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Showing results for tags 'Hell creek'.
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Can someone ID this tooth ? Is it worth buying?
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I am assuming this is a ceratopsian skull bone, but I am stumped! Can someone help me with the ID? Ceratopsian anatomy isn't my specialty. Excavated from mudstone in the Hell Creek Fm. Slope Co. North Dakota Any help would be greatly appreciated! Thanks in advance!
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This is a fossil seed I got from the Hell Creek Formation (Montana) last year. Would you say this is a species of Marmarthia or some other plant?
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Hello! I’ve had this tooth for a while now and always labeled it as nannotyrannus, since that’s what I bought it as. It’s about .8” long, supposed to be from the Hell Creek formation but no other locality was listed, so I understand an ID might not be 100%. I was just wondering broadly if it was a tryannosaur or dromeosaur tooth. At first I thought tyrannosaur because it’s kind of thick for its size and has large serrations. It also looks like it has “pinching” on only the right side in the base picture which made me think it was a nanno tooth specifically. Then I saw a picture posted on the forum of a similar sized tooth with the same profile listed as dromeosaur. Any help would be appreciated thanks!
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Hello everyone, I'd like to submit this vertebra to you to understand if it really belongs to packycephalosaurus and possibly if in your opinion how much it has been reworked. Indications on the label: Dimensions: 125mm Origin: Hell Creek Formation, South Dakota, USA CRETACEOUS-Upper Cretaceous, Maastrichtian (66.0-72.1 million years) Thank you very much
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Unique find! Partial Triceratops Skull! Thoughts Welcome!
DitraFossil posted a topic in Is It Real? How to Recognize Fossil Fabrications
Good morning fellow fossil hunters. I have the opportunity to purchase a partial triceratops skull. Below please find the photos. It allegedly has 15-20% restoration and is from Hell Creek. Here are the dimensions: from the top to the back of frill it is 39 inches, and the horns are 23 inches measuring from the inside. It’s 21 inches across and weighs about 100 pounds. It was found by a friend of a friend. Questions: how does it look to you? Is it a juvenile, as the size seems somewhat small to me, but perhaps that is because it is only a partial skull? It is quite expensive so, I wanted to get the thoughts of the forum first!
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This piece was found in wyoming and was prepped in the field, described as a section of triceratops frill, is that accurate?
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Edited 3/11/23 to better reflect current info. I've recently gotten interested into the turtles of the Hell Creek and Lance formations and decided to compile what I've gathered onto here. It's amazing to see how many different species have been described from these deposits. I've also tried to attach links to papers that talk about these turtles (at about 22 species!). If I've gotten anything wrong or missed anything please let me know! Adocidae: Adocus sp. (part30043.pdf) listed as being present Baenidae: (https://www.researchgate.net/publication/283851398_A_Review_of_the_Fossil_Record_of_Turtles_of_the_Clade_Baenidae) "Baena" hayi Boremys pulchra (https://www.researchgate.net/publication/241730757_Anatomy_and_relationships_of_the_turtle_Boremys_Pulchra_Testudines_Baenidae) (https://www.researchgate.net/publication/362931080_Stratigraphic_range_extension_of_the_turtle_Boremys_pulchra_Testudinata_Baenidae_through_at_least_the_uppermost_Cretaceous) Cedrobeana putorius (A_Revision_of_Plesiobaena_Testudines_Baenidae_and_.pdf) Eubaena cephalica (https://www.researchgate.net/publication/326165618_A_Description_of_the_Skull_of_Eubaena_Cephalica_Hay_1904_and_New_Insights_into_the_Cranial_Circulation_and_Innervation_of_Baenid_Turtles) Eubaena hatcheri Gamerabaena sonsalla (https://www.researchgate.net/publication/238706760_A_New_Baenid_Turtle_from_the_Upper_Cretaceous_Maastrichtian_Hell_Creek_Formation_of_North_Dakota_and_a_Preliminary_Taxonomic_Review_of_Cretaceous_Baenidae) Hayemys latifrons Peckemys brinkman (see Cedrobaena) Palatobaena cohen Saxochelys gilberti (https://www.researchgate.net/publication/336314521_A_new_baenid_turtle_Saxochelys_gilberti_gen_et_sp_nov_from_the_uppermost_Cretaceous_Maastrichtian_Hell_Creek_Formation_sexual_dimorphism_and_spatial_niche_partitioning_within_the_most_speciose_group_o) Stygiochelys estesi (https://digitallibrary.amnh.org/handle/2246/2652?show=full) Thescelus insiliens Chelydridae?: Emarginachelys cretacea (https://www.biodiversitylibrary.org/part/17248) Compsemydidae: Compsemys victa (https://www.researchgate.net/publication/232688551_Cranial_Anatomy_and_Phylogenetic_Placement_of_the_Enigmatic_Turtle_Compsemys_victa_Leidy_1856) Kinosternidae: Hoplochelys clark (https://www.researchgate.net/publication/226429911_A_new_kinosternoid_from_the_Late_Cretaceous_Hell_Creek_Formation_of_North_Dakota_and_Montana_and_the_origin_of_the_Dermatemys_mawii_lineage) Sinemydidae?: Judithemys backmani (https://www.researchgate.net/publication/232696535_Macrobaenidae_Testudines_Eucryptodira_from_the_Late_Paleocene_Clarkforkian_of_Montana_and_the_Taxonomic_Treatment_of_Clemmys_backmani) Nanhsiungchelydidae: Basilemys sinuosa (B023a33.pdf) listed as being present Trionychidae: Axestemys infernalis (https://www.researchgate.net/publication/337382811_A_new_species_of_trionychid_turtle_Axestemys_infernalis_sp_nov_from_the_Late_Cretaceous_Maastrichtian_Hell_Creek_and_Lance_formations_of_the_Northern_Great_Plains_USA ) (https://www.researchgate.net/publication/260636886_Giant_fossil_soft-shelled_turtles_of_North_America) Hutchemys sterea (https://escholarship.org/uc/item/6090612k) Hutchemys walkerorum (https://www.sciencedirect.com/science/article/abs/pii/S0195667122000362) Helopanoplia distincta (https://peerj.com/articles/4169.pdf) Gilmoremys lancensis ( https://www.researchgate.net/publication/259887738_New_Material_of_Gilmoremys_lancensis_nov_comb_Testudines_Trionychidae_from_the_Hell_Creek_Formation_and_the_Diagnosis_of_Plastomenid_Turtles)
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From the album: Hell Creek / Lance Formations
Cimolodon nitidus Hell Creek Fm., Meade Co., SD, USA M1 (1st upper molar) While you may have mistaken it for a rodent, Cimolodon belonged to a far more ancient and wildly successful group of mammals, the multituberculates (so named for the multiple cusps arranged in rows on their molars). It likely ate seeds and nuts which were handedly ground by its lego-shaped molars. Cimolodon had to be wary of the likes of Pectinodon or other small predatory dinosaurs in the Hell Creek ecosystem. Unlike a few other contemporaneous mammals, this cousin of ours did not survive the K-Pg extinction event and perished along with the non-avian dinosaurs.-
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Yay! It's #FossilFriday once again! So if you are stuck at work and trying to look busy, here is the first part of my fossil hunt from last year in the Hell creek fm of South Dakota.
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Hoping someone can help me ID this bone from the Hell Creek Formation. When I received it a while back it was suggested to me that it could be part of a Triceratops beak, but I'm struggling to see it. Judging by the texture it does look like a piece of Triceratops skull though, so I was hoping someone familiar with trike skulls might be able to help me out.
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Hi I've cleaned this bone as best as I can with my engraver. I do not have an air compressor. How would I proceed with cleaning up this specimen?
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Hello everyone ! I bought this Tyrannosaur tooth and the seller told me it was either a Tyrannosaurus rex or a Nanotyrannus. Can you tell me if it's a T-rex or a Nanotyrannus ? It's a premaxillary tooth. It comes from Hell Creek formation in South Dakota.
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anyone identify this? It is roughly palm sized.
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Hi all, Any thoughts on the ID of this claw? About 3 cm long, sold as ?dromaeosaur claw from Hell Creek, Slope County, ND. The phalanx was found in the same location but not articulated. I've chewed through the excellent "Identification of Claws/Unguals from the Hell Creek/Lance Formations" topic but can't quite fit it to anything!
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Hello everyone I went on a commercial dino dig tour Summer 2022 of the Hell Creek formation in the Butte County, South Dakota area and found lots of bones and spitter teeth and had a great time. These two were in my unknown/unidentifiable pile and I've recently done some cleaning/prep to them and was requesting some help with possible IDs. The first item (on the left in most of the images) looks like a broken rooted ceratopsian/triceratops tooth to me with ridges and enamel showing. The second item (on the right in most of the images) looks a little like a scute with a raised round/circular area in the center and a lot of what looks like scratch marks on the opposite surface. I'm a newbie to the Hell Creek and these guesses may be off. Let me know if you would like any additional angles or detail for help with the ID. Thanks a bunch for looking
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From the album: Hell Creek / Lance Formations
Interesting blue color near the base, and some feeding wear at the tip of this immature Tyrannosaurid tooth.-
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Hi all, These two teeth came from the same seller and were put up for sale at the same time. They're so odd, that I thought it might be helpful to post them together since, if they come from the same animal, perhaps they provide more information as a pair than either would alone. Ricardo premax? Pterosaur? Acheroraptor? From the Hell Creek formation in Garfield, Montana CH: About 10mm (both) CBL: Tricky enough that I didn't measure, but can try if needed CBW: Tricky enough that I didn't measure, but can try if needed Mesial Serration Density: about 15/mm Distal Serration Density: about 15/mm (one of them is worn to the point of no serrations on one side, but the other side is about 15/mm, so I assume the missing side would have had serrations and been the same). Strong fluting on one or both sides. Thank you!! TOOTH 1 Possibly smooth side: Ridges: TOOTH 2
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How variable are Hell Creek/Lance Formation crocodilian teeth?
