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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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- post oak creek
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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. -
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 ridg-
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- ptychodus atcoensis
- ptychodus
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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 ridg -
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. -
From the album: Post Oak Creek
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From the album: Post Oak Creek
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- scapanorhynchus
- cretodus
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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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I’ve decided to post this one separately. Very unusual composition. If you watch the video, you’ll see that light refracts off of tiny crystals in the center of each segment (which I’ve circled in red in another image). It’s hardly noticeable. The specimen is very smooth and rounded. Another member said in a different post of mine that it could possibly be an inoceramid hinge, though my own research resulted in nothing. I can’t find anything online that remotely resembles my specimen (inoceramid or otherwise). I found it at Post Oak Creek in Sherman, Texas. FullSize
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I’d like for my Post Oak Creek collection identified (specifically the shark teeth), but I can’t find much information online about the species of shark whose teeth are found here (Post Oak Creek in Sherman, Texas). When I HAVE come across general information about the creek and other peoples findings online, there aren’t any pictures of the teeth or nobody else knows exactly what they have. It’s also hard to tell if I’m grouping them correctly, so I apologize if I’m mixing some species together. The longer teeth have very similar characteristics, but greatly differ in size. And the only teeth
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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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Hello again forum! Remember that bucket “goodie bag” I took home from the torn up Post Oak Creek a few months ago? I finally went through it and found some excellent stuff! (Im actually wow’d with some of this stuff because I’m just an amateur!) Surprisingly- I found tons of other stuff that ARENT shark teeth for once! I grabbed a 5 quart bucket and took a big shovel scoop of gravel/mud from various parts of the entrance of the creek where the construction was and some from the first sandbar. Im working on an educational frame display I might actually eventually donate (there IS
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From the album: Post Oak Creek
Rhinobatos teeth are so small they make me angry Here you see a dozen guitar fish teeth sitting on the face of a dime! The largest is a bit under 1 mm tall. R. incertus has a pointed crown, R. caseiri has no point. -
From the album: Post Oak Creek
Various denticles from sharks and rays sitting on the face of a dime. -
From the album: Post Oak Creek
A small "bamboo" shark, just 1 mm tall. -
From the album: Post Oak Creek
The shell of a "foram" (test). It looks like a snail or ammonite, but is actually a marine protist (only found in the oceans). -
From the album: Post Oak Creek
Tiny sawskate oral teeth - less than 1 mm in size.
