From Dave over at the ESCONI Discussion Group:
Info here:
http://www.scienced aily.com/ releases/ 2013/02/13021816 4130.htm
Abstract here:
http://geology. gsapubs.org/ content/early/ 2013/01/17/ G33792.1
Notable because it is the oldest occurrence on record, but hardly a
surprise. Gastropods from Lone Star (Pennsylvanian, Missourian) are
known to retain shell color patterns most likely due to porphyrins,
another biomolecule.
Dave
