Cambrian cephalopods are presently reported only from tropical, carbonate platform successions that occur on a number of paleocontinents. Outside of West Gondwanan occurrences on the eastern Sino–Korean Platform in China, the record of Cambrian cephalopods is limited, and information on the early evolution and habitats of this molluscan class has grown slowly over the last century.

PlectronocerasUlrich and Foerste, 1933, from the Yenchou Member of the Fengshan Formation in Shantung Province and southern Manchuria, northeast China, was the first cephalopod described from the Upper Cambrian (Walcott, 1905; Kobayashi, 1935; see Mutvei et al., 2007)....

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