Khyssa Posted August 5, 2016 Share Posted August 5, 2016 (edited) Yesterday I received a box of fossil matrix from fellow forum member Otodusobliquus and I couldn't stop myself from spending a few hours looking through it. The matrix is from the Aquia formation in Virginia and I believe it is composed primarily of marine material. But one of the first fossils I found appears to be a tiny rib done. When I asked Otodusobliquus if he had ever found mammal material in this particular matrix he said he hadn't. But he also mentioned that the overlaying Nanjemoy formation did include mammal material and it was possibility that something from that formation got mixed into the matrix he sent to me. This leads me to ask is what I found truly a rib bone? What creature it might it belong to? The scale is in mm and I apologize that the pictures aren't as crisp as they should be. On of these days I will find a way to take clear pictures of my tinier fossils. Edited August 5, 2016 by Khyssa Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 I also found a range of tiny sharks teeth, many of which have intact cusps. Can anyone help identify them. The first three pictures are all of one tooth, they rest in this post are of a second tooth. Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 Pictures 1-3 go together. Pictures 4-6 go together. Pictures 7-9 go together. Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 These are all of the same tooth which was the most difficult one to get somewhat clear pictures of. Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 And one last tooth. Link to comment Share on other sites More sharing options...
tmaier Posted August 5, 2016 Share Posted August 5, 2016 Maybe it is a fish rib bone? Link to comment Share on other sites More sharing options...
old bones Posted August 5, 2016 Share Posted August 5, 2016 Might that be a fish spine? A pectoral, instead of the usual dorsal ones we find so often... I think the 3rd. shark tooth is a Squatina. Link to comment Share on other sites More sharing options...
SailingAlongToo Posted August 5, 2016 Share Posted August 5, 2016 Khyssa, I hunt / collect on the section of the Potomac River with Aquia and Nanjemoy exposures fairly regularly and I personally know of 2 different terrestrial mammal teeth that were found along there late spring - early summer of this year. There was also a ~1" piece of jaw bone with tooth sockets from a small mammal found along the same area during the same time period. All 3 of these specimens were found on the beach so it's difficult to identify which specific layer they came from, but terrestrial mammal fossils have been found in the area. TFF member Marco Sr. does a lot of work with micro-fossils especially sharks teeth so you may want to PM him. He is also very familiar with the Aquia and Nanjemoy of the Potomac so he can probably help you there too. Just my 2 cents, which of course is always free. Jack Don't know much about history Don't know much biology Don't know much about science books......... Sam Cooke - (What A) Wonderful World Link to comment Share on other sites More sharing options...
Al Dente Posted August 5, 2016 Share Posted August 5, 2016 Not sure of the IDs of the teeth in post #2. Post 3 looks like Brachycarcharias lerichei for the first and Odontaspis winkleri for the others. Post 4 is Squatina with a bent crown. Post 5 is Pachygaleus lefevrei. www.elasmo.com has a good section on Aquia teeth. 1 Link to comment Share on other sites More sharing options...
MarcusFossils Posted August 5, 2016 Share Posted August 5, 2016 (edited) For post 1: It's 100% a rib bone, and I'd think it's mammalian. Judging by it's size, I'd say small rodent, perhaps juvenile carnivoran (cats, dogs, fox etc.) For post 2; Striatolamia striata (though really not my area of expertise) for the first two sets. I'm ot sure if the third set of teeth in post 2 would have the same ID. For reference: http://www.thefossilforum.com/index.php?/gallery/image/3612-striatolamia-striata/ Picture: Edited August 5, 2016 by MarcusFossils 1 Website: https://www.instagram.com/paleo_archives/ --------------------------------------------------------------------------- “It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.” ― Edgar Allan Poe Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 Not sure of the IDs of the teeth in post #2. Post 3 looks like Brachycarcharias lerichei for the first and Odontaspis winkleri for the others. Post 4 is Squatina with a bent crown. Post 5 is Pachygaleus lefevrei. www.elasmo.com has a good section on Aquia teeth. Thank you for the IDs. I'm particularly happy that one of them is a pathological! Link to comment Share on other sites More sharing options...
Khyssa Posted August 5, 2016 Author Share Posted August 5, 2016 Thank you for all the information. I am happy that the rib bone was what I thought it was. Link to comment Share on other sites More sharing options...
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