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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: $32.17* Usually ships within 6 to 7 days.* *(As of 17:36 Pacific 25 Jan 2023 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 Paperback (24 pages)
 | List Price: $7.95* Lowest New Price: $4.00* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: Hadrosaurus- Manufacturer: Rourke Pub Group
- ISBN: 1600443346
- EAN: 9781600443343
Details:- Paperback
- Number of Pages: 24
- Author: Darlene R. Stille
Physical Description:- Size: 10.5 Inches by 7.75 Inches by 0.25 Inches
Click here for more information |
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By Leigh Rockwood
PowerKids Press Released: August 30th, 2011 Paperback (24 pages)
 | List Price: $9.25* Lowest New Price: $8.54* 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 17:36 Pacific 25 Jan 2023 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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By CAMILLE JENKINS
Independently published Released: September 23rd, 2020 Paperback (58 pages)
 | Lowest New Price: $5.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 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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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.
PREXTEX Multi_color Unknown Binding
 | List Price: $29.99* Lowest New Price: $23.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: PREXTEX Dinosaur Toys for Kids 3-5+ (12 Plastic Dinosaur Figures & Interactive Dinosaur Book with Sound) Dinosaur Gift Set for Toddlers Learning & Development (Boys & Girls)- Manufacturer: Prextex
- Brand: PREXTEX
- Model: RXZER23
- UPC: 810031583980
- EAN: 0810031583980
- PartNumber: PR83980
Details:- Product Category: Unknown Binding
Physical Description:- Size: 5.118110231 Inches by 5.118110231 Inches by 5.118110231 Inches
- Weight: 0.625 Pounds
- Color: Multi_color
Features:- 12 Realistic Jurassic Dinosaurs - This interactive sound book 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 best dinosaur toys for 3 years olds gift that will make your little ones remember the moment.
- Beautiful Packaging for Gifting - This set of dinosaur kid toys and sound book is nicely packaged in a beautifully designed box that's perfect for wrapping and gift-giving.
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EOIVSH Pterosaur & Allosaurus Toy
 | Lowest New Price: $17.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: 2 Pack Dinosaur Toy Pterosaur & Allosaurus, Realistic Educational Plastic Dinosaur Figures, Plastic Wildlife Animal Model Figurines for Funny Collection, Birthday Gifts, Party Favor- Manufacturer: EOIVSH
- Brand: EOIVSH
- UPC: 760385073623
- EAN: 0760385073623
- PartNumber: 028-LargeDinosaur2Pack
Details:Physical Description:- Color: Pterosaur & Allosaurus
Features:- 🦖Dinosaur Toys for Kids: Includes 2 dinosaur figures ( Pterosaur Figure & Allosaurus Figure). The size of pterosaur toy is 6”*2.7”*3.1” and the allosaurus toy is 10”*2.4”*3.5”, These dinosaur model toys are designed large enough to fit for children's hands to hold and play, It's a amazing gift and educational toys for Children 3 years-old and up
- 🦖Vivid Details & Hand Painted: As dinosaur toys for kids, Each dinosaur figure is finely sculpted and hand painted by experts, highly detailed for a realistic appearance.
- 🦖Educational Dinosaur Toys Playset: With true-to-life details, active poses, these dinosaur figurines can easily help capture kids' attention and spark imaginative play, Great for education purposes, party favors, school projects, landscape scenes, baby shower and decoration
- 🦖Best Gift for Kids&Children: Our dinosaur toys are designed for children to learn and enrich dinosaur characters, help children to discover the wonderful dinosaur world through these animals figures. It's also perfect for dinosaur themed cake toppers, jurassic themed party favor, and bathtub toy, Perfect gift for teachers, children and dinosaur lovers.
- 🦖High Quality: As for children's toy, safe is always the first! EOIVSH dinosaur figures set are made of high quality PVC, non-toxic and odorless, thoroughly safety tested to safeguard your child's health. If you have any problem, feel free to message us through “contact sellers” , we will solve your problem as soon as possible!
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3 Bees & Me Multi-color Unknown Binding
 | List Price: $24.99* Lowest New Price: $19.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: 3 Bees & Me Dinosaur Toys for Boys and Girls with Storage Box - 12 Large 6 Inch Realistic Toy Dinosaurs & Case - Dino Gift for Kids Age 3-5 5-7 8-12- Manufacturer: 3 Bees and Me
- Brand: 3 Bees & Me
- Model: 761780307528
- UPC: 761780307528
- EAN: 0761780307528
- PartNumber: 761780307528
Details:- Product Category: Unknown Binding
Physical Description:- Size: 7.0 Inches by 9.75 Inches by 3.0 Inches
- Weight: 1.2 Pounds
- Color: Multi-color
Features:- A Dinosaur Gift Set They Will Love - Searching for a cool birthday party, Christmas or just because gift for that special girl or boy age 3 year old and up? Kids play with this popular, realistic dino set for days not just minutes like with some gifts.
