All about dinosaurs, fossils and prehistoric animals by Everything Dinosaur team members.
14 12, 2018

A New Horned Dinosaur Species from Late Cretaceous Arizona

By |2023-11-12T08:35:21+00:00December 14th, 2018|Dinosaur and Prehistoric Animal News Stories, Dinosaur Fans, Main Page, Photos/Pictures of Fossils|0 Comments

Crittendenceratops krzyzanowskii – A New Horned Dinosaur from Arizona

Many scientists and observers have described the last two decades as the “Golden Age” of dinosaur discoveries.  Since the turn of the century, there have been some astonishing fossil finds and many new species of dinosaur have been discovered and described.  None more so than with the horned dinosaurs and their relatives (Marginocephalia).

Over the last few years, we have reported on numerous new types of ceratopsian, many of these new horned dinosaurs having been discovered in strata laid down in the United States, for example, Medusaceratops, Aquilops, Kosmoceratops and Utahceratops.  Surprisingly, there had been no new horned dinosaurs named in 2018, that is no longer the case with a scientific paper published describing a new centrosaurine dinosaur from the Late Cretaceous of Arizona – Crittendenceratops krzyzanowskii.

A Life Reconstruction of the Newly Described Ceratopsian Crittendenceratops krzyzanowskii

Crittendenceratops krzyzanowskii illustrated.
A life reconstruction of the newly described ceratopsian Crittendenceratops (2018).

Picture credit: Sergey Krasovskiy

Only a Few Dinosaurs Named from Arizona

Writing in the New Mexico Museum of Natural History and Science Bulletin, the researchers, Sebastian G. Dalman and Asher Lichtig, both Research Associates at the New Mexico Museum of Natural History and Science, in collaboration with John-Paul Hodnett from the Maryland-National Capital Parks Commission and Spencer G. Lucas (a curator at the New Mexico Museum of Natural History and Science), describe Crittendenceratops and assign it the Centrosaurinae subfamily of horned dinosaurs and specifically to the Nasutoceratopsini tribe.

There have been so many new horned dinosaurs from North America named and described in the last twenty years or so, that this has led to a revision of ceratopsian taxonomy.  For example, the Nasutoceratopsini was erected recently (2016).

To read an article that summarises this revision: Redefining the Horned Dinosaurs.

Despite the wealth of dinosaur fossil material associated with the western United States, Crittendenceratops is one of only a handful of dinosaurs named from Arizona.

A Reconstruction of the Parietosquamosal Frill of C. krzyzanowskii

A reconstruction of the parietal frill of Crittendenceratops krzyzanowskii.
A line drawing showing a reconstruction of the parietosquamosal frill of Crittendenceratops krzyzanowskii.

Picture credit: New Mexico Museum of Natural History and Science

Crittendenceratops krzyzanowskii from the Fort Crittenden Formation

This new herbivore has been described from fragmentary fossil material, including skull elements from the shale member of the Fort Crittenden Formation.  Two individual animals are represented by the fossils.  Crittendenceratops is estimated to have been around 3.5 metres in length and would have weighed about 750 kilograms.  It lived 73 million years ago (Campanian stage of the Cretaceous) and 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.

The Nearly Complete Left Squamosal (Skull Bone) of Crittendenceratops

Near complete left squamosal bone of Crittendenceratops (NMMNH P-34906) dorsal view.
Left squamosal bone of Crittendenceratops (NMMNH P-34906) dorsal view.

Picture credit: New Mexico Museum of Natural History and Science

Honouring Stan Krzyzanowski

The new species was named by Sebastian G. Dalman, John-Paul Hodnett, Asher Lichtig and Spencer G. Lucas.  The genus name reflects the rock formation where the fossils were found (Fort Crittenden Formation), whereas the trivial name honours the late Stan Krzyzanowski, a Research Associate from the New Mexico Museum of Natural History and Science, who discovered the first bones to be ascribed to this new dinosaur in the Adobe Canyon area eighteen years ago.  Crittendenceratops can be distinguished from other members of the Centrosaurinae subfamily by the unique shape of the bones in its frill.

The scientific paper: “A New Ceratopsid Dinosaur (Centrosaurinae Nasutoceratopsini) from the Fort Crittenden Formation Upper Cretaceous (Campanian) of Arizona” by Spencer G. Lucas, Sebastian Dalman, Asher Lichtig and John-Paul Michael Hodnett published in the New Mexico Museum of Natural History and Science Bulletin.

Everything Dinosaur acknowledges the assistance of a press release from the New Mexico Museum of Natural History and Science in the compilation of this article.

Visit the award-winning Everything Dinosaur website: Everything Dinosaur.

14 12, 2018

Preparing Free Dinosaur Fact Sheets

By |2023-11-12T07:16:33+00:00December 14th, 2018|General Teaching|Comments Off on Preparing Free Dinosaur Fact Sheets

Preparing Fact Sheets about Dinosaurs

With the end of the autumn term nearly upon us, it is time for Everything Dinosaur team members to undertake a review of all the fact sheets on dinosaurs and other prehistoric animals that the company sends out to schools, home educators, museum staff and young dinosaur fans.  For the vast majority of the prehistoric animal models that the UK-based company sells, a fact sheet about that creature is commissioned.  Having a fact sheet about a dinosaur for example, is our way of helping to educate and inform people about life in the past.

Prehistoric Animal Fact Sheets from Everything Dinosaur

Fact sheets prepared by Everything Dinosaur for the Beasts of the Mesozoic range of models.
A collection of Beasts of the Mesozoic fact sheets created by Everything Dinosaur. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Dinosaur Fact Sheets – Helping to Educate and Inform

Everything Dinosaur’s fact sheets and other teaching resources are available free on request.  Team members are happy to email them out to schools, other institutions and interested parties.  Simply, drop us an email stating what you would like and our dedicated staff will do all they can to assist you and supply your needs.

Contact Everything Dinosaur: Email Everything Dinosaur.

An A-Z of Dinosaurs and Prehistoric Animals

From Acheroraptor to Zuniceratops, Everything Dinosaur has hundreds of prehistoric animal data sheets.  Each one has a scale drawing which shows the estimated size of the animal.  More fact sheets are added each year, the company has plans to commission another thirty in 2019.  Researching, writing and producing these fact sheets is quite an undertaking, fortunately, team members can call upon the expertise of their palaeontologist chums to assist them in their compilation.

All the Fact Sheets Contain Scale Drawings

Drawing of Brontosaurus.
A scale drawing of Brontosaurus. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

A spokesperson from Everything Dinosaur commented:

“At the moment, team members are busy compiling prehistoric animal fact sheets to help support the work of schools, home educators and other institutions.  It’s our way of helping to educate and inform people about life in the past.”

Visit the Everything Dinosaur website: Everything Dinosaur.

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