Ruthenoceras
Encyclopedia
Ruthenoceras is a conical Cambrian
fossil originally classified as a cephalopod
, but which is too poorly preserved for a classification to be upheld.
Cambrian
The Cambrian is the first geological period of the Paleozoic Era, lasting from Mya ; it is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's...
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.