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Found 53 results

  1. Not sure how many have see this Devian Art Representation of the Dinosaur fauna in the Hell Creek & Lance Formations. It's Paleop interpretation of what he believes exists. Download the image in the link to see it best. Not everything he shows has been officially described but the number and type look pretty good. It's pretty cool The image is the link
  2. Troodontids certainly are one of my favorite dinosaur families. Intelligent and what a set of chompers to eat you with, all you can ask for in a cool dinosaur. Will start this with the Pectinodon teeth in my collection and will continue to add as I take photos. This species has some of the coolest teeth. Pectinodon bakkeri is the only named Troodontid in the Hell Creek and Lance Formations. This is a tooth taxon and its teeth are significantly much smaller than its big cousin Stenonychosaurus. Lance Formation Hell Creek Formation A couple of the teeth in matrix are partially rooted which is extremely rare since the teeth are so small Hell Creek Formation - Powder River County Hell Creek Formation
  3. T-rex Skull Untombed

    The discovery of the Tyrannosaurus rex led by a team from the Burke Museum made news last year. I've attached some photos of the preparation of the skull provide by the Burke Museum to show their progress with this dinosaur They have named this animal "Tufts-Love Rex" after Jason Love and Luke Tufts, the two volunteers who discovered it. Lower Jaw is exposed from its tomb. What a beautiful set of chompers The Skull is next. Maxilla More will follow as work continues..... @Pagurus
  4. A very brief article about the "Chicken from Hell" Anzu wyliei found in the Hell Creek Formation. Added some of my photos to get a better view of this cool Dinosaur. Carnegie Museum Article http://carnegiemuseumnaturalhistory.tumblr.com/post/165688152585/anzu-wyliei-perhaps-better-known-by-its-colorful/amp?__twitter_impression=true 5 feet high at the hips. Hand Claws reached 7 inches long
  5. Documented in this paper is baby hadrosaur that represents the first occurrence of an articulated nestling dinosaur skeleton from the latest Cretaceous (late Maastrichtian) of North America. It's from the Hell Creek of Montana, Garfield County. Edmontosaurus annectens Red... Scapula Purple.. Vert column Green..Pubis Blue.. Femur & Tibia Journal of Vertebrate Paleontology. ....Paywalled for non members.. A nestling-sized skeleton of Edmontosaurus(Ornithischia, Hadrosauridae) from the Hell Creek Formation of northeastern Montana, U.S.A., with an analysis of ontogenetic limb allometry Mateusz Wosik,Mark B. Goodwin &David C. Evans http://www.tandfonline.com/doi/abs/10.1080/02724634.2017.1398168?journalCode=ujvp20#.Wog2CXWObFg.twitter
  6. BHI Oviraptorid Discovery

    The Black Hills Institute exciting new Oviraptorid discovery this year in the Hell Creek Formation is far far from completion but Pete Larsen has been keeping everyone appraised of its status. Its still mostly in matrix and the arduous task of preparation as just begun. A new species or a new Anzu wyliei skeleton, it looks different. Not as sexy as Tuffs Love T rex skull but scientifically import. Here is a good look at what it takes to extract one of thess raptors. The site a Hell Creek lake deposit Airbraide-airpen outside, slowly making progress to keep the dust down Screening clay filled "mud" collected at the Oviraptorid site and soaked in water for a week. Hoping for bone fragments. The mud is then scooped into a screen Sprayed with water to reduce the clay and mud Slowly the clay breaks down and washes away This is all that's left of 5 gallons of surface scrapings. Hopefully when finished screening the 20 gallons of mud, some bone will be found Cleaned up the tibia-fibula-astragalus-calcanium block with 5 gastralia Working on the Oviraptorid pelvic and neck block. Nice preservation, but some of the matrix is siderite concretion. Airscribe work. Hard tedious work to extract each piece. Lots of skull elements I've circled the lower jaw among skull elements
  7. Only two Ankylosaurs are reported from the Hell Creek and Lance Formation the Nodosaurid Denversaurus schlessmani and Ankylosaurid Ankylosaurus magniventris. I've identified my material to reflect these dinosaurs and if additional ones are discovered will change my identification. Material from these dinosaurs are extremely difficult to find with Teeth and Scutes being the most common. Bones are extremely rare. My Tail Club - also have a container full of isolated pieces that go to the missing portion. A few representative scutes from my collection. Most come from one area and are most likely associated. Have +30 from this site. One of my dinner plate scutes I call this my Bactrian Camel double humped scute. Different locality with a bulbous base.
