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Showing results for tags 'pinna'.
Found 3 results
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From the album: Texas Cretaceous Fossils : Bivalves - Clams
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It is found in the same supposedly delta setting, together with plant branches, sphenophyllums, crinoids, and marine and non-marine shells. any idea what it could be? I am just guessing it is fall-off from some fern plant. The finest mark is 1mm.
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So, I have the ID on these, Pinna sp., pen shells from the late Cretaceous in NM, but now I have found not one, but two that appear to have other bivalves in them. Since bivalves have numerous ways in which they can be motile, is it fair to say that they done got they-selves stuck in the pen shells? The only other option, which seems unlikely, is that this is some internal structure of the pen shell. Most complete pen shell (L) and broken shells with internals (R ) and (FR):
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