacturer: Gemini&Genius
- Brand: Gemini&Genius
- Model: T5004
- PartNumber: T5004
Physical Description:- Size: 5.7086614115 inches by 12.7952755775 inches by 2.755905509 inches
- Weight: 1.048959442596 Pounds
- Color: Giganotosaurus
Features:- Welcome to the finest collection series: This is a collection series of very delicate, very beautiful prehistoric animals that are both toys and the best collection on display and gift. Color box Giganotosaurus dioramas- a perfect start to your collection!
- Unrestricted fun: The Giganotosaurus Action Toy Figure For Dino lovers of all ages, for boys and girls, for indoors and outdoors; toys, games and beautiful decoration to delight and inspire fun play for children. A nature encyclopedia in hand.
- Learn & play: Gemini&Genius animal figures are modeled in the finest details which enables children to learn about animals from all over the world, from ancient to present, to make children love nature and history.
- Quality and safety: Product safety is our top priority All G&G’s products are tested by SGS and other accredited test laboratories.
- Excellent workmanship and durability: Through the use of high-quality materials, combined with the latest production methods. We use every scrap of animal hair to bring animal lovers back to the wilderness of ancient times. Bring life back to the most amazing animals once inhabited on Earth.
- Scientifically Accurate Figurines: G-Rex action figure toy is a static and solid dinosaur model, realistic action figure with moveable mouth, standing well, The dinosaur models are reconstructed by using both science and art method.
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