Flx Posted March 5, 2018 Share Posted March 5, 2018 Hi Below please find some pictures of a toe bone that was found in the Hell Creek formation. Unfortunately I do not have a straight top view or front view. Given the size of 15cm (6 inch), is it save to assume that this is a t-rex phalanx? 1 Link to comment Share on other sites More sharing options...
Pemphix Posted March 5, 2018 Share Posted March 5, 2018 @Troodon... Link to comment Share on other sites More sharing options...
LordTrilobite Posted March 5, 2018 Share Posted March 5, 2018 Yeah I'd say this looks like T. rex. Looks most like the first phalange of toe 2 or 3. Here are some reference photos of the Trix specimen, though the feet are casts of Sue. Left foot. Right foot. More good reference. 5 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Haravex Posted March 5, 2018 Share Posted March 5, 2018 I would agree with this and would lean more towards digit 3 however a ventral view would help to confirm this, also very nice piece was it a personal find? Link to comment Share on other sites More sharing options...
LordTrilobite Posted March 5, 2018 Share Posted March 5, 2018 24 minutes ago, Haravex said: also very nice piece was it a personal find? It's on our favourite auction site. 1 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Troodon Posted March 5, 2018 Share Posted March 5, 2018 I checked out the specimen on eBay and they don't have any additional pictures to add to this discussion. I don't believe the photos are adequate to confirm this is Rex there are a few red flags. The dimple on the Dorsal side just behind the knuckle is not present.. The proximal end on Phalanx 1 really flares out all around Digit III or II and it's hard to determine that other than the ventral side, need a dorsal view. The dorsal side by the distal end is pretty flat which on the examples shown it pretty rounded. The ventral side on the Rex examples are much more U shaped than the specimen which is flatter. Not saying it's not one just need straight on views and the distal side may be very worn. 6 Link to comment Share on other sites More sharing options...
Flx Posted March 5, 2018 Author Share Posted March 5, 2018 I can check if I can get more pictures. Is there another dino in Hell Creek with really large toes (and a similar shape)? Thescelosaurus or nanotyrannus would have smaller phalanges, right? Link to comment Share on other sites More sharing options...
LordTrilobite Posted March 5, 2018 Share Posted March 5, 2018 Thescelosaurus is not very big. It also has quite different toe bones. The dimples on the sides we see here are also pretty typical for theropods. Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
GeschWhat Posted March 5, 2018 Share Posted March 5, 2018 3 hours ago, Flx said: Thescelosaurus or nanotyrannus would have smaller phalanges, right? Here is an example of a thescelosaurus toe bone I found in the Hell Creek Formation for comparison. 1 Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
jpc Posted March 5, 2018 Share Posted March 5, 2018 Could this be an Anzu toe bone? I think it is too big for that. Link to comment Share on other sites More sharing options...
Troodon Posted March 6, 2018 Share Posted March 6, 2018 14 hours ago, jpc said: Could this be an Anzu toe bone? I think it is too big for that. Agree, I have some very large toe bones that look like they belong to Rex but are not. If there is a giant oviraptorid in the Hell Creek like Larsen belives there is might fit that. Again need a better look at this one. Link to comment Share on other sites More sharing options...
Flx Posted March 6, 2018 Author Share Posted March 6, 2018 Anzu... That would be a really massive chicken! Link to comment Share on other sites More sharing options...
Flx Posted June 25, 2018 Author Share Posted June 25, 2018 I took some pictures from all sides. I hope this helps with the ID. The length is 150mm. Link to comment Share on other sites More sharing options...
Flx Posted June 25, 2018 Author Share Posted June 25, 2018 As you can see the bone is a bit worn. Maybe some material is missing. Link to comment Share on other sites More sharing options...
Troodon Posted June 25, 2018 Share Posted June 25, 2018 Great photos. I asked Pete Larsen and its T -rex, Right Digit II, 1st phalange. The features that I mentioned are not fully formed similar to Sue/Stan images because this is from a sub-adult specimen, nice. All about ontogenetic changes 3 Link to comment Share on other sites More sharing options...
Flx Posted June 26, 2018 Author Share Posted June 26, 2018 13 hours ago, Troodon said: Great photos. I asked Pete Larsen and its T -rex, Right Digit II, 1st phalange. The features that I mentioned are not fully formed similar to Sue/Stan images because this is from a sub-adult specimen, nice. All about ontogenetic changes Thank you very much for checking with Pete Larsen. I am happy to have a t-rex fossil in my collection (even though a giant, undescribed oviraptor would have been intriguing as well). Link to comment Share on other sites More sharing options...
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