Arizona Rex Posted May 31, 2017 Share Posted May 31, 2017 Good afternoon, Please help to identify the bone in these pictures. I was told the bone was collected in Colorado, and that it is a bone from a dinosaur in the stegosauri family - not stegosaurus itself but another in the line of dinosaurs with spiked tails, and approximately 130 to 65 million years old. I'm attaching several pictures including some that were taken through my jewelers loop. One of those shows the surface of the bone itself, three more show structure inside the bone and some crystal structures. Your help is greatly appreciated Link to comment Share on other sites More sharing options...
Miocene_Mason Posted May 31, 2017 Share Posted May 31, 2017 I don't know much about stegosaurs but from pictures it seems like this isn't a spike, they don't have a root like that(here's a pic). Maybe a hip bone, I don't know how to differentiate between ornithischians. It's been a while since I did bone Id, so here's a picture with the bone darkened, the pointy one (I'm not gonna even try to remember the name). 1 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Arizona Rex Posted May 31, 2017 Author Share Posted May 31, 2017 Hello, Thank you for your reply - your photos are fantastic! I was initially told this is some sort of tail spike but my best guess is the same as yours - a hip bone. I'm almost willing to go a step further and say pubic bone, only based on some photos and illustrations I found online. Thank you for your help. Link to comment Share on other sites More sharing options...
LordTrilobite Posted May 31, 2017 Share Posted May 31, 2017 This is the ulna of a horse. It's normally fused to the radius. but it's broken of from this specimen. Sorry, no dinosaur. Radius and ulna of a horse. 2 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Miocene_Mason Posted May 31, 2017 Share Posted May 31, 2017 Well then I guess I'm completely wrong. You win some you lose some. 1 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Arizona Rex Posted May 31, 2017 Author Share Posted May 31, 2017 Thank you, I can see the similarities but my sample doesn't look exactly like the horse ulna posted. My sample seems thinner and overall flatter. Again by doing some internet searches I see just as strong a resemblance to various stegosauria / ornithischian pubic bones. Link to comment Share on other sites More sharing options...
LordTrilobite Posted May 31, 2017 Share Posted May 31, 2017 Oh it's definitely an ulna. As far as I know horse is the only type of animal that has an ulna that is fused to the radius this way. True it does have some vague resemblance to the pubis of a stegosaur. But the fat end is very clearly that of an ulna. I too am having trouble finding good images for horse though. Here's another image. I can't find any good photos. Though there are a lot of drawings. I'm still pretty sure it's a horse ulna. 1 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Arizona Rex Posted May 31, 2017 Author Share Posted May 31, 2017 After much more looking online I can see much closer similarities to horse and/or deer unla than dinosaur. Thank you for helping to identify this piece. With the information I had I could only direct my search to one type of animal. Though I did find pictures of dinosaur pubic bone that closely resembles my piece, I found pictures of horse and specifically deer ulna that appear to be an exact match...minus the radius. Thanks again! I've got a question I'm not sure should go on the forum - is there a way to respond in private? Link to comment Share on other sites More sharing options...
Miocene_Mason Posted May 31, 2017 Share Posted May 31, 2017 @Arizona Rex Yes you can private message (PM). Just press the message button on the persons profile screen. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Arizona Rex Posted May 31, 2017 Author Share Posted May 31, 2017 Excellent - thank you for your help. Link to comment Share on other sites More sharing options...
LordTrilobite Posted June 1, 2017 Share Posted June 1, 2017 Ah yes I hadn't thought of deer. Yeah, that could be a possibility as well. Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
hxmendoza Posted June 4, 2017 Share Posted June 4, 2017 Definitely not Dinosaur. And it looks more recent. Pleistocene or younger. I'm with @LordTrilobite Link to comment Share on other sites More sharing options...
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