Jurassicbro238 posted a topic in Questions & Answers
I've had these crocodilian teeth from Niobrara County in the Lance Formation for a while now, but I'm not sure how if its possible to ID them beyond "Crocodilian tooth." I've generally heard that the "sharp" morphology are Borealosuchus teeth and the short bulbous teeth are Brachychampsa. Is that a safe rule to follow? I've also noticed that there are some slight differences in the teeth I have (hopefully the pics make it visibile). They're small, but the two on the lower left have noticeable raised striations (not sure what to call it). However, the one on the lower right and on the top are smooth. Is this just a difference in preservation? Identifiable traits to the species level? Positional characteristics? Individual variation? I'd like to hear any opinions on this. Thank you for your time
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Hi, according to the seller this is a 2 inch Tyrannosaurus Rex tooth from the Hell Creek Formation, Harding County, South Dakota. Really interested in your opinions, thanks.
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Hell Creek Tooth Identification / Antemortem Enamel Spalling
Joseph Kapler posted a topic in Fossil ID
This partial crown was collected from the Hell Creek Formation, Garfield County, Montana. I acquired it for a teaching collection because I think it tells a story. The basal section shows almost an inch in diameter. Is this a Trex tooth? The tooth shows antemortem enamel spalling and wear as described by Schupert and Ungar, 2005. It feels as though that the tooth was broken as a result of probably bone crushing and was worn smooth with continued feeding, then shed some time later. I would appreciate your thoughts..thumb.jpg.ad9ae103b28b2aee15ea0ae162813c04.jpg)
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Good evening to all my paleo peers! Tonight I’d like to share with you a selection of some of my favorite fossils found this year. I was lucky enough to spend three weeks in Montana over the summer, along with a few other fossil hunting opportunities here and there. As we hop into the New Year I'll kick things off aptly... Frog Radioulna-Judith River formation, Montana One of my all time best single fossil hunting days was spent in late June on a microsite in the Judith River badlands of northern Montana. Among the teeth of crocs, hadrosaurs and dromaeosaurs was this absolutely tiny limb bone. When reviewing my finds from this week I gathered up several of these micro bones and put them in a gem jar. I brought this minute group along with a small portion of my collection on my recent visit to the Carnegie Museum of Natural History. While exploring their collections I met amphibian expert Amy Henrici, who recognized it as the distinctive fused lower arm bone from a frog, also known as a radioulna. Yesterday I was able to take clear, close up pictures of this tiny limb on my digital microscope and subsequently posted it as my fossil friday on instagram (same username). I was excited to learn about its identity as it’s the first example of a frog fossil in my collection that I’m aware of! This little guy would have likely been on the menu for a whole host of predators, including Dromaeosaurs and Troodontids. The recent discovery of Daurlong provides evidence of a predator prey relationship between these two groups.
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Hey all, Curious to know your thoughts on this tooth. The low CHR is tough... CH: about 13mm adding 1mm for worn tip CBL: 8.5mm CBW: 4.0mm Mesial serration density: 5/mm Distal serration density: 4/mm
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Identification Teeth of Nodosaurids are often confused for those of their rarer relatives, the Ankylosaurids, namely the archetypical Ankylosaurian, Ankylosaurus. (Most) teeth of Ankylosaurus are taller than they are wide, are generally conical in shape with one side flatter than the other, have large denticles on the anterior and posterior edges (6-8 anterior, 5-7 posterior), and have swollen/bulbous bases. Tooth wear is normally on the crown face, compared to wear on the tip (apex) as in Nodosaurids.1,2 Comments This tooth is partially rooted; the root is cylindrical and hollow. There is a wear facet on one side, offset from the center, with grooves roughly perpendicular to the apicobasal axis (suggestive of the mastication motion). This tooth was found in the same county as the holotype of this species. References 1. Carpenter, K. "Redescription of Ankylosaurus magniventris Brown 1908 (Ankylosauridae) from the Upper Cretaceous of the Western Interior of North America." Canadian Journal of Earth Sciences (2004), 41(8): 961-986. https://doi.org/10.1139/e04-043 2. Carpenter, K. "Baby dinosaurs from the Lance and Hell Creek formations and a description of a new theropod." Contributions to Geology (1982), 20: 123–134.
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