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Well....I am really trying my best to figure out this Cretaceous Fish Tooth thing vs Reptile Tooth but I keep getting stumped, So here is another tooth that I am not sure if it's fish or maybe reptile? Plus a couple of shark teeth that I would like confirmation on my ID. PLUS a really cool little sawfish tooth that just seems....different...than the usual Ptychotrygon. Any thoughts are appreciated! Eagle Ford Formation 1. Size 1/4 inch 6 mm It does seem to have a carina ridge but it also has one side slightly sheared off. 2. I have tentatively ID'd the top tooth as Cretodus semplicatus due to the striations on the blade. The second tooth looks so similar, but no striations so is it Cretolamna appendiculata? Size 1/8 3mm 3. Is this a pathological Scapanorhynchus? 4. This tiny little sawfish tooth is one of the most beautiful things I've ever found. The little decor on it is amazing. Is it a Ptychogrygon triangularis which are so common in Post Oak Creek? Plus I just want to show off this amazing piece - I think it's a Gastropod Baniformis that has been entirely replace by crystals!
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From the album: Texas Cretaceous Fossils: Crustaceans
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From the album: Texas Cretaceous Fossils: Crustaceans
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Hello, everyone! Below are a few finds from the North Sulphur River and Post Oak Creek, and I’d love to get some help with identification. The ruler is in centimeters. 1. This first picture includes two mammal teeth (top two)(fossilized or no?), ???, and a small bone that appears to be fossilized. these were found at Post Oak Creek. 2. This bone was found at the North Sulphur River. 3. Nautilus found at NSR. Could anyone help with identifying the species? 4. Jaw fragment? Found at NSR. 5. Coprolite? It appears to have fragments of bone(?) in it. Found at NSR. 6. I found this tooth at NSR a while back, but someone recently IDed it as Latoplatecarpus (mosasaur). I can’t find too much literature on Latoplatecarpus; could anyone give me more information on this tooth and the animal it comes from? Thank you!
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These are my finds from a nice sample of sandy micro matrix from the Post Oak Creek in Sherman, TX. As others have attested, there are many fossils of sawfish to be found at the micro level. I very much enjoyed picking these as I find them as aesthetically pleasing as the denticles that I love to collect. The scale throughout is one millimeter. The stream wear made the ID of the oral teeth a bit difficult at times, so I lumped Ptychotrygon and Texatrygon sp. together. It was a real treat to find these Sawfish Rostral spines which I believe are those of Ischyrhiza texana. I found lots of interesting denticles. The Cantioscyllium decipiens and Chiloscyllium greeni teeth were distinctive enough for me to ID, but the ‘regular’ shark teeth were a bit too worn for me to be sure. Any help there is much appreciated. I think I found at least one Hybodus sp. tooth. (Cretalamna appendiculata ?) The fish material included the ubiquitous Enchodus sp. teeth and palatine bones, many fish coprolites, and lots of otherwise unidentified teeth. I photographed a few the more interesting bones some of which are probably of Pleistocene origin. continued...
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Hello, Looking for help with these Upper Cretaceous shark teeth from Post Oak Creek, Sherman, Grayson Co., TX, USA (Warning: Some of these are heavily eroded). Thank you! Squalicorax? Species? Cretodus or Cretalamna? Mix of both? Scapanorhynchus sp? @ThePhysicist
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Post Oak Creek North Texas Turtle scute or part of vertebrate?
aggie1997 posted a topic in Fossil ID
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Hello all! I did a little sifting for shark teeth today in Post Oak Creek (Sherman Texas) and ran across a piece of fossilized bone I need help identifying… I’m guessing is an arm or leg bone from a small mammal (raccoon, rabbit, squirrel, etc.) but I would love to hear from the brain trust on what this may be. I also added a pic of the larger teeth I picked up today. thanks and have a great one! FreeRangeTraveler
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Exploring a nice sample of Post Oak Creek micro matrix was a new fossil adventure for me. Each new matrix comes with an additional learning curve, and I have managed to identify most of the finds in this one with the help of the excellent collections of fellow TFF members: @ThePhysicist, @JamieLynn, @EPIKLULSXDDDDD, @Jared C, and the informed opinions of @Al Dente and @MarcoSr to name a few. I am also an avid collector of PDFs regarding each new matrix that I explore. I could use some help with these 4 finds. The scale is 1mm in every image. I am having trouble deciding if they are Onchopristis dunklei or Ischyrhiza mira, or something else altogether… Thanks for looking
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My son found these today 4/10/23 at Post Oak Creek - Just curious if anyone can help us identify them. Thanks!!
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I found this tiny tooth while searching through some matrix collected from Post Oak Creek in Sherman, Texas. I believe the formation there is the Eagle Ford Group, Cretaceous. For scale, the grid in the pictures is 5x5mm, the tooth measures just under 3mm. I've been looking into Palaeogaleus and Galeorhinus, but neither seem to fit (I don't see any bulge with a crown that overhangs the root). Are either of these even known from this formation? Any thoughts on the ID of this tooth are appreciated, thanks!
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From the album: Post Oak Creek
P. atcoensis was a rare species of durophagous shark that lived during the Late Cretaceous. Its contemporary P. whipplei was far more abundant and tended to have a higher, bullet-shaped crown; this disparity in morpholgy suggests they may have preyed on different things. From Shawn Hamm's thesis: "Diagnosis. Tooth Crown high and rounded, oriented 90° to the margin area in the medial files; crown crossed by six to eight thick, chevron-shaped parallel ridges; lateral files have moderately high crowns with four to five parallel ridges; posterior teeth are low crowned with two to three ridges; differs from other species as the ridges are thick, chevron shaped and terminate sharply at a coarsely granular and concentric margin."-
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From the album: Post Oak Creek
P. atcoensis was a rare species of durophagous shark that lived during the Late Cretaceous. Its contemporary P. whipplei was far more abundant and tended to have a higher, bullet-shaped crown; this disparity in morpholgy suggests they may have preyed on different things. From Shawn Hamm's thesis: "Diagnosis. Tooth Crown high and rounded, oriented 90° to the margin area in the medial files; crown crossed by six to eight thick, chevron-shaped parallel ridges; lateral files have moderately high crowns with four to five parallel ridges; posterior teeth are low crowned with two to three ridges; differs from other species as the ridges are thick, chevron shaped and terminate sharply at a coarsely granular and concentric margin."-
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From the album: Post Oak Creek
When I initially found this I was hoping it was Mosasaurid, however upon some reading, I decided it's more likely to be a sister group squamate. In particular, the labial sulcus convinced me it is probably C. crassidens (see Caldwell 1999). It is however much larger than any Coniasaurus teeth I've seen published.-
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From the album: Squamates
When I initially found this I was hoping it was Mosasaurid, however upon some reading, I decided it's more likely to be a sister group squamate. In particular, the labial sulcus convinced me it is probably C. crassidens (see Caldwell 1999). It is however much larger than any Coniasaurus teeth I've seen published.-
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek