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Showing results for tags 'dromaeosaurid'.
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Hi everyone, seller claims this was found in the Hell Creek Formation, and that it is from a Sauronitholestes, the tooth measures up to approximately 3/16”.
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From the album: Hell Creek Formation Microsite
Acheroraptor was a small theropod (dromaeosaurid) "raptor" that lived in the same paleo-ecosystem as T. rex. Its blade-like serrated teeth possess diagnostic apicobasal ridges.-
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- acheroraptor
- acheroraptor temertyorum
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From the album: Hell Creek / Lance Formations
A small Acheroraptor tooth with diagnostic longitudinal ridges. Found in a channel deposit.-
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- acheroraptor
- acheroraptor temertyorum
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Olá, recentemente vi à venda este dente de dromeossaurídeo da formação Hell Creek, tem 0,27 polegadas. Foi encontrado no leste de Montana. Gostaria de saber se pode ser um aqueroraptor ou algum troodontíde? Hello, I recently saw this dromaeosaurid tooth from the Hell Creek formation for sale, it is 0.27 inches. It was found in eastern Montana. I would like to know if it could be an acheroraptor or some troodontid.?
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Hi There - I came across this nice looking dino bone identified as "The top section of a pubis bone from a Dromaeosaurid." This bone was found in the Hell Creek Formation in South Dakota. It looks like a nice piece with minor repair, but I wanted to get some second opinions on whether this is a piece of a pubis bone, or possibly a chevron... or something else. I'm also curious if folks agree with the the ID of dromaeosaurid (unable to ID beyond the family). What do you think? Thanks!
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From the album: Hell Creek / Lance Formations
A small tooth from a Dromaeosaurid "raptor" dinosaur, located in an anterior position in the mouth. Found in a channel deposit. -
For those of you that collect material from Uzbekistan this is interesting. The attached "PAYWALLED" paper describes a very large Digit II-2 phalanx that belongs to a giant Dromaeosaurid. The article also raises questions around the recently described Ulughbegsaurus uzbekistanensis but need to read the publication if I can get my hands on it. https://www.cambridge.org/core/journals/geological-magazine/article/abs/giant-dromaeosaurid-theropod-from-the-upper-cretaceous-turonian-bissekty-formation-of-uzbekistan-and-the-status-of-ulughbegsaurus-uzbekistanensis/4543ABAB1EC19C84405EDF66A5F53124#
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- bissekty formation
- dromaeosaurid
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These teeth were sold as a baby tyrannosaurid and a dromaeosaurid/bird respectively. Some other specimens from this lot have been posted here if I recall. But they are from North of Havre, Montana close to the Canadian border. Apparently they are from quite an old collection from around 1950-70s. The provenance should place it solidly in Judith River Formation. Since these teeth were selling somewhat quickly, I just grabbed them and decided on figuring it out later. The first tyrannosaurid tooth does have some similarities to Dromaeosaurus with the mesial twist, but I could be wrong. The second tooth is a bit more confusing. I'm guessing it is Zapsalis-type with those striations which would make it Saurornitholestes. I don't think it's bird compared to bird teeth from other deposits. It's probably not one of those Campanian microraptorians either, and it's probably too big even at this size to be bird or micro. 1st tooth: Length=6.3mm; Distal Density=17.5/3mm; CBL=2.9mm; CBW=1.8mm 2nd tooth: Length=5.8mm; Distal Density= ±11-12/mm (?); CBL=2.6mm; CBW=1.3mm Serration density for the 2nd tooth might not be too accurate since it was extremely difficult to even get to that number. Not sure how to go about getting CH, but it's probably a little bit more than the length since the tips are worn. 1st tooth might be good as is since with that small root section, that probably makes up for what would be a longer crown. 1st Tooth 2nd tooth
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From the album: Hell Creek / Lance Formations
Even in the final years of the non-avian dinosaurs, the paravians remained diverse, with many species represented in the famed Hell Creek formation.- 1 comment
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- acheroraptor
- acheroraptor temertyorum
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This small tooth was found in powder county, it measures a little over half a inch and I wanted help with identification . Seller listed as either Nanotyrannus or Tyrannosaurus rex. I also think it’s most likely tyrannosaurid, and I wanted to know whether it’s tyrannosaurid and if it is whether it’s more likely to be Nanotyrannus or Tyrannosaurus rex. Im assuming it’s just a indeterminate tyrannosaurid because of the base damage and size, but please let me know you opinions.
