| Pinna affinis is quite a common bivalve, but is not usually preserved in any form other than as decalcified impressions in the clay. The images below, except for one show the condition of this species as most usually found | |
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Just
a few flakes remain
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Again,
a flaky impression
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A
rare example of P. affinis around a phosphatic nodule. The preservation
is almost unique for this species in the London clay
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A
second P affinis, this one on a mudstone, found on the foreshore by
Tony Vale of the MMLS on Monday the 25th. march 2001
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