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Trochidae ID help
01-03-2014, 06:19 AM,
#1
Trochidae ID help
Hello,

Please help me to identify this shell.
It's about 25 mm.

[Image: Trochidae1_zps021588fd.jpg]

Thanks,

Mark
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01-03-2014, 03:13 PM, (This post was last modified: 04-02-2014, 12:31 PM by paul monfils.)
#2
RE: Trochidae ID help
I believe this is Omphalius nigerrimus, a member of a rather confusing group of Trochidae. They are closely related to Tegula and Chlorostoma species, and in older books you sometimes see them all lumped together under Tegula. Also you may see this species listed as Chlorostoma nigerrima. It's a confusing group because quite a few species are similar to one another, and some of them are also quite variable within a species. However, only a few species have the vertical ribbing on the whorls like this one.
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01-05-2014, 06:49 AM,
#3
RE: Trochidae ID help
Hello Paul,
Thank you very much.
Unfortunately too much seashell confusing for me. I can use the net for id only and often a common species makes me trouble.
Regards,
Mark
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