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From the album: Hell Creek / Lance Formations
As a theropod tooth aficionado, I thought it useful to compare two families present in the Hell Creek Formation. They become increasingly difficult to distinguish as they get smaller, but this graphic presents some features which may be used to differentiate them on two similarly-sized exceptional specimens. Keep in mind there is some variability due to position, ontogeny, etc., so it's beneficial to study more than one tooth for each family.-
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- dromaeosaur
- dromaeosaurid
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Hi all. Another Kem Kem tooth that I find hard to ID. I would say definitely not Abelisaurid. When comparing this tooth to the photo's in Troodons Kem Kem theropod topic I fine it hard to find a good match. The tooth is 3 cm long. Thanks again!
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Since I bought a couple of (very nice) Abelisaurid teeth from Kem Kem, which I initially thought where Dromaeosaurid, I am on the lookout for potential Dromaeosaurid teeth from Kem Kem. I think this tooth (1.9 cm) might be a candidate, but I have been wrong before. What are your thoughts? Should I ask for better pictures of the serrations or a serratiom count?
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I recently bought these three little teeth (between 1.7 and 2.0 cm long). They are from the Kem Kem Beds in Morocco. They were advertised as Dromaeosaurus teeth, but I know that is not very likely or well supported. I think the first two teeth might be Dromaeosaurid (mesial and distal serrations are different and the tip of the teeth extend past the base) and the third one might be Abelisaurid (distal side is almost straight). But I could very well be wrong, so I would like to hear your opinions. Thanks!
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Identification A. temertyorum is characterized by the typical Dromaeosaurid traits (compressed, recurved, differing mc/dc serration densities), and longitudinal ridges/facets on the crown face. Notes This tooth was found this past Summer ('21), and in the same county as the holotype specimen.
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- acheroraptor
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From the album: Dinosaurs
Acheroraptor temertyorum Hell Creek Fm., Garfield Co., MT, USA Note the diagnostic ridges. -
Identification: This is a typical Dromaeosaurid tooth, with the serrations being differently-sized on each carina; the denticles are much smaller on the mesial carina compared to the distal carina. There's also slight recurvature, which is common in Dromaeosaurs. There are no other features present that allow for identification beyond Family. Described Dromaeosaurs in the Hell Creek Formation include Acheroraptor temertyorum and Dakotaraptor steini. Because both of their known dentitions are incomplete, this tooth may belong to either, or another undescribed Dromaeosaur. Identification further discussed here. Notes: CH: ~ 10.5 mm CBL: ~ 6 mm CBW: 3 mm Mesial denticle density: 8 / mm Distal denticle density: 4.5 / mm There is some minimal feeding wear on the tip, but this tooth is otherwise flawless.
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- c(hc)d1
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Hi y'all, I picked up this gorgeous Dromaeosaurid tooth. It was listed as Acheroraptor and I bought it thinking it was one. However, upon receiving it and taking some measurements, I believe it may be a candidate for Dakotaraptor steini, as it virtually matches one in @Troodon's collection in every metric. It has a semi-oval base, with no ridges or facets commonly seen on Acheroraptor. The mesial carina is straight, and terminates almost 1/3 the CH from the base. Dromaeosauridae Hell Creek Fm., Carter Co., MT, USA CH: ~ 10.5 mm CBL: ~ 6 mm CBW: 3 mm Mesial denticle density: 8 / mm Distal denticle density: 4.5 / mm Distal serrations: Mesial serrations: Base: This is the other tooth I'm referring to:
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Hi everyone. Tonight I'd Iike to share my most recent find: an absolutely tiny theropod tooth I found late at night sorting through what remains of the Aguja fm. matrix I purchased last year. I knew it would pay to be thorough and I was delighted to see the glint of enamel in a triangular shape eventually appear. Additionally, it has just taken the crown (no pun intended) for smallest theropod tooth in my collection, at only 2 mm in length and just over 1 mm in width. I'd be interested in reading your opinions on it's identity, I'm thinking either dromaeosaur or troodontid but I'm not sure. A pic of the tooth after isolating it from the surrounding dirt. Now compared to my other tiny Aguja tooth And my previous smallest tooth from the Lance
