''Balticoceras'' is a genus in the Orthocerid family,

Orthoceratidae Orthoceratidae, from Ancient Greek ὀρθός (''orthós''), meaning "straight", and κέρας (''kéras''), meaning "horn", is an extinct family of actively mobile carnivorous cephalopods, subclass Nautiloidea, that lived in what would be Nort ...

, from the Upper Ordovician of Estonia, closely related to ''

Michelinoceras ''Michelinoceras'' is the oldest known genus of the Michelinocerida, more commonly known as the Orthocerida, characterized by long, slender, nearly cylindrical orthocones with a circular cross section, long camerae, very long body chambers, and a ...

''. ''Balticoceras'' is distinguished by its straight shells with a subcircular cross section, broadly flattened ventrally and evenly rounded dorsally, and by its marginal, orthochoanitic siphuncle. ''Balticoceras'' which is included in the subfamily Michelinoceratinae along with ''Michelinoceras'' should not be confused with '' Baltoceras'' which belongs in the

Ellesmerocerida The Ellesmerocerida is an extinct order of primitive cephalopods belonging to the subclass Nautiloidea with a widespread distribution that lived during the Late Cambrian and Ordovician. Morphology The Ellesmerocerida are characterized by shell ...

''References''

* Walter C. Sweet 1964. Nautiloidea- Orthocerida.

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...

, Part K. Teichert and Moore (eds) {{Taxonbar, from=Q4852745 Orthocerida Fossil taxa described in 1940