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Temporal range: Ordovician
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Orthocerida
Family: Proteoceratidae
Genus: Gangshanoceras
Zou, 1988

Gangshanoceras is a fossil nautiloid cephalopod genus included in the orthocerid family Proteoceratidae. It has been found in Ordovician rocks dated from about 478.5 to 468 Ma in China, and from rocks dated slightly younger, about 468 to 461 Ma in Argentina. Six species are known. The type is Gangshanoceras jurongense. [1][2]