Cephalopoda - Oncocerida - Graciloceratidae

Full reference: B. Kröger. 2007. Concentrations of juvenile and small adult cephalopods in the Hirnantian cherts (Late Ordovician) of Porkuni, Estonia. Acta Palaeontologica Polonica 52(3):591-608

Parent taxon: Graciloceratidae according to B. Kröger 2007

Sister taxa: Eorizoceras, Graciloceras, Isbergoceras, Kundoceras, Leonardoceras, Piersaloceras, Pomerantsoceras, Ringoceras

Subtaxa: Porkunioceras tuba

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Type: Porkunioceras tuba

Ecology: fast-moving nektobenthic carnivore

Distribution: found only at Porkuni, Siuge Member (Ordovician of Estonia)

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Specimen images are retrieved through the ePANDDA API.