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spotted this online, claims to be a dinosaur jaw from hell creek, but is it actually from a dinosaur, surely it could be from a croc aswell, anyone more knowledgeable have a better id?
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Identification According to Dr. Dave DeMar's ID guide for Hell Creek microfossils, frog jaws have a bumpy labial surface (unlike those of salamanders or lizards). Comments Frogs have small and fragile skeletons, so identifiable remains are uncommon, especially in the Hell Creek formation where the preservation bias seems to favor large-bodied animals.
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From the album: Hell Creek / Lance Formations
An overlooked member of this ecosystem - the humble frog. The night soundscape may have been dominated by them and insects, as in many forested/swampy ecosystems today. -
From the album: Hell Creek / Lance Formations
During my first pilgrimage to the Hell Creek formation, there were some fantastic sunsets.- 4 comments
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I'm interested in this rib end from the Hell Creek formation of South Dakota and was wondering if there was any way to identify the species. I've compared it to several large species that were native to the area and in my opinion, this piece compares very well with tyrannosaurus. Then again I'm no expert and would very much appreciate a second opinion. I've included examples of ribs from each species I compared it to.
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I have some pieces of dinosaur bone from the Hell Creek formation with curious divots. Is there a nice guide on the forum (or elsewhere) for assessing whether these might be bite marks? I realize that IDing the biting species (if there even is one) can be difficult/impossible. But I would love to read an explainer that lays out the principles for assessing the likelihood that particular marks come from predation/scavenging. I have used the search tool, but only found discussions around specific specimens.
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From the album: Hell Creek / Lance Formations
Pectinodon (meaning "comb-tooth") is a tooth taxon, since no remains attributable to the genus beyond teeth have been found. Pectinodon seems to be a rare member of the Hell Creek fauna, with their teeth being fairly uncommon (though being so small, I'd guess that few people actively search for them). It was a small Troodontid theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid cousins (Torices et al. (2018)). This coupled with their small size suggest that Pectinodon was a small/soft prey specialist, preferring the rodent-sized mammals of the time, lizards, insects, etc. Some researchers have proposed omnivory as a possibility for Troodontids (cf. Holtz et al. (1998)). Troodontids famously are regarded as among the most intelligent dinosaurs for their large brain size / body size ratio. This notion serves as fodder for speculation that had the dinosaurs not gone extinct, Troodontids (Pectinodon being (one of?) the last) would have continued to grow in intelligence and develop sentience and civilizations. Troodontid teeth like Pectinodon can be easily identified by their small size, exaggerated, triangular, apically oriented posterior serrations.-
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Tyrannosaurus rex (Osborn, 1905) Late Cretaceous, c. 67 Ma Hell Creek Formation, Isabel, Dewey Co., South Dakota, USA. It has been a dream since childhood to own a Tyrannosaurus rex tooth and my dream came true with this recent acquisition of a gorgeous T. rex 1.5” dentary tooth.
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Hello everyone Below are a few photos that I'd like some IDs on (if possible) from my trip with Paleo Prospectors to Garfield County, Montana back last month. We were fossil hunting with the ranch owners permission on private land in Hell Creek exposures. Row 1-Likely theropod/raptor toe bone and two theropod/raptor broken limb bones? Row 3-Small bones with odd texture/shape Row 5-Small broken limb bones? Row 7-Small crocodilian vert and small fish verts Thanks for looking. Feel free to request more photos (clarity, different angles/sides, etc.) if you see something odd or cool. Also found some nice teeth (likely nanotyrannus, ceratopsian, and gator) and a bunch of other cool bones. Can't wait to head back with them next year.
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Been looking through some of my old Hell Creek Formation fossils I collected near Glendive, Montana a few years ago and these are a few vertebrae I found but could never ID. I can provide any additional photos needed. Thanks!
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There are road trips and then there are road trips. I've planned many a family vacation without a single mistake. Sometimes we hit a hitch if the plane gets rerouted due to weather or something. As much as I love Chicago, I avoid it not because strange things happen when we get too close. (I'm a little concerned about what tomorrow may bring as we pass close by.) But, it was never due to my poor planning. The last two weeks have been crazy! I had it all planned out around being in the Black Hills on Monday and Tuesday of this week. Five days out from approximately Philadelphia, five days in South Dakota, and five days home with a day to sleep off the trip before Rick went back to work. I checked the itinerary twice. I asked my hubby, Rick, to double check it. We hit the road. The first few days went as planned. If this is Saturday, this must be Ohio kind of things. We spent the night in a castle and fossil hunted at a dam spillway in Ohio. We looked for more fossils along a waterfall in Indiana. We spent the night in a wacky, artic themed hotel room in Illinois. We visited a cave in Minnesota and looked for more fossils. We camped out in Buffalo Gap National Grasslands and looked for gemstones. It was all going swimmingly. The first goof was missing lodging for a night in South Dakota. No biggie. we'll just find a place for the night, although if I had figured it out, I would have opted to sleep under the stars in the free campground at the national park for an extra day. At least we had a nice shower. It also gave us extra time to admire the geology of Spearfish Canyon, complete with a run down the natural waterslide at "Devil's Bathtub." Two days later, we got to the field station for our Hell Creek dinosaur hunt, the whole reason for the trip. We got there 15 minutes early… and waited. Eventually we realized that people should be there by now and checked the reservations. It wasn’t Monday and Tuesday, it was Tuesday and Wednesday. Oops. This means that everything for the rest of the trip is now off by a day and the lodging for this leg of the trip dries up a night earlier than we need it. We decided to camp out in the Spearfish municipal campground the last night in SD. I rested a continuing migraine and Rick sat down to Google Maps and Expedia to figure out the rest of the trip. The Hell Creek Hunt was freaking awesome and will get its own trip report, but the highlights included unearthing a big fossil log along wit a triceratops tooth, a champsasaurus tooth, a 66-million-year-old turtle toe bone, and a rather large log that will probably take years to fully excavate. The next big thing on the agenda was hunting with a fellow fossil buff I’d met on The Fossil Forum. He lives on the Iowa/ Minnesota border. Somehow, when was copying and pasting Google maps told me that I needed to go to Indiana, not Minnesota. Well, that puts a monkey wrench in things! We rerouted everything and I sent my fossil friend a message about the change in plans. Then I forgot to hit send. I wondered for two days why he did not reply. Finally he asked if I was still coming. I said yes, we’d be out his way tomorrow; that we were on our way to DesMoines, a few hours away. Well, It IS a few hours away, but we were already EAST of him and had no buffer time before Rick had to be back to work on August 1st. So, this is the one thing we just had to skip. BOO! Crossing my fingers for our next trip west, @minnbuckeye SO, now we are playing the next few days by ear as we hop from DesMoines to somewhere to Cleveland and then home. Do I dare to try Mazon Creek in the heat of summer with a million ticks? Brave my Chicago jinx? Find crazy roadside attractions and just stop as we see signs? Only tomorrow will tell. Regardless, we’re having a ball. The roof rack on our minivan is loaded with fossils and pretty rocks. We got loads of sunshine. We have stories to tell. It’s all good.
