Nanno (genus)

Nanno Temporal range: M Ordovician
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Order:	†Endocerida
Family:	†Endoceratidae
Genus:	†Nanno

Nanno is an Endocerid, named by Clarke in 1894 for the apical end of an endocerid from the Trenton Limestone of New York state that has the basic description of the nanno type (where the siphuncle swells to fill the entire apex of the shell, leaving septa and camerae to begin a few centimeters forward). It is possibly the senior synonym for Proterovaginoceras . As a valid genus, Nanno is included in the Endoceratidae but the nanno type apex may be found in other families.

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