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My Cretaceous dinosaurs from North America


Anomotodon

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Starting as a shark tooth collector a long time ago, last year I became interested in dinosaur fossils and decided to start collecting them. Despite dinosaur material, especially from rare locations, being usually very expensive for a college student, over this year I managed to get some interesting specimens through numerous trades, sales and purchases, some of which I want to organize in this topic.

 

So, let's begin with Early Cretaceous (Aptian-Albian). All of my material from this time comes from Cloverly formation in Montana and Wyoming.

 

Tenontosaurus tilleti - a large basal ornithopod, I have tooth and a vertebra with ?bite marks

 

tenontosauris.thumb.jpg.bb3c06766c351b04b0f48227808bc4a7.jpgtenonto.thumb.jpg.52a4c4d57999dd1cad257645ae936be7.jpg

 

And a rare Nodosaurid tooth - Sauropelta is the only one described, although there could potentially be more than one species

 

sauropelta.thumb.jpg.457809bd7c58dc3618231ae755f7a834.jpg

 

Cenomanian stage (early Late Cretaceous) is not that well represented in North American dinosaur fossil record, I have a hadrosaur and dromaeosaurid teeth from Woodbine formation, Texas

 

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A very significant portion of dinosaur fossils from North America comes from Campanian deposits of various stages. Let's begin with Judith river formation in Montana. Got some nice theropods - Tyrannosauridae indet. (potentially present Daspletosaurus and Gorgosaurus cannot be differentiated based on teeth) on the left and Saurornitholestes sp. on the right.

 

Judith River Tyrannosaursaurornitholestes.jpg.06ee11efbd75ce6d475b7b253b242301.jpg

 

And a nice Ceratopsian tooth (again, cannot be identified to the genus level, too many of them present)

 

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There is another formation in Montana of a similar age - Two Medicine formation. Recently got some nice material from there I can show here. First, a maxillary tooth from a hadrosaur Gryposaurus latidens - easily identifiable by the presence of denticles near the crown apex.

 

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Unidentified hadrosaur tooth with a complete root

 

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  • I found this Informative 10

The Tooth Fairy

 

 

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In addition a Hadrosaur rib from the same location - it has some restoration but I got it from a really good trade so I am happy anyways

 

image.thumb.png.d05e0108879278a8391f9cd6ec6cac82.png

 

Also got some material from Campanian of Southwestern states - Kirtland formation (New Mexico) tyrannosaur Bistahieversor sealeyi...

 

bistahieversor.thumb.jpg.f42a7baabe8863d9875d7ac3f7b93e1e.jpg

 

...and Kaiparowits formation (Utah) hadrosaur toe phalanx

 

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Aguja formation of Texas is also of a similar age with similar fauna -

 

Very nice undescribed Tyrannosaurid tooth that I traded in Tucson 2 weeks ago

 

agujatyrannosaur.thumb.jpg.e9e16ba42aba1119431ac115bce6984d.jpg

 

Dromaeosaurid tooth, likely Saurornitholestes due to vertically pointing denticles (left) and a Hadrosaurid tooth (Angulomastacator is the only one described but there are also rumors of Kritosaurus)

 

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A Nodosaurid tooth and a practically complete ?Ornithomimid phalanx

 

5c6a4b674259f_texasankylosaur.thumb.jpg.b11643c4c778cd736d7ebccc41ace9d1.jpgornithomimid.thumb.jpg.e84c96d7bcaaa59d1234961fbb379e46.jpg

 

  • I found this Informative 9

The Tooth Fairy

 

 

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Right after Campanian comes the Maastrichtian stage, early part of which is well represented in Canada by Horseshoe canyon formation. I have two tyrannosaur teeth, likely from Albertosaurus sarcophagus and hadrosaur tooth and ungual.

 

Canadian AlbertosaurusCanadian Albertosaurus N2

Canadian Hadrosaurid ungualCanadian hadrosaur

 

Late Maastrichthian is present in Wyoming (Lance formation)...

 

troodon.thumb.jpg.e88e5cec2bf083bcfc026f79cd8ba1f5.jpg

 

...and Montana, South and North Dakotas (Hell Creek formation). Still don't have that much interesting stuff from there, just generic species

 

hellcreek.thumb.jpg.d0133bd4bb4b03dde313864b16bb578c.jpg

 

A - Thescelosaurus neglectus premaxillary tooth

B - Denversaurus schlessmani

C - Nanotyrannus lancensis

D - Richardoestesia isosceles

E - ?Crocodile vertebra

F - Edmontosaurus annectens spitter tooth

G - Ceratopsian spitter tooth

H - Crocodile osteoderm

I - Borealosuchus sternbergi tooth

J - Brachychampsa montana tooth

K - Myledaphus stingray tooth

  • I found this Informative 7

The Tooth Fairy

 

 

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Fantastic fossils. You have picked up some cool stuff from a diversity of formations. Dinosaur material is expensive and being a single dad means my budget is not that different than a college student lol

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Very impressive start to your dinosaur collection. :)

Some really attractive and interesting pieces there. 

 

Life's Good!

Tortoise Friend.

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Amazing fossils. I've always been interested to see what you had. I wasn't disappointed.

Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday!

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Very nice collection of dinosaur material :D

-Christian

Opalised fossils are the best: a wonderful mix between paleontology and mineralogy!

 

Q. Where do dinosaurs study?

A. At Khaan Academy!...

 

My ResearchGate profile

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Excellent collection from some very interesting localities.  I also started as a shark tooth collector but soon fell in love with Dinosaurs.  Thanks for sharing always good to see new collections.

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Awesome fossils!

“...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin

Happy hunting,

Mason

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Great collection mate! 

You take really nice detailed pictures too.

Your Cloverly stuff is my favourite.

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