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I saw this for sale and was wondering if anyone could verify that this is indeed part of a pachy skull. It looks right to me, but I just wanted to make sure. It’s from hell creek formation. Thanks!
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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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From the album: Hell Creek / Lance Formations
Microfossils are the means by which we can most fully appreciate the diversity of a past ecosystem. From salamanders to Tyrannosaurus, an ancient river captured and preserved dozens of species that lived in Montana 66 million years ago, at the terminus of the time of dinosaurs. In this small collection alone, I count at least 27 species of dinosaur, lizard, crocodile, fish, shark, salamander, turtle, mammal, and mollusk.-
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Sorry if this should be posted elsewhere... I found a 3ft long hadrosaur (pretty sure) tibia and fibula with associated tendons. I'm in Northern California and looking for complete prep. I prefer rack fill and stablilization with similar color but otherwise no color changes. I also have a triceratops tib/fib that needs the same. (about 30 inches tib and fibula missing five inches or so). I have strange fossil finding luck. Maybe next time a Rex tib/fib. The hadrosaur bones are jacketed and weigh about 180 lbs. The trike bones are foil wrapped. Anyone know anyone anywhere close?
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From the album: Hell Creek / Lance Formations
A river-tumbled Nodosaurid tooth (cousin of the club-tailed Ankylosaurids), possibly Denversaurus. Found in a channel deposit.-
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From the album: Hell Creek / Lance Formations
One species I was hoping to find - a small Orectolobiform shark from the Hell Creek formation. It was named in 2019 for its teeth shaped like the spaceships in "Galaga." Amended from Gates 2019: “Orectolobiform shark possessing the following autapomorphies: central cusp with distinctly swollen lingual face forming a clearly demarcated constriction, or neck, between the cusp and the root; labial surface of central cusp ornamented with a raised ridge or closely arrayed plications, which in most cases are distributed in such a pattern as to follow the slope of the heels; convex heels, well developed both mesial and distal to the central cusp with a distinct convex angle mid-distance along slope seen in anterior teeth and some lateral teeth. This taxon is further differentiated by the following suite of shared characters: anterior teeth possess distinct, high central cusp; heels on lateral teeth slightly serrated; heels of anterior teeth and some lateral teeth do not slope gradually toward root lobes, but are instead squared-off or rounded at their terminus; one or two rounded diminutive cusplets may be present although this trait varies among individual teeth; apron is generally broadly rounded and shows a bifid habit on some but not all specimens; root lobes enlarged on [labial] side of tooth compared to more constricted structure on [lingual] side, bestowing an exaggerated heart-shape in basal view; a central foramen pierces between the root lobes with the foramen divided by thin struts in some teeth.”-
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From the album: Hell Creek / Lance Formations
Richardoestesia teeth have very fine serrations. A couple of mm of the tip was reattached after I found it in the matrix I was scrupulously searching. -
From the album: Hell Creek / Lance Formations
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From the album: Hell Creek / Lance Formations
A monitor lizard from the very end of the Cretaceous. The carinae are slightly serrated, and in basal view the mesial carina projects from the silhouette like a wing. -
From the album: Hell Creek / Lance Formations
Among the iridescent mollusk shell shrapnel, lies a molar from a small Cretaceous mammal. -
From the album: Hell Creek / Lance Formations
A hybodont "shark" found in a channel deposit. This was among the last of the hybodonts - a group that spanned nearly 300 million years before going extinct along with the non-avian dinosaurs 66 million years ago.-
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From the album: Hell Creek / Lance Formations
An Orectolobiform shark that swam the rivers of the Hell Creek ecosystem. Their teeth closely resemble those of the modern carpet shark, the "wobbegong." This was found in matrix from a channel deposit. -
Could it be possible that the Hell Creek Microraptorian could be synonymous with Paronychodon or Richardoestesia?
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Hello, as I have seen the spitter tooth with triceratops horridus as id that you can see online from hell creek can only be Id as ceratopsian. Then is this picture correct or is there someplace with the posible ceratopsians from hell creek?
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