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Showing results for tags 'hell creek formation'.
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From the album: Dinosaurs
Right maxillary tooth from a juvenile animal.- 1 comment
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- t rex tooth
- juvenile tyrannosaurus rex
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Why Dino Collectors need to have Material Verified
Troodon posted a topic in Is It Real? How to Recognize Fossil Fabrications
I urge caution to all collectors buying or trading from dealers, diggers or fellow collectors. Most collectors, diggers or dealers are honest and trustworthy but not all have a firm handle on identification and I'm seeing this situation worsening not improving. Its not easy even for paleontologists who are trained. I include collectors because like myself, have over the years, been sold misidentified material. So dont trust anything you see offered to you and get it verified. Here is just a sampling of a few items I've run across. Provenance is very important in identi- 12 replies
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- daspletossurus
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Edmontosaurus annectens may have been the largest dinosaur in the Hell Creek/Lance Formations not T rex. Here is an article that gets into the specifics. https://thesauropodomorphlair.wordpress.com/2021/02/10/size-of-the-duck-titans/
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- edmontosaurus annectens
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There are two Tyrannosaurs described in the Hell Creek & Lance Formations, Tyrannosaurus rex and Nanotyrannus lancensis. Teeth from these animals are the number one sought after and coveted item by collectors. I don't understand all the hoopla and prices they command since my friends who I collect with know that I'm not a tooth person and prefer bones and claws. However I've been fortunate to find and acquire a few teeth and will post a several of my nicer ones. My two most favorite T-rex teeth are my biggest and smallest: The Baby (one of the rarest teeth around) is 1 1/8" and w
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- hell creek formation
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The virus put a damper on my Spring dinosaur collecting trip but I was able to get a partial one in for the Fall. I was able to spend several days at my usual Edmontosaurs bonebed but unfortunately only one day at a channel deposit in Montana where theropod/mammal material can be found. Hopefully next year will be more normal, Hopefully. Quite a few new members since my last trip so I will get into more specifics to get them a view of how I collect this material. First let me share with you a view of the collecting area and the LOCAL wildlife that we deal with on a
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- hell creek formation
- montana
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Ontogeny of the Pachy Sphaerotholus buchholtzae from Hell Creek Fm
Troodon posted a topic in Documents
For Pachycephalosaurid lovers this paper documents the morphology & ontogeny from +20 specimens of Sphaerotholus buchholtzae. It also evaluates the systematics to show that it's a distinct and valid genus in the Hell Creek Formation along with Pachycephalosaurus wyomingensis. https://academic.oup.com/zoolinnean/advance-article-abstract/doi/10.1093/zoolinnean/zlaa179/6125117- 1 reply
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- late cretaceous
- sphaerotholus buchholtzae
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Hi everyone! I have a large claw from the Hell Creek Formation of Harding County, South Dakota that I was hoping to have help identifying. It is large enough that I initially believed it stood a chance at being tyrannosaurid, but it seems a bit more compressed than tyrannosaur claws I’ve worked with in the past - particularly on the lower ridge. The ventral surface of the claw is also distinctly flat rather than rounded, which seems unusual. Could this be a Dakotaraptor claw or is that just wishful thinking? Large Anzu perhaps? It is right around 1.75 inches across the length of the claw (sorr
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Hi all, I came across this Ceratopsian tooth from the HC Fm. online and was wondering what you make of the 'wear facet' on the root? Did this occur naturally in the jaw while the tooth got disposed of? I have not seen this before so I am curious Thanks in advance!
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Hello! I got this dinosaur vertebra from Hell Creek (Montana) a few years back. It was sold to me as a Triceratops vertebra but I don't know how that ID was made. It's not in the best condition (has moss(?) on it and has been broken and then glued back together) but it is about 13-14 centimetres across so it is clearly from a big dinosaur, but there were plenty of those in Hell Creek (even two large ceratopsids - Triceratops and Torosaurus). Looking for any insight into how an ID could be made here and if Triceratops (or even just ceratopsid) is correct
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From the album: Dinosaurs
A high-quality replica of Stan's posterior right dentary tooth. About 4.5" in length. -
From the album: Dinosaurs
Distal serrations of a juvenile Nanotyrannus lancensis (Hell Creek Fm., Dawson Co., MT). -
Ankylosauridae & Nodosauridae Teeth - Can You differentiate?