- Unique Metal Storage Box Makes Play More Fun - unlike other toy playsets that come with just the dinos or a plastic bucket tub that tears our storage box is durable metal which makes play more fun for kids and easy cleanup that Moms like!
- Fun and Educational - T-rex, Spinosaurus, Triceratops ... oh my! With 12 of the best big jumbo prehistoric dinasours as well as Names and Fun Facts about each, this real looking dinosaur toy collection can ignite your child's love of science and learning.
- Best Value - while most jurassic toy sets just come with the dinosaur action figures our set comes with a storage box AND fun facts making it a super and affordable value gift. s is a jurassic toy set you can give with peace of mind.
- 60-Day 100% Money-Back Gifts Guarantee - our toy dinosaur figure sets are backed by our top sellers no-risk Satisfaction Guarantee. If you or the little kid it's for don't absolutely love our dinosaur figurines playset we will refund your money.
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Jurassic World Toys Multi_color Toy
![Jurassic World Feature Plush Ankylosaurus Bumpy Baby Dinosaur Toy with Roar Sound & Floppy Legs; Camp Cretaceous Soft Doll Play or Nap Buddy, Gift for Kids Ages 3 Years & Older [Amazon Exclusive]](https://m.media-amazon.com/images/I/41KqBbvLM2L._SL160_.jpg) | List Price: $29.88* Lowest New Price: $21.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: Jurassic World Feature Plush Ankylosaurus Bumpy Baby Dinosaur Toy with Roar Sound & Floppy Legs; Camp Cretaceous Soft Doll Play or Nap Buddy, Gift for Kids Ages 3 Years & Older [Amazon Exclusive]- Manufacturer: Mattel
- Brand: Jurassic World Toys
- Model: HDV00
- UPCs: 194735062669, 194735031726
- EANs: 0194735062669, 0194735031726
- PartNumber: HDV00
Details:Physical Description:- Size: 5.0 Inches by 9.06 Inches by 10.51 Inches
- Weight: 1.5211896078 Pounds
- Color: Multi_color
Features:- Must-have plush toy inspired by a favorite Jurassic World: Camp Cretaceous dinosaur – Ankylosaurus Bumpy.
- Made of soft, easy-to-touch fabric, this 15-inch soft doll with floppy legs is a great comforting buddy for naptime or bedtime.
- This soft dinosaur doll also has a ROAR sound feature, so he's great for active play, too. Recreate Bumpy scenes from Jurassic World: Camp Cretaceous or invent new ones!
- Kids can collect other Jurassic World plush toys to make their own dinosaur park! Each sold separately, subject to availability.
- Makes the perfect gift for ages 3 years old and up, especially those who love plush toys, dinosaurs and action play!
Click here for more information |
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Boley 18 Pack Toy
 | List Price: $18.95* Lowest New Price: $14.95* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: Boley 18 Pack 4" Dinosaur Toy Set - The Gosnell Model - Educational Dinosaur Toy and Mammoth Action Figure Playset for Kids - Great As Dinosaur Toys and Birthday Party Favors! - Ages 3 and Up!- Manufacturer: Boley
- Brand: Boley
- UPC: 084495533342
- EAN: 0084495533342
- PartNumber: 1251A
Details:Physical Description:Features:- WHAT'S INSIDE: Boley's 18 Pack Authentic Dinosaur Set includes 18 realistic and detailed dinosaur and mammoth action figurines! All of our plastic dinosaurs are durable enough to withstand repeated play yet small enough for little boys and girls.
- PERFECT FOR GROWING MINDS: Every creature in our playset has it's name printed on the belly for your child to practice and learn. Boost your child's vocabulary development and understanding of the prehistoric world!
- 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.
- LOOKING FOR MORE?: Check out our Boley store here on Amazon for an exciting and diverse array of children's educational toys. From dollhouses to dinosaurs, Boley is where the action is!
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YOOUSOO
 | Lowest New Price: $27.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: Dinosaur Toys Set, Jumbo Dinosaur Figures 6PCS + Dinosaur Finger Puppets 5, Realistic Dinosaur Model for Kids Boys, Girls Party Gifts Birthday Favors, Fit Age 3 Years Old & Up- Manufacturer: YOOUSOO
- Brand: YOOUSOO
- UPC: 717373816472
- EAN: 0717373816472
- PartNumber: CPUS-6SET-FBA
Details:Physical Description:- Size: 5.0 Inches by 14.0 Inches by 3.0 Inches
- Color: Multi_color
Features:- 【WHAT'S INCLUDING】Pterodactylus,Tyrannosaurus,Brachiosaurus,Styracosaurus,Spinosaurus,Allosaurus. This jumbo dinosaur set includes realistic, colorful dinosaur figures that are durable and made from high-quality material.
- 【PERFECT EDUCATIONAL GIFT】 Your children will Enjoy Hours of Imaginative Play with our Jumbo Realistic-looking Dinosaurs.All dinosaur toys are specially crafted with child safety in mind.
