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  1. Dino Dad 81

    Chunk of centrum?

    Hi all, This chunk is from the Lance of Weston county, WY. Is there enough here to conclude that this is a chunk of vertebra centrum? Is is spongy enough to conclude it's theropod? If so, is it big enough to conclude it's from T Rex?
  2. FF7_Yuffie

    Lance Formation Tyrannosaur Tooth

    Hello everyone, A Tyrannosaur tooth here, it measures 1.1 inches, and is from Wyoming (Weston County) Lance Formation. If anyone can ID it as Nano or T-Rex, that would be much appreciated. There some very slight serrations, which I have zoomed in on. Thanks for the help.
  3. 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 s
  4. Jurassicbro238

    Lance Formation skin impression?

    Hello! I was wondering if this is a soft tissue impression. The specimen is about 2cm long and I think the rock around it is sandstone. It was found in Niobrara County, Wyoming in the Lance Formation. I would like to know what you all think!
  5. Dino Dad 81

    T Rex tooth

    Cracking open Heterodonty in T Rex for Joseph's tooth was fun enough that I wanted to take a look at this tooth and see if you have any suspicions on position @Troodon. From the Lance formation in Weston, WY CH: About 45-46mm CBL: 21.4mm CBW: 15.5mm Mesial Serration Density: 1.8/mm Distal Serration Density: 1.9/mm Thanks!!
  6. Dino Dad 81

    Possible dino teeth

    Hi all, Here are some of the last from the mystery box from Weston co, WY, Lance fm. They look like a couple of herbivore teeth and a few carnivore teeth fragments to me. Possibly robust enough to have to come from T Rex, if so...? Thanks, 1a 1b 1c 1d 1e 1f 2a 2b 2c 2d 2e 2f 3a 3b 3c
  7. Dino Dad 81

    Egg Shell take 2

    How about these? They're also from Weston co Wyoming (granted I bought these two, whereas I dug the previous-posted tooth and non-eggshell). Since we don't have anything from Lance to compare to, I suppose I'm really asking: (1) is it egg shell? (2) is it dino? (3) have you seen anything like it from JRf or HCf?
  8. Dino Dad 81

    Egg Shell?

    Once more to squeeze in. This too is from the Lance formation, Weston co, WY. It's about 14mm X 7mm X 2mm. Is it an egg shell? Thanks,
  9. Dino Dad 81


    Hi all, Any thoughts on who this little guy might come from? It's 9mm long x 4mm wide x 4mm tall. It comes from Lance, Weston county, Wyoming. Thanks!
  10. Dino Dad 81

    Chunkosaurus from Lance

    Hi All, Curious to know if this hunk of chunkasaurus from Weston county Lance formation can be place in a family. Also, I marked a set of holes along the top to see if you think they could be tooth marks.
  11. Dino Dad 81

    Fascinating coprolite or egg?

    It's hard to capture the beauty of this thing in pictures. Could it be an egg? Just a fascinating coprolite that shows its contents?
  12. Dino Dad 81


    This thing looks pretty bizarre. It's very dense, and has no tongue-sticking, so I think it's just a strange looking, bad-tasting rock. Every time my son or I tried to see if there was any tongue-sticking on the small black section, we were running to the kitchen to wash our mouths out--very sour, metallic taste. I'm worried we tasted dino poop. Or is this just some rock that should have stayed in the ground?
  13. Dino Dad 81

    Chunkosaurus from Lance

    Hi all, My son and I recently got the incredible opportunity to live the dream and break into rocks from the Lance formation in Wyoming ourselves in the comfort of our own living room--thanks to a special member on TFF ! We came across this Chunkosaurus piece last night. If there's enough material here to ID (even just the family it comes from), we'd be thrilled to hear your thoughts. In my novice eyes, it looks like it may be a chunk from the perimeter of a Triceratops frill. One typically expects to see the curvature at the perimeter of the frill having the opposite o
  14. WyomingRocks!

    'Twisted' Claw Help needed - Lance Fmtn

    Hello, here is a new type of claw for me. I found it a couple days ago in a Lance Fmtn site I have in Wyoming. This claw is 1" long. It has an unusual 'twist' to it in that the left side drops down if you are looking at the point view. Almost like it is 'torqued'. Please let me know if you have any info. Is it turtle, crocodile, or dinosaur related? Thx!
  15. Nanotyrannus35

    Possible Partial Triceratops Horn?

    I'd gotten some more lance fm matrix and had found this. It had at first looked like a rib fragment but it has this weird texture on the bottom and the sides. Just wondering what you guys think. Thanks for any help. It's from the Lance Fm of Weston Co. Wyoming.
  16. ThePhysicist

    Meniscoessus tooth

    From the album: Hell Creek / Lance Formations

    Meniscoessus was a large multituberculate mammal (large by Cretaceous standards), identified by the crescent-shaped/grooved cusps. Looks like a right M2 (right 2nd lower molar).
  17. ThePhysicist

    T. rex tooth chunk

    From the album: Hell Creek / Lance Formations

    For most collectors, it's more affordable to have a piece of a T. rex tooth if you just want it represented. This one is clearly T. rex: it's theropod with serrations (this one has the basalmost portion of the mesial carina), very thick, and clearly would've had a large circumference. Note also the large angle made by the curvature of the tooth at the carina (not Nanotyrannus which have narrow, blade-like teeth).
  18. I'd found this bone in some lance fm matrix. It's straight and has a weird blob at the end, so it's kind of matchstick shaped. Was thinking it could be a fibula or an ulna. Thanks for any help.
  19. Nanotyrannus35

    Weird Lance fm piece of bone

    I'd found this bone looking thing in some lance fm matrix. I can tell it's bone because the bottom has the bone texture. It seems to maybe be trike frill, ankylosaur osteoderm, or something pachy. Location is weston county, WY. It's about an inch long. Thanks for any help.
  20. Seanrad09

    Another Lance Fossil

    Got another one than has me stumped from the Lance in Wyoming… any ideas guys? Thanks!
  21. Nanotyrannus35

    Possible Theropod Tooth?

    I'd found this partial tooth from the lance formation and was wondering if it would be identifiable. It's pretty partial so I wouldn't be surprised if it's unidentifiable. Here are the pictures The side The front The top And the bottom Thanks for any help.
  22. Nanotyrannus35

    2 Lance fm Vertebral Arches

    I have found 2 vertebral arches in my box of matrix from the lance fm. I was wondering if it is possible to identify the arches without the centrums. Here are the pictures, the fossils are from weston county, wyoming Vertebral Arch 1 And vertebral arch 2 Thanks for any help!
  23. Nanotyrannus35

    Lance Formation Vertebra

    I had found this vertebra in the box of matrix I'd gotten for my birthday. I think that it might be either a crocodile or a Pachycephalosaurus caudal vertebra, I was hoping that you guys might be able to identify it. It was found in the Lance formation of Weston County, Wyoming. Here are the pictures. Scale is in millimeters. Thanks for any help!
  24. So what is the difference between the lance fm and the hell creek fm? They both have the same dinosaur species and from what I can tell, other vertebrate species. The only difference that I can think of is that the lance fm is in Wyoming while the hell creek fm is in South Dakota, Montana, and North Dakota.
  25. Nanotyrannus35

    Richardoestesia Tooth?

    I'd found this partial tooth in some lance fm matrix. It doesn't look like crocodile so I think that it might be Richardoestesia. Here are the pictures. It's about a half inch long.
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