Troodon posted a topic in General Fossil Discussion
I see a lot of misunderstanding on what is being sold online at auctions and dealers sites. Some have it correct but most mix up the terminology. So here is Anky 101 aimed at Novice collectors and I will keep it simple. What you see sold in most markets are teeth from late Cretaceous North American locations mostly Montana, Wyoming and the Dakota's so I will focus on those areas. (Hell Creek, Lance, Two Medicine and Judith River Formations) Teeth from Canadian locations will have similar characteristics. There are two basic families of armored dinosaurs in these regions Ankylosauri- 35 replies
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- nodosaurid
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Identification: Originally listed as a Dromaeosaurid tooth, I suspected it was from a Tryannosaurid. Upon receiving the tooth, I contacted a few paleontologists to get expert opinions. Their conclusion was that the tooth was likely from a baby/juvenile Tyrannosaur. Since the only Tyrannosaurs in the Hell Creek Formation are Tyrannosaurus rex and Nanotyrannus lancensis (or only T. rex if N. lancensis is a young T. rex), and considering the cross-section of the base of the tooth, this must be from a baby Tyrannosaurus rex. This tooth shares many qualities with adult teeth, a fact which
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From the album: Dinosaurs
K-Pg Boundary Microtektites Hell Creek Formation Garfield Co., MT, USA These aren't fossils, but are relevant to the extinction of the non-avian dinosaurs, pterosaurs, large marine reptiles, and many other species of flora/fauna at the end of the Cretaceous. When a large meteor/asteroid struck the earth ~ 66 mya, it sent molten ejecta across the world. Some of this molten material, sourced from the impact site, was shaped by its trajectory through the atmosphere and cooled into small, glassy droplets. The black blobs you see are those droplets, called tektites -
Hell Creek Formation Juvenile Tyrannosaurid Teeth
ThePhysicist posted a gallery image in Members Gallery
From the album: Dinosaurs
A juxtaposition of the bases of two juvenile Tyrannosaurid tooth crowns from the Hell Creek Formation. Nanotyrannus: Dawson Co., MT Tyrannosaurus: Carter Co., MT-
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- nanotyrannus v t rex
- juvenile tyrannosaur
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Every few years we get rewarded with a new dinosaur described from the Lance/Hell Creek Formations. In this crazy year we finally have one. Finally an Alvarezsauridae has been described from the Hell Creek Formation: Trierarchuncus prairiensis. Sorry its paywalled cannot make comments https://www.sciencedirect.com/science/article/pii/S0195667120302469 Here is some info on this very different dinosaur, one of my favorites, including some of my material so you can see what the paper is describing. Far better than what you see in the paper
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- maastrichtian
- hell creek formation
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This work by Denver Fowler reviews the stratigraphy of the Hell Creek Formation, as currently understood using the Fort Peck as his study area https://www.mdpi.com/2076-3263/10/11/435
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The skull of any dinosaur is composed of many different elements. When I go collecting in an Edmontosaurus bonebed one never finds a skull but the elements that make up one up. Like to use this topic to share the complexity and variety of some of the elements I have collected. I do not have many but will post the ones I have and will continue to add as I prep or find them. Of course if anyone sees any discrepancies please feel to comment and like to thank Olof (LordTrilobite) in the ID of some. Skull still in a jacket not from my usual bonebed but one can see it all together
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- edmontosaurus annectens
- south dakota
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Hi everyone, I just got this tooth from the Hell Creek Formation of Carter County, Montana. It was labeled as Richardoestesia, so based on the curvature, I was assuming the proper ID would be cf Richardoestesia gilmorei. However, when taking some measurements, what caught my eye was that the mesial carina appeared to end 1/3 from the base, and I started to wonder if instead this tooth could possibly be Dakotaraptor. These are the measurements I was able to get: Mesial: around 5.5-6 serrations/mm Distal: around 5 serrations/mm CH: around 16.5 mm CBL: aroun
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- richardoestesia
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From the album: Dinosaurs
A tooth from a juvenile Nanotyrannus lancensis. Only missing the very tip.-
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- hell creek formation
- dinosaur tooth
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From the album: Dinosaurs
Hadrosaurs evolved very interesting teeth and complex mastication. Read "Complex Dental Structure and Wear Biomechanics in Hadrosaurid Dinosaurs:" https://science.sciencemag.org/content/338/6103/98-
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I was very happy to see that recent publication that finally described the youngest known alvarezsurid Trierarchuncus prairiensis from the Hell Creek Formation. Material is rare but is most commonly overlooked and described as Croc or unknown theropod so knowing what to look for helps. I'm constantly on the lookout for this material and have been for years and have been fortunate to either find it or be able to acquire it over time. I used publications of other Alvarezsauridae like the Asian Mononykus and Canadian Albertonykus to help in the identification of my specimens.
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- hell creek formation
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Updated 1/17/20 I've taken a pretty firm position on the validity of Nanotyrannus ever since I spent some time looking at the Dueling Dinosaurs shortly after they were discovered. Subsequent to that, new information that I've become aware of just cemented my position. I'm interested in understanding the "truth" and have no problem looking at all available specimens that are in private hands or museums. The optics are very clear to me and I have difficulty understanding the debate. Collectors need to form their own opinion on this but I would like to share with you why I beli
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- lance formation
- nanotyrannus lancensis
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My Jurassic Park - Birds/Ptero/Unknown Hell Creek & Lance Formations
Troodon posted a topic in Member Collections
Bird and Pterosaur material is extremely rare in the Hell Creek and Lance Formations. Over the years I've purchased and found a few bones that I believe fit this category but not certain. Some may be mammal or reptilian. I'm not a bird guy so if you see something that does not seem right please let me know. Not a lot is published so I'm always open to learning. I showed this to a well respected theropod paleontologist and the potential ID's were his thoughts- 35 replies
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- cretaceous birds
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Consolidated all my informational Topics to make it easier to reference. Will keep updating since some of the reference material is outdated. Have to thank @PFOOLEY for suggesting this consolidation and it makes it a lot easier for me to access these topics as well as our members to know what's out there. General Tips in Buying Theropod Teeth Dinosaur Anatomy 101 Stratigraphy of the Late Cretaceous in North America Best Books for Dinosaur Identification Rare Theropod Teeth (World Wide) Identification o
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- morisson formation
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