  8. A humorous, look at experiences on a dinosaur dig crew in the famous Hell Creek Formation of Eastern Montana. This short story is bound to bring a chuckle or two to those in the field of paleontology who endure it all in the name of science. Looks like only a Kindle version of . 99 cents by Richard Meyn https://www.amazon.com/Road-Hell-Creek-Volunteer-Dinosaur-ebook/dp/B078ZQ8J3C/ref=sr_1_1?s=books&ie=UTF8&qid=1516142474&sr=1-1&keywords=road+to+hell+creek
  9. Hi all, I have a group of dinosaur teeth that needs identifying. They are either triceratops or hadrosaur teeth. They come from Hell Creek Formation of Powder County, Montana. All the teeth are roughly 1.5 cm tall 1) I am guessing hadrosaur 2) I am guessing triceratops 3) I am guessing triceratops 4, 5, 6) These 3 are extremely similar. I can't tell what they are.
  10. 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 Troodontid?
  11. A member asked me to check out some auction offerings for Morrocan Dromaeosaurus teeth and I did and they of course they were improperly identified. Not being familiar with the identification of these teeth I tried to help him by checking around on different dealer websites and was appalled at what I found. What I refer to as key dinosaur suppliers, on the web, were selling Dromaeosaurus teeth from the Hell Creek Formation of Montana. What makes me more upset is that I told one of them that they do not exist. All the listings were beautiful teeth however they were not Dromaeosaurus but looked like Nanotyrannus. Reminder to all those that are interested in purchasing teeth or bones from the species Dromaeosaurus it does not exist in the Hell Creek Formation or Lance Formation or Morocco. That species can only be found in the States from the campanian deposits of the Judith River Formation and Two Medicine Formation of Montana. Canada also has a number of formations where it can be found also in Campanian deposits but you rarely see them offered for sale. The Hell Creek and Lance Formations have only two Dromaeosaurids described Acheroraptor and Dakotaraptor. So if your interested in purchasing a Dromaeosaurid tooth from those faunas it needs to be from one of those dinosaurs. Since domestic Dinosaur dealers don't seem to have their act together I suggest that you post any interest in these type of teeth here on the forum before you buy to be sure its properly identified.
  12. Only large bodied Ceratopsian have been described from the Hell Creek/Lance Formations like Triceratops and Torosaurus. Small bodied Ceratopsians do exist and isolated material similar to Leptoceratops gracilis is found. I believe the type specimen was discovered in Alberta part of the Scollard Formation which is Maastrichtian in age. Most of these finds are is in the form of isolated teeth however post-cranial material and skull elements are scarce but found. Dealers/auction sellers and collectors have a good understanding of what these teeth look like and the teeth are very distinctive from large bodied Ceratopsians with just a single root. Skull Elements: Isolated Teeth: Post-Cranial Elements
  13. Paper describes shell remains of eight fossils referable to Helopanoplia distincta from the Hell Creek Formation of Montana and North Dakota that, in combination, document nearly all aspects of the shell morphology of this taxon. Helopanoplia distincta is based on just two shell fragments from the Lance Formation of Wyoming. The new fossil material thoroughly supports the validity of Helopanoplia distincta. There is also a very informative map showing where the exposures are of the Hell Creek and Lance Formations. Joyce WG, Lyson TR. (2017) The shell morphology of the latest Cretaceous (Maastrichtian) trionychid turtle Helopanoplia distincta. PeerJ 5:e4169 https://doi.org/10.7717/peerj.4169
  14. Hi there, I'm new to the fossil forum, and was hoping I could get help in identifying this jaw. It was found in Marmarth, North Dakota in the Hell Creek Formation. I don't have any more specifics on location besides that. I hope the pictures are detailed enough, but if not, I can post more. I am thinking it has to be some kind of fish, but I am not completely sure. Any direction or help would be wonderful! Thank you so much!
  15. Hello, where can I buy dinosaur fossils from the Hell Creek formation for fair prices? I am having trouble finding a website that offers some good dinosaur fossils.
