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531–899 University Rd, Frid... (Google, OSM) Details Hide details
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Acorn Barnacle - Photo (c) tewksjj, some rights reserved (CC BY-NC-SA), uploaded by Joshua Tewksbury
stingraydoctor's ID: Acorn Barnacle (Balanus glandula)
Posted by stingraydoctor over 4 years ago (Flag)
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Right in the center is Balanus glandula. The height above low tide and the diamond shape opening are the diagnostic characters. There is a Nucella snail hidden in the crevice and another genus of barnacle in the upper left.

Posted by stingraydoctor over 4 years ago (Flag)
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Balanus - Photo (c) Ken-ichi Ueda, some rights reserved (CC BY-NC), uploaded by Ken-ichi Ueda
chriswbrown's ID: Genus Balanus, a member of Symmetrical sessile barnacles (Suborder Balanomorpha)

You're most likely correct, but without seeing the terga and scuta, I'd only be willing to go to genus.

Posted by chriswbrown over 4 years ago (Flag)
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Acorn Barnacle - Photo (c) tewksjj, some rights reserved (CC BY-NC-SA), uploaded by Joshua Tewksbury
stingraydoctor's ID: Acorn Barnacle (Balanus glandula)
Balanus - Photo (c) Ken-ichi Ueda, some rights reserved (CC BY-NC), uploaded by Ken-ichi Ueda
Community ID: Genus Balanus, a member of Symmetrical sessile barnacles (Suborder Balanomorpha)
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chriswbrown 1 person agrees
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