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Photo © mileshankins, all rights reserved
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Description

these shells are not pieces of a bogger shell they are the shell. the locals have never seen these alive and where i find them is in in shell bed accreation areas. i believe they are fossils the estuary is not very old near millions and these shells were quite rare i found 26 of them while finding thousands of different shells.

Comments & Identifications

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the islands i found these on are are pristine uninhabited. they contain only birds reptiles and few mammals. we did see an ocelot and much evidence of coyotes, and raccoons. i saw no evidence of mice. please identify because i believe them to be new extinct specie.

Posted by mileshankins over 4 years ago (Flag)
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I think this might be a sea snail's operculum; the "door" that they can shut their shells with. One side's always completely flat with a snail-spiral pattern, and the other side a half dome. When the dome side is fresh it's often shiny with nice colors, but sometimes I've found old ones and they look like this, with the spiral exposed. Here are some I found in the Indian Ocean:
http://i.imgur.com/SY4ss.jpg
I remember ones from the Pacific looking different, but I didn't collect any of those unfortunately so no photo.

Posted by sea-kangaroo over 4 years ago (Flag)
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Turban Snails - Photo (c) Ria Tan, some rights reserved (CC BY-NC-ND)
jarickards's ID: Turban Snails (Family Turbinidae)
Posted by jarickards 9 months ago (Flag)
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Turbo fluctuosus - Photo (c) Femorale, some rights reserved (CC BY-NC)
invertzoo's ID: Turbo fluctuosus, a member of Turbo Snails (Genus Turbo)

These are opercula (doors) of the turban snail Turbo fluctuosus, which is a common living species in the Gulf of California. :)

Posted by invertzoo 20 days ago (Flag)
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@pliffgrieff , do you agree? Thanks.

Posted by invertzoo 20 days ago (Flag)
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Turbo fluctuosus - Photo (c) Femorale, some rights reserved (CC BY-NC)
pliffgrieff's ID: Turbo fluctuosus, a member of Turbo Snails (Genus Turbo)
Posted by pliffgrieff 20 days ago (Flag)
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Species of Turbinidae have distinctive opercula; these are fairly diagnostic for Turbo species and this is the one in this area.

By the way, there's a great color plate in a research article found here- http://mollus.oxfordjournals.org/content/early/2007/03/19/mollus.eyl032.full.pdf, that shows the variety of opercula in Turbinids.

Posted by pliffgrieff 20 days ago (Flag)
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Yes that paper contains a really great color plate of opercula from this family!

Posted by invertzoo 20 days ago (Flag)
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Wow, gorgeous!

Posted by sea-kangaroo 20 days ago (Flag)
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Turbo fluctuosus - Photo (c) Femorale, some rights reserved (CC BY-NC)
Community ID: Turbo fluctuosus, a member of Turbo Snails (Genus Turbo)
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invertzoo pliffgrieff 2 people agree
Turban Snails - Photo (c) Ria Tan, some rights reserved (CC BY-NC-ND)
jarickards's ID: Turban Snails (Family Turbinidae)
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