Unknown Crinoid crown from Ordovician of Morocco: rare!

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Offered is an uncommon item for the specialist crinoid collector; this is a 3.5cm crinoid crown of unknown genus, from the Ordovician, Fezouata Formation (Arenig) of the Zagora area, Morocco.Part of the aboral cup is preserved and all of the arms with filter feeding pinnules are preserved in an orange/brown limonite.No reserve for an unusual and uncommon crinoid from Morocco!