  16. Albertonykus borealis was theropod described by Philip Currie and Nicholas Longrich in 2008 from the lower Maastrichtian of the Horseshoe Canyon Formation in Alberta. Its range also extends into Montana, SD and Wyoming in the Hell Creek and Lance Formation. It is noted for having a single hand claw and is a very small theropod, see photo. Very few folks pay attention to small dinosaurs but this one is very cool and material does come out all of the time so I thought it might be interesting to post. If you collect North American dinosaurs the claws are a must have. Teeth have been found on its Asian cousin Mononykus olecranus but no cranial elements to my knowledge have been found in North America. Maybe one of our forum members can find one or has more information to add. Material found in the Hell Creek and Lance formation should be labeled as cf Albertonykus borealis since nothing has been described from these localities. I've seen hand and foot claws as well as phalanges sold but few sellers know what they have and label them theropod. I've personally collected some specimens and have purchased others. Published literature and the New York Museum of Natural History Mononykus display help pull the picture together for identification of specimens. Hand Claw : They are typically recurved but can be straight. A shallow vascular groove on either side, ventral foramens are present, see second photo (arrow) Carpal : Called the Alular digit and just has one. Photos L to R Medial, Ventral and Dorsal Views Associated Alular Digit : Foot digits in the following post.
  17. Bowfin Tooth

    This tooth was found on an anthill. It was donated to the U.S. Forest Service, Minerals and Geology Management Department., Chadron, Nebraska, in July, 2017.
  18. This was found on an anthill in the Hell Creek Formation, SD. A few years ago, a paleontologist at the South Dakota School of Mines looked at it and thought it could be avian. Can anyone out there confirm this? If so, any ideas as to species? Thanks for looking!
  19. A few years ago most of the smaller theropod teeth from the Hell Creek/Lance Formations were identified based on teeth from the Campanian assemblages of North America. Over the past couple of years new discoveries have shed new light on the theropods of the end of the cretaceous and new species have been described. I have addressed these on separate topics but decided to put all of these together to get a better view of the current picture of the upper Hell Creek and Lance formations. If you see any omissions or errors feel free to let me know. Tyrannosaurs: There are two Tyrannosaurs described Tyrannosaurus rex and Nanotyrannus lancensis Teeth of these two tyrannosaurus can be distinguished between one another however there may be some positional teeth that can be difficult and mimic one another. Denticles on both on both anterior and posterior carinae can be identical in size and shape however the carinae on Rex teeth are more robust. Serration count from my examination is not important on smaller teeth. Nanotyrannus teeth typically do not exceed 2 1/2". The best way to distinguish these teeth is to look at how compressed they are and the cross section at the base of the tooth. Rex dentary teeth are oval at the base and maxillary teeth are a bit more compressed. Some maxillary teeth can appear to look like Nano so other features need to be examined like the robustness of the tip and carinae. Nanotyrannus teeth are unique as tyrannosaurd go, they are very compressed across the entire crown and their cross section at the base is rectangular. Basically Rex teeth are fat and Nano are flat. Here are examples of the cross sections at the base of a couple of Rex teeth under 1 1/2" and adult Nano's Rex (teeth are oval but can vary depending on position.) (Maxillary teeth are more rectangular) This figure represents tyrannosaurid teeth from the Judith River but is applicable to T-rex and shows the cross sectional shape at the base for different positions. Morphometry of the teeth of western North American tyrannosaurids and its applicability to quantitative classification Article (PDF Available) in Acta Palaeontologica Polonica 50(4):757–776 · April 2005  Nano (teeth are rectangular) Maxillary T Rex teeth can also take this shape so one needs to consider other features. Looking at compression Rex teeth are fat with robust tips Nano teeth are flatish Aubysodon molnari is a tooth taxon known from unserrated Pre-maxillary teeth. This taxon is a "nomen dubium" dinosaur and premaxillary teeth being sold belong to one of the other two Tyrannosaurs in these assemblages. They should be labeled as "Tyrannosaurid indet" because its impossible to differentiate between species. Albertosaurus sp.is not present in these assemblages Dromaeosaurids: There are only two described Acheroraptor temertyorum and Dakotaraptor steini and Zapsalis sp. is also present. Saurornitholestes and Dromaeosaurs species are not present. Acheroraptor temertyorum Identification: Like all Dromaeosaurid teeth the denticles are key and different between those on the anterior and posterior carinae. You should easily be able to see that the posterior ones are much larger. If the denticles are identical its probably a juvenile Nanotyrannus tooth. Secondly there are apicobasal ridges on the crown which are diagnostic to this species. There can be several on either side and fewer on posterior located teeth. The teeth are recurved and typically under 1/2" (13mm) long. Dakotaraptor steini Identification: Like all