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- aguja fm
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Hi TFF, I am a Dromaeosauridae enthusiast and have been collecting online for a little while now. I want to thank the members here for getting me educated on so many aspects of fossil teeth identification. I want to share my small collection in the hopes this is helpful for some of you in the future. Your critical input is highly appreciated, as always! #1 First up, one of my treasures, a robust Deinonychus antirrhopus tooth from the Cloverly Fm. A big thanks to @StevenJD for letting go of this one – much appreciated! Note the asymmetry in the placement of the carinae, best noticeable from the top view. #2 Representing the Judith River Fm., a cornerstone of my collection, a 1st left premaxillary tooth of Dromaeosaurus albertensis. I just love the way the mesial carina ‘folds’ onto the lingual surface. #3 Another premaxillary tooth from the Judith River Fm., a Zapsalis abradens with prominent ridges. The mesial carina has a nice twist, the cross section looks rather symmetrical, so likely not a 1st or 2nd premax. Distal denticles are hooked towards the tooth tip, but no mesial denticles are present and the tooth is not recurved. So, for now it is labeled as cf. Zapsalis abradens after Currie and Evans 2019, but could eventually be re-labeled as Saurornitholestes langstoni.
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- acheroraptor
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The first juvenile dromaeosaurid (Dinosauria: Theropoda) from Arctic Alaska is presented in this paper. Paper https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0235078 Article http://www.sci-news.com/paleontology/alaskan-saurornitholestine-dinosaur-08618.html Inreresting tooth
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A new domaeosaurid, Dineobellator notohesperus, consisting of a partial skeleton from the Upper Cretaceous (Maastrichtian) of New Mexico, the first diagnostic dromaeosaurid to be recovered from the latest Cretaceous of the southern United States. The holotype includes elements of the skull, axial, and appendicular skeleton. From the Ojo Alamo Formation Dineobellator notohesperus Article https://phys.org/news/2020-03-feathered-dinosaur-surviving-raptors.html Smithsonian Mag. Article https://www.smithsonianmag.com/science-nature/dineobellator-dinosaur-new-mexico-180974511/ Paper https://www.nature.com/articles/s41598-020-61480-7
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- dineobellator notohesperus
- dromaeosaurid
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Hi all, I have been staring at this tooth for quite a while now with question marks in my head. It was found in the Bissekty Formation, Kyzylkum desert, Uzbekistan. It's 27mm long (1.01 inch) and properly labeled as Theropod indet. However, the seller raises the possibility of it being a Dromaeosaurid. Serrations do look different in length and width, a count on screen gives me distal 13/5mm and mesial 16/5mm. What throws me off is the rather 'stout' crown and round cross section, more Tyrannosaurid in my view. However, I have no reference images and the only publication I found (Sues and Averianov 2014) is not exactly helpful. I posted available images - I could contact the seller if additional information is required. Any input is highly appreciated.
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- bissekty formation
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Here are some photos of some of my dromaeosaurid fossils from the Aguja Formation of Brewster County, Texas.
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Listed on everybody's favorite auction site as a Dromaeosaur or Tyrannosaur tooth. 1/2" long theropod tooth. Hell Creek Frm, I believe it said South Dakota but I will double check that. It was very inexpensive so I went ahead and bought it. If nothing else, seems an excellent candidate for some analysis and it was a good way to test what I have learned without breaking the bank lol So lets see if I have gotten better at this. I believe it is Dromaeosaurid based on the difference in serration size and density. The seller posted good pictures so I could count the denticles. No exact scale in mm but the count was done mid tooth. Distal= 12 Mesial=14/15 The mesial serrations look pretty straight. The denticle shape does not look like the Acheroraptor teeth I have and the density difference is less too.I am not seeing ridges. It does seem to be compressed as a Dromaeosaur would be. I know there will be some work to do when it is in hand with measurements and checking out the base. My smartest option is to tag @Troodon and get his opinion lol For now I will go with Dromaeosaurid indet. I think it could be a DR candidate. Either way, it is a nice tooth with nice serrations and a bargain to boot
