Horned dinosaur Crittendenceratops discovered in Arizona

December 14, 2018, New Mexico Museum of Natural History & Science
Credit: Crittendeceratops restoration by Sergey Krasovskiy

Palentologists are announcing a new dinosaur discovery in the southwest United States. Crittendenceratops krzyzanowskii is a new ceratopsid (horned) dinosaur from 73-million-year-old (Late Cretaceous) rocks in southern Arizona. It is one of the few dinosaurs named from Arizona.

Crittendenceratops krzyzanowskii was named by Sebastian Dalman, John-Paul Hodnett, Asher Lichtig and Spencer Lucas, Ph.D, in an article recently published in the New Mexico Museum of Natural History & Science Bulletin.

Dalman and Lichtig are Research Associates of the New Mexico Museum of Natural History & Science (NMMNHS), Lucas is a curator at NMMNHS, and Hodnett is a paleontologist employed by the Maryland-National Capital Parks Commission.

The name Crittendenceratops is for the Fort Crittenden Formation (the that yielded the ) and Greek ceratops, which means horned face. The species name krzyzanowskii is for the late Stan Krzyzanowski, a NMMNHS Research Associate who discovered the bones of the new dinosaur.

Crittendenceratops belongs to a group of horned called the centrosaurs, and can be distinguished from other centrosaurs by the unique shape of the bones in its frill (head shield). Crittendenceratrops was about 11 feet long and weighed an estimated three-quarters of a ton. Like other ceratopsids, Crittendenceratops was a plant eater.

The rocks that yielded the bones were deposited along the margins of a large lake that was present in an area southeast of Tucson, Arizona during the Late Cretaceous.

Horned dinosaur Crittendenceratops discovered in arizona
Crittendenceratops frill. Credit: New Mexico Museum of Natural History & Science
Crittendenceratops squamosal bone. Credit: New Mexico Museum of Natural History & Science

Explore further: Rare tooth find reveals horned dinosaurs in eastern North America

More information: A New Ceratopsid Dinosaur (Centrosaurinae: Nasutoceratopsini) From The Fort Crittenden Formation, Upper Cretaceous (Campanian) Of Arizona. www.researchgate.net/publicati … CAMPANIAN_OF_ARIZONA

Related Stories

New horned dinosaur reveals unique wing-shaped headgear

June 18, 2014

Scientists have named a new species of horned dinosaur (ceratopsian) based on fossils collected from Montana in the United States and Alberta, Canada. Mercuriceratops (mer-cure-E-sare-ah-tops) gemini was approximately 6 meters ...

Meet Xenoceratops: Canada's newest horned dinosaur

November 8, 2012

Scientists have named a new species of horned dinosaur (ceratopsian) from Alberta, Canada. Xenoceratops foremostensis (Zee-NO-Sare-ah-tops) was identified from fossils originally collected in 1958. Approximately 20 feet long ...

Recommended for you

Frog choruses inspire wireless sensor networks

January 21, 2019

If you've ever camped by a pond, you know frogs make a racket at night; but what you might not know is how functional and regulated their choruses really are. Frogs communicate with sound, and amid their ruckus is an internally ...

Study: Social media sways exercise motivation

January 17, 2019

It's January – a time when students are looking for that extra bit of oomph. For some, time spent on social media might provide the necessary inspiration to get up and exercising – but that time can come with consequences, ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.