24cm Mooreoceras? Nautiloid
Found in the Iola formation, which I can only assume is a very rare find in the formation as I have never seen one of this size in at least 5 years of rockpile hunting. The only id I could think of was maybe Mooreoceras as some Winterset Limestone contains some in a similar size range. It is hard to make out, even I at first thought it was just karst but the present of shell material and a Siphuncle has proven this to be here. I may try and prep it out a bit more one day.
Shell material and a bit of the siphuncle visible (left)
Siphuncle close up
From the album:
Missouri Ammonoids, Nautiloids and Gastropods
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- Taken with samsung SM-A326U
- Focal Length 4.6 mm
- Exposure Time 53/10000
- f Aperture f/1.8
- ISO Speed 32
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