Augustoceras is a genus of nautiloid cephalopods included in the order Oncocerida and family Valcouroceratidae. It is known form the Middle and Upper Ordovician of Kentucky and Ohio in the US.

Augustoceras
Temporal range: Mid to Late Ordovician
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Oncocerida
Family: Valcouroceratidae
Genus: Augustoceras
Flower, 1944

Shells of Augustocers are slender, upwardly curved, fusiform, exogastric cyrtocones with subtriangular cross-sections, short chambers, oblique sutures, and subventral siphuncles with simple internal radial actinosiphonate deposits. Kindleoceras from the Upper Ordovician of Ontario differs in having a more triangular cross-section and more numerous actinosiphonate rays in its siphuncle.

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