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Showing results for tags 'dromaeosaurid'.
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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
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Here is a really interesting bone. Despite being pretty small and a partial bone, this would be an excellent addition because you can get a great look inside of it. This is the type of bone that lends itself to some serious teaching I think. It is from Garfield County in Montana, Hell Creek Formation. 1 7/8" x 5/8" x 5/8". It is small and partial but it appears to be in excellent condition. It is listed as a raptor bone and my limited knowledge says that is a possibility. It sure looks like a theropod of some sort (bird, troodontid maybe I do not know). I would love to hear any and all thoughts on this one !!
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Hi all, I have a tricky tooth ID question. For now it is labeled as Theropod indet. and I guess this is as far as it gets, but I just want to check if someone else gets a Dromaeosaurid vibe =) It was found in the Lourinhã Formation. Crown height is 6mm. Denticles per 1mm are 9 mesial and 7 distal. Mesial denticles are also much shorter, and the mesial carina ends at about half way from the anterior of the tooth (maybe 2/3 considering the tip is missing). Distal denticles are slightly hooked towards the anterior. I went through quite some papers from similar aged formations in Portugal/Spain and Morrison formation but without any real luck: Zinke 1998 describes possible Dromaeosaurid teeth that might fit the bill regarding denticle density and roughly TCH/FABL/BW when scaled to this tooth (6.09mm/3.61mm/1.95mm). Any help is highly appreciated!
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A totally AWESOME addition to our dinosaur collection
fossilsonwheels posted a topic in Member Collections
I recently added a Dromaeosaurid vertebra to our collection. I honestly did not bother with specs once I got it confirmed as Dromaeosaurid. I never asked size or what formation. I assumed it was from Judith River because it was sold as Dromaeosaurus. i knew it was going to be Dromaeosaurid indet so I was not worried about the specific ID. It is a raptor fossil so I wanted it. The vertebra arrived today and I got two very pleasant surprises. It is bigger than I thought. It is also not from Judith River or the species known from that formation. We got a Dromaeosaurid vertebra from the Hell Creek formation Many of our fossils end up being listed as a indet species. This one went into our official inventory as Dromaeosaurid indet. An indet species gives us some degree of latitude with our programs. I assign species to many of them such as Medusaceratops or Zuul from Judith River so that we can teach the kids dinosaurs they do not know about. When I first saw Hell Creek on the paperwork, I thought "Great, we have a vert to add to our Acheroraptor display which contains a single tooth." I began to think that I should assume it is from Acheroraptor because I had run across a published paper about a reconstruction of Dakotaraptor's tail. I thought it might be a good idea to reread that paper and see what information it provided. Our caudal vert is 5 cm long. Much to my surprise, that is right in the middle of the size range for a Dakotaraptor caudal vertebra according to the reconstruction (if I read the paper right). Now I am not saying this is a Dakotaraptor vertebra. I am nowhere near qualified to make that call. I also doubt I am lucky enough to find a fossil of that species by total accident lol I am also not qualified to say for sure that this is not a Dakotaraptor fossil. As an educator, this gives me a really awesome option. I am now considering that this may be an opportunity to add Dakotaraptor to our program with a fossil that MAY be from the giant raptor. Kids would dig that and it gives us the chance to talk about how the science, and art, of describing dinosaurs works. I think I am going to to print up the paper and give kids the information from it. They can see the fossil and come to their own conclusions. We do this with the lineage of Great White sharks. We show the kids teeth from a GW, a Meg, and a Hastalis. They can make their own conclusions though 80% of the kids the other day believed hastalis is the ancestor of the GW. It was a fun thing to do and it would work very well this fossil too. Dakotaraptor has been high on my list to add but I thought it would be down the road. I do not think there is any problem with introducing this fossil as possibly being from Dakotaraptor. Either way, we added an really cool fossil that I am super stoked about. Here is our Hell Creek Dromaeosaurid indet vert. Is it Acheroraptor or Dakotaraptor ? I am going to let the kids decide which awesome raptor this fossil is from.
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All of these items are from the same dealer and I am looking for some ID help. I researched these as much as I could on my own but I can only get some far with the knowledge I have. All of these come from the Judith River formation. For our education programs to really be solid, we need to expand beyond just teeth. We do have an Edmontosaurus jaw fragment and will soon have some Ceratopsian frill pieces plus some bones fragments from the Morrison Formation. I think it would be a good idea to augment the small dromaeosaurid teeth we have a bone or two so I am trying to understand this part of dinosaur collecting better before I make a purchase. I do not want to repeat the error I made with the Troodon vert (which did have a happy ending as the dealer graciously agreed to exchange that for a frill piece). Any help on this is greatly appreciated. The first one is listed as a the pedal phalanx from a Dromaeosaurus. I looked over as many photos as I could find of dromaeosaurid phalanx bones. It does look similar to several photos I found. I have a few questions on this one. Is this the phalanx of a dromaeosaurid dinosaur ? Second question is more of a general question. Can you even determine a genus or species based on an isolated phalanx? The second one is listed as a distal caudal vertebra of a Dromaeosaurus. This one was far more difficult to find anything to reference on the internet. I found nothing that could give me an insight as to whether or not this is a dromaeosaurid vertebra. Is this is from a dromaeosaurid dinosaur or any kind of theropod for that matter ? I have a pretty good idea now of what to ask dealers when it comes to theropod teeth but isolated bones are pretty new to me. Are there questions that I can ask of the dealer to further the ID process? Thank you in advance for any assistance you can provide
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Seeking some scientific information about Judith River dromaeosaurids
fossilsonwheels posted a topic in General Fossil Discussion
I was hoping somebody on TFF might be able to point me in the direction of any scientific papers, research or information that members here might have put together regarding dromaeosaurid theropods from the Judith River formation. This is not really about identifying any teeth, though I do have one from that formation. I am starting to do my research for the education program and am looking for scientific information. From what I can gather, there is a possible Saurornitholestes species and of course the dinosaur I have seen referred to as Julieraptor, which is a interesting story all on its own. I have also seen Dromaeosaurus listed from that formation. I would like to sort out what is known and unknown from the formation and the best way to present our "raptor" tooth to the kids. Any help links or suggestions as to where I might find more information on this would be much appreciated -
And now my last fossil for the night, one of my favorite fossils in my collection ever is the theropod claw my dad found (I always give credit when he's the discoverer) in the Lance fm. of Wyoming the summer before last. It was identified by the guide as potentially being a Nanotyrannus hand claw but I wanted to confirm that with other members on TFF. It's about 2.5 cm in length.
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- anzu
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Tooth of a velociraptorine raptor. Specifically the serrations of the tooth are typical of Saurornitholestes.
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Me and my 7 year old boy went looking for fossils many times. We found a claw tip and a claw mid section from two separate expeditions in two different areas within the river valley a kilometer apart. I believe we have a sickle claw tip from one hand of a dromaeosaur and a sickle claw mid section from the opposite hand. I would appreciate any additional id that could be made from these photos.
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- belly river group
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Always like to see discoveries of dinosaur material from the east coast especially from North Carolina. Here, the first definitive occurrence of a dromaeosaurid from the Tar Heel Formation is reported on the basis of a tooth from a fairly large member of that group. The tooth described in the paper is intermediate in size between those of smaller dromaeosaurids like Saurornitholestes and gigantic forms like Dakotaraptor. https://www.paleowire.com/just-out-a-giant-dromaeosaurid-from-north-carolina-cretaceous-research/ Paywalled paper https://www.sciencedirect.com/science/article/pii/S0195667118301253
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Dakotaraptor Tooth For Sale
Troodon posted a topic in Is It Real? How to Recognize Fossil Fabrications
I noticed a Dakotaraptor tooth for sale and caution anyone interested in it to do a bit more homework before you buy. Dakotaraptor teeth are difficult to diagnose and can easily be confused with Nanotyrannus teeth. These teeth have been very difficult to find and are prized but be patient and be sure its the real deal. If interested my suggestion is to obtain more information on the tooth: A photo of the mesial carina. On the holotype the mesial carina typically ends 1/3 from the base A closeup pictures of the mesial and distal denticles, see below on what they should look like. Not box shape like Nano. From the photos provided it might look right but need that closeup A serration count midline of both edges 5mm wide. Being a Dromaeosaurid the serrations are larger on the distal carina than mesial one. . Denticle shape from DePalma paper included in my topic shown below.jpg.4ce5e8b0998bb10491597bd8658234dc.jpg)
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OK, I know it's gonna be an Abelisaurid, gotta check with you guys though! Pictures should say it all.
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Tyrannosaurid tooth: 1.75"
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- cretaceous
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Partial right humerus (upper arm) of an undiscribed Dromaeosaurid. The size is very similar to that of Bambiraptor. This animal was possibly just over a meter long.
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Partial metatarsal of a Theropod dinosaur. Probably from a Dromaeosaurid. Very similar to metatarsal II and IV of Velociraptor.
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From the album: Reptile Fossils
Velociraptor mongoliensis A replica of the killing claw and toe digits of a Velociraptor. Original from: Djadokhta Formation, Mongolia Age: Late Cretaceous© © Olof Moleman
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