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Showing results for tags 'theropod'.
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From the album: Dinosaurs
A theropod tooth I recently acquired from the JRF. Sold as a juvenile Tyrannosaurid, but I'm not fully convinced. -
@Troodon I suppose this is the one-decade-later version of the same tooth I posted earlier? Hell Creek formation, Garfield co, Montana CH: 12.7mm CBL: 7.2mm CBW: 3.5mm Mesial serration density: 8/mm Distal serration density: about 4/mm Thanks!
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This reminds me of those specialized Acheroraptor premax 2 teeth (for preening?). I'm never seen one for Saurornithelestes, but I suspect that's what this is. I don't know if Dromaeosaurus has anything like this. Judith River formation, Hill co, Montana CH: 7.3mm (I added 0.3mm for tip wear) CBL: 4.8mm CBW: 2.3mm Mesial serration density: 4.8/mm Distal serration density: about 9.5/mm
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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: Triassic
From the "dawn" of the Dinosaurs, this small tooth represents an early theropod. Unlike the other serrated archosauriform teeth present in the formation, this tooth is ziphodont - thin and labio-lingually compresed - the archetypical tooth form that most theropods adhered to since their beginnings.-
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- bull canyon
- bull canyon formation
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Is this a authentic spinosaurus vertebrae? Found in Kem Kem formation Morocco
prehistoricpeasant posted a topic in Is It Real? How to Recognize Fossil Fabrications
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So I've got this theropod indet tooth that's from the elrhaz formation, or so the seller claims anyway. The tip is missing and I'm wondering if it's due to feeding wear or erosion? The tooth seems to have been quite worn by the owner, the distal carinae is almost worn away, but i suspect it's also eroded some. The angle of the break makes me think it's feeding wear, but il not certain. Any help is appreciated! @Troodon @pachy-pleuro-whatnot-odon
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Hello, Any thoughts on what animal this bone comes from? Judith River Formation, North of Havre, MT close to the Canadian border About 1" long Thanks,
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Can’t figure this one out. Maybe a limb bone but definitely theropod. Dinosaur park formation
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Hey all, I found something similar to a claw today and I’m wondering if there’s a possibility. Maybe a foot claw if it is but I don’t know what it could be. There’s quite a bit of ironstone on it so it’s hard to say. Dinosaur park formation.
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This has the size and J-shape cross section of a dromie premax. It also has the protruding mesial carina that you can see from a distal view. What do you think? Hell creek formation, Carter co, Montana CH: 15.6mm CBL: 6.7mm CBW: 4.7mm Mesial serration density: 6.5/mm Distal serration density: 3.5/mm
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- hell creek
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This has the size and J-shape cross section of a dromie premax. It also has the protruding mesial carina that you can see from a distal view. What do you think? Hell creek formation, Powder River co, Montana CH: 14.8mm CBL: 7.0mm CBW: 5.3mm Mesial serration density: 4.66/mm Distal serration density: 3.20/mm Thanks!!
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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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- hell creek
- hell creek formation
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Would love to hear what do you think of this one? Hell creek formation, Carter co, Montana CH: 11mm CBL: 5.8mm CBW: 2.6mm Mesial serration density: about 5.3/mm Distal serration density: about 4.3/mm Thanks!
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Tyrannosaurus shoulder blade
heZZ posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi, i found this fossil for sale and i'm curious is it real, how much original bone is present and has the picture been edited?
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Hi, Looks like Rex to me. Hell creek formation, Powder River co, Montana CH: 22mm CBL: 11.1mm CBW: 6.3mm Mesial serration density: 15/5mm Distal serration density: 14/5mm
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Hi, What do you think? Hell creek formation, Harding Co, South Dakota CH: 13.4mm CBL: 7.3mm CBW: 3.0mm Mesial serration density: about 5.5/mm Distal serration density: about 4.4/mm
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Hi, Not sure this is identifiable. Rex? Possible huge raptor indet? Hell creek formation, Garfield co, Montana CH: about 27mm CBL: 11.1mm CBW: 6.2mm Mesial serration density: about 3.4/mm Distal serration density: about 2.6/mm
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Hi, What do you think? Hell creek formation, Powder River co, Montana CH: 11.2mm CBL: 5.9mm CBW: 2.9mm Mesial serration density: about 7/mm Distal serration density: about 4.3/mm Thanks!
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Hey all, Curious to get your thoughts on a new addition: Tiourarén formation, Niger CH: 35mm (very rough estimate) CBL: 19.2mm CBW: 9.7mm Mesial serration density: 1.5/mm Distal serration density: 1.6/mm Transverse undulations present Mesial carina extend to approximately 2/3 down
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Hi everyone! I recently acquired this from the Hell Creek of Carter County. I assumed it was a juvie Rex and but was asked to check the serration density and it came back weird so I thought I'd ask for some input. I'm hoping I can at least rule out Nano which I will be shocked if this even has the possibility of being Nano. We might be looking at another "Larsonraptor" situation (if you know you know). CH is 26 mm CBL is 11 mm CBW is 8.18 mm mesial serration density is 14 for 4 mm distal serration density is 10.5 for 4 mm DSDI is 4/3 Any insight is appreciated as always!
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Hey all, Curious to get your thoughts on a new addition: Tiourarén formation, Niger CH: 44.2mm CBL: 24.2mm CBW: 10.1mm Mesial serration density: 14/5mm Distal serration density: 13/5mm Transverse undulations present Mesial denticles extend to the base, more fitting for the Morrison formation The preservation isn't what I'm used to from the Tiourarén formation, but I've seen some that are similar. Thanks!!
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what kind of tooth is this? If anyone knows, please let me know. Thanks in advance! It's hard to tell, but I'll be posting more detailed images later!
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Are these fossil footprints real? If anyone knows, please let me know. Thanks in advance!
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Small theropod claw?
BirdsAreDinosaurs posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi all. This little claw (1.6 cm) from the Kem Kem beds is claimed to be a theropod claw. Is that correct? Is it possible to id it to family level? Out of curiosity, I was also wondering if it is possible to tell apart avian and non-avian theropod claws. If so, how can you tell? Thanks!
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