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>I know that colour banding in bivalves and gastropods has been
>recorded as far back as the Devonian. I have also looked at the
>preservation of colour in Pleistogene gastropods from New >Zealand, but have
found that the proteins producing the colour >have decomposed leaving only a
shaddow where once there was >colour. My part of the study was to look at
the animals using UV >light (both living and fossil), but a search for the
'pigment' was >also made. I will try and find out what the results were. I
think >it was published in Science or Nature last year.
How come no proteins for color or pigment for color are found, yet we do have
fossil remains of interference colors , as in mother-of-pearl on shells?
What does the interference preserve that the pigments don't?