''Kiaeroceras'' is a slender, nearly stright shelled, cyrogomphoceratid ( Nautiloidea-

Discosorida Discosorida are an order of cephalopods that lived from the beginning of the Middle Ordovician, through the Silurian, and into the Devonian. Discosorids are unique in the structure and formation of the siphuncle, the tube