- 【REALISTIC-DETAILING】Dinosaurs features nice detailing making it perfect for educational displays or in everyday play.Large Sizes Soft Dinosaurs Build a More Realistic Jurassic Dinosaur Park.
- 【EDUCATIONAL DINOSAUR FIGURES】Kids will Enjoy Hours of Imaginative Play with These Jumbo Realistic-looking Dinosaurs!Fun and Educational for Both Boys and Girls Alike.Just Right for a School / Dinosaur Science Project or Report.
- 【FANCY CUSTOMER SATISFACTION】Providing a 100% satisfaction experience is our main priority to our customers. Feel free to message us through “contact sellers” if products don't meet your expectations.
Click here for more information |
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Tepsmigo
 | Lowest New Price: $26.99* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: Tepsmigo Soft Dinosaur Toys for Kids 3-5, Dinosaur Toys for Kids Toddlers - 6Pack Jumbo Dinosaur Toys, Jurassic Dinosaurs T-Rex Velociraptor Triceratops..., Perfect Dinosaur Toys for Kids 3-5, 5-7- Manufacturer: TEPSMIGO
- Brand: Tepsmigo
- UPC: 728370640649
- EAN: 0728370640649
- PartNumber: DINO-2022
Physical Description:- Color: Jumbo Dinosaur Set
Features:- JUMBO REALISTIC DINOSAUR FIGURES - This prehistoric play box includes 6Jumbo dinosaur animal figures from 10" -12" nose to tail. They include 2 carnivores:T-Rex, Velociraptor and 4 herbivores: Brachiosaurus, Stegosaurus,Triceratops and Ankylosaurus. They are life-like and great for boys and girls aged 3 year old and up.
- SAFE MATERIAL, BPA-FREE NON-TOXIC DINOSAUR TOYS - Made from soft PVC plastic material, which is BPA-free non-toxic and durable. it’s safe for children to use. All materials are safety-tested and approved for use in children’s toys and meet US toy safety standards.
- REALISTIC LOOK DINOSAUR TOYS - The hand-paint gives it a realistic look, and their vibrant coloring is very nicely detailed with good shadings and can give kids hours of imaginative play. Both for indoor and outdoor use.
- EDUCATIONAL AND FUN DINOSAUR TOYS - TEPSMIGO 6 Pack Jumbo Dinosaurs Set are perfect for providing hours of endless imaginative fun as well as developing growing minds!The dinosaurs' uniquely modeled textures will help spark your child’s curiosity for science. Don’t miss this opportunity for early developmental growth, and consider dinosaur sets that are more than just fun.
- GREAT GIFT FOR BOYS AND GIRLS - 6PCS jumbo dinosaur set toys are perfect for party favors, birthday gift or Christmas gift for boys, girls and Dino Lover. Packed in a cool gift box,this super pack of jumbo T-Rex Velociraptor Triceratops Stegosaurus Brachiosaurus Ankylosaurus will fill any Dinosaur World created in your child's imagination and be a big surprise!
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E EAKSON
 | List Price: $21.99* Lowest New Price: $17.95* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 More Info)
Click Here | Description: E EAKSON Kids Dinosaur Figures Toys, 3-7 Inch Plastic Dinosaur Playset, STEM Educational Realistic Dinosaur Figurine for Boys Girls Toddlers Including T-Rex, Stegosaurus, Triceratops, 27 Pack- Manufacturer: HAODAIWANJU
- Brand: E EAKSON
- EAN: 7082146929059
- PartNumber: GSS015
Details:Physical Description:- Size: 3.0 Inches by 7.0 Inches by 5.0 Inches
Features:- ★【CHILD FRIENDLY & SAFE】 Made of durable high-quality plastic, non-toxic, BPA free and eco-friendly, strong enough to withstand hours of rugged play. Tested to be safe for kids.
- ★【PERFECT SIZE FOR KIDS' HANDS】19 unique dinosaur figurines with vibrant colors, size is 3-7 inch. Fun and educational for both boys and girls. Kids dinosaur toys are great for home school, as part of a science project at school, or even for taking with you on road trips or in the house!
- ★【STEM TOYS & DEVELOP SKILLS】:Fun and educational for both boys and girls. Kids dinosaur toys are great for home school, as part of a science project at school. The simple and fun game can enhance new vocabulary, language skills and hand-eye coordination through imaginative play. Great for pretend play with friends and family! Or even for taking with you on road trips! Kids will love these dino figures!
- ★【IMAGINATIVE PLAY】:The realistic dino figurines toys will spark hours of imaginative play. Make away your kids from electronics and let your child's imagination run wild as they create imaginary interactions with prehistoric jurassic dinosaur.
- ★【IDEAL GIFT FOR CHILDREN】:The E EAKSON dino figures toys are great gift for Holidays, Children's Day, Christmas, New Year, stocking stuffers, dinosaur party favors, birthday party, educational toys and so on.
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Boley Assorted Toy
 | List Price: $29.99* Lowest New Price: $17.95* In Stock.* *(As of 17:36 Pacific 25 Jan 2023 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.
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