Dromaeosaurid teeth the denticles are key and different between those on the anterior and posterior carinae. You should easily be able to see that the posterior ones are much larger. If the denticles are identical its probably a juvenile Nanotyrannus tooth. These teeth are larger than Acheroraptor and lack the ridges seen on the crown. The teeth are recurved and compressed and larger around 7/8" (2-2.3 cm) in the holotype. However dont dismiss smaller teeth, juvenile teeth are around. The holotype serration count per 5mm is (Distal 16-19) and Mesial (19-27) I have yet to find any of these teeth and believe they are not common. Nano teeth can mimic these its all about serrations difference. Zapsalis sp. Identification: Similar to Z. abradens from the Judith River Formation. Very compresses tooth with rounded serrations on the distal side and a smooth mesial edge. One flat tooth surface with longitudinal ridges. Troodontids: There are at least two present Stenonychosaurus sp. and Pectinodon bakkeri. but only one described Pectinodon bakkeri. Stenonychosaurus sp. is an easily recognizable tooth. Denticles strongly hooked and turned toward the tip Pectinodon bakkeri signicantly smaller 6mm or less than Stenonychosaurus teeth. Comb like denticles on posterior carina, lacking on the anterior side.. Positionally these teeth have different morphologies can been see in the photo. Reference from : Vertebrate Microfossil Assemblages by Sankey and Baszio Other Teeth: Paronychodon lacustris type teeth are flat on one side and usually bear three or more longitudinal ridges. The other side is convex and can be smooth or longitudinal ridges can be present as well. Richardoestesia gilmorei. these teeth are quite varied in shape and size and are also common. Some are straight and others are slightly recurved. Denticles are often limited to the posterior carina and individual denticles are minute. If the denticles are present on both carinae they are identical in size. The serrations should look like these (scale .2mm) Richardoestesia isoceles. Typically are very compressed, elongated and form an isosceles triangle. Fine serrations can be present This species along with the Paronychodon is currently under study and will most likely be described to a new taxon which may not be dinosaurian . Albertonykus sp. is known from bones. Its teeth are very small and pointed. Photo of tooth is from the smaller Mongolian species Mononychus olecranus Morph types isolated small theropod teeth are abundant in these assemblages. Morph types exist and determining the taxonomic affinities of these teeth is problematic. So be prepared to identify these teeth as Theropod indet. Note A lot of what I've described here requires a detailed examination of the serrations. The crisper they are on your tooth the better the opportunity you will have to identify them. having some magnification capability helps Bird: Avisaurus archibaldi This tooth is typically sold and known as A. archibaldi. Unfortunately the holotype is known only from one bone a diagnostic tarsometatarsus and NO other skeletal material has been published. So we really do not know if this morphology of tooth belong to this enantiornithine bird. Its probably best ID as Avisaurid indet.
  20. September 2017 was a busy month for me. Worked a day in the Thornton, CO Triceratops dig with other DMNS volunteers and staff. Then headed up with my son to hang out with my friend Walter Stein (Owner of Paleo Adventures), and some of his friends, to help dig at his Tooth Draw Quarry. Several good fossils were found. I found a Nanotyrannus tooth, a Thescelosaurus ulna, and other teeth and small fossils. My best find though, was a very well preserved left dentary from a mammal that may very likely be Didelphodon, or something closely related. Had a fantastic time and and made new and fun friends. Then this past weekend, I went back up to SD by myself, to help my friend Tom Caggiano (Owner of Lost World Fossils) to dig up Edmontosaurus bones at a monospecific bonebed, with some friends of his that have been collecting there for a very long time. Friday was overall a nice day. But we got rained out on Saturday. So we all headed out to Hill City, SD. First we visited with Sandy Gerken. I got to see her fossil prep lab. And several cool fossils she is working on for clients. Then we went to visit BHI and it's museum. Had the guys pose next to the bronze Triceratops skull out front. Also checked out some nice rock shops in the area. On Sunday, weather caused us to have a late start at the Edmontosaurus Bone bed. Worked on trying to fully expose an Edmontosaurus ilium I found on Friday. It turned out to be much larger than we thought. Only had a little more than a half day to work on it so unfortunately, I only got 3/4 of it exposed for removal. I was leaving Monday morning for home, so Tom Caggiano was going to try and finish pulling it out Monday morning before he also leaves. Unfortunately, they got rained out on Monday too. So Ken And Glenn said they would double foil it cover it up for us. I also found a partial Edmontosaurus maxilla, Edmontosaurus sqaumosal, cervical rib, Ischium, small manus phalanx, and a few Edmontosaurus teeth, some with roots. It was a fun trip. It was a pleasure meeting Ken Roblee, Glenn LaPlaca, and @Troodon. All three are very nice gentlemen. They made me feel quite welcome. @Troodon was a pleasure to finally meet up with. He and I spent a lot of time talking about all things dinosaur fossils. Great guy! All four individuals are, in fact, great guys!
