Shantungendoceras
Encyclopedia
Shantungendoceras is a conical Tremadocian fossil originally classified as a cephalopod
Cephalopod
A cephalopod is any member of the molluscan class Cephalopoda . These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles modified from the primitive molluscan foot...

, but which is too poorly preserved for a classification to be upheld.
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