Phthanoncoceratidae Dataset Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities Rank FAMILY Classification phylum Mollusca class Cephalopoda order Oncocerida family Phthanoncoceratidae Name Homonyms Phthanoncoceratidae Evans & King 1990 Phthanoncoceratidae Evans & King 1990 Phthanoncoceratidae