sdsnl Posted November 7, 2015 Share Posted November 7, 2015 5-8mm in length, from Okinawa, Japan. I collected the coral piece on a beach; the gastropod shell was bought from a small shell shop with no info. It's very well preserved and retains lots of details so I doubt it is old. Both of them have this little thing stuck on them that's a flat coil resembling ammonites. I see growth lines but no chamber walls. The inside is empty. Tube worms are abundant in the area but I haven't seen any that coil up so nicely...and gastropods coil vertically right? Thank you very much for the help! Link to comment Share on other sites More sharing options...
Auspex Posted November 7, 2015 Share Posted November 7, 2015 Spirorbis, perhaps? LINK 1 "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
sdsnl Posted November 7, 2015 Author Share Posted November 7, 2015 Spirorbis, perhaps? LINK Wow! O_O That's fast! The information is interesting, I will look into it. Thanks so much!!! Link to comment Share on other sites More sharing options...
PA Fossil Finder Posted November 7, 2015 Share Posted November 7, 2015 Tube worms are abundant in the area but I haven't seen any that coil up so nicely...and gastropods coil vertically right? Not necessarily A gastropod (or ammonite) with an extremely short or flat spire is considered "planispiral". When I had an aquarium tank, I used to catch minnows and keep them for a while. I also liked to catch ram's horn snails (Planorbidae) from the local pond. They kept the tank quite clean, and their shells were coiled up like ammonites. I agree with Auspex, these are probably Spirorbis or some other worm shell. 1 Stephen Link to comment Share on other sites More sharing options...
sdsnl Posted November 9, 2015 Author Share Posted November 9, 2015 Not necessarily A gastropod (or ammonite) with an extremely short or flat spire is considered "planispiral". When I had an aquarium tank, I used to catch minnows and keep them for a while. I also liked to catch ram's horn snails (Planorbidae) from the local pond. They kept the tank quite clean, and their shells were coiled up like ammonites. I agree with Auspex, these are probably Spirorbis or some other worm shell. Thanks! I googled them and some really look like ammonites! Those shells would make cool collection items Link to comment Share on other sites More sharing options...
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