  21. Hell Creek Coprolites

    Hi all, I just got back from a fantastic dig near Marmarth, ND. I was in coprolite heaven! I am wondering if anyone has any clues about the round inclusion in the first photo. It is phosphatic. I thought it was particularly interesting because I rarely see inclusions in this type of coprolite. I am also including photos of some of the more interesting coprolites I found along with a really cool ichnofossil found by another member of our group. What is interesting about this one is that it is furrowed on both the rounded and concave ends.
  22. Cretaceous ,seed - Hell Creek

    Out at a hadrosaur dig site and came across this seed. Can anyone identify it? Thanks for looking!
  23. Looks like we will have a new book describing Vertebrate fossils from the Hell Creek Formation courtesy of the paleontologist Thomas Carr and others. What I heard is that the publication is scheduled for this fall, no idea of price. I was able to get a hold of a beta copy while visiting one of ranches I collect on and took some quick phone pictures. I had several reactions when I read the book, the dinosaur section getting poor grades while the other sections were informative. It was the first publication that covered vertebrates other than dinosaurs. The information shown was very descriptive and covers finds collected by the authors group since 2006. The books weakness is that if it was not collected it did not make the publication and the authors did not look to supplement the information. The other weakness is that the photos used were that of the actual pieces collected in what ever shape they were in. For example, they are providing you a guide to an Ornithomimid hands claw only showing you a half of a claw. Here are some pages from the book. Covers fish, lizards, salamanders, crocodiles and dinosaurs. The best part of the dinosaur section was the descriptions of Thescelosaurus foot claws and teeth which I will show on another post. Theropod teeth shown were poor examples and not every species covered. No mention of Nanotyrannus since this author does not support its existence. So the best use of the book is for trying to ID fossils other than dinosaurs from the Hell Creek or Lance Formations. A book that is not all encompassing but few are and should augment other reference material. I will probably purchase this book for my reference library I was appalled at the statements in the front of the book. Most collectors do not have an opportunity to collect this fauna and their only way to enjoy Hell Creek material is to purchase it. Are the writers of this book on such a high pedestal that they look down on everyone else. So who is this book written for? I'm happy to know that the theropod paleontologists that I'm familiar with support and work with diggers and collectors to gain a better understanding of the mesozoic era. Let see what the published book contains this is only a beta version. @LordTrilobite I did scan the book to see if your vertebrae were shown but no luck. Guess they did not find any. REMINDER: This information us from a beta version so it's subject to change
  24. Richardoestesia isosceles?

    Is this a tooth of Richardoestesia isosceles? Scale marks on left side of tooth are in mm and on the right side are in 0.5 mm increments. Serration count ranges from about 6 to 8 per mm. What remains of the tooth is approximately 11 mm in length. Hell Creek Formation (Late Cretaceous: Maastrichtian), South Dakota.
  25. Small Vertebra (Hell Creek)

    Any help on the identity and position of this small (scale bar = 1 mm) vertebra from the Hell Creek Formation (Late Cretaceous) of S. Dakota, would be greatly appreciated. It looks like much of the neural arch and processes are gone. The centrum is a bit more dorso-ventrally flattened as compared to the turtle vertebra I posted the other day, and the ventral side (?) of the centrum has sinuses unlike the turtle vert (perhaps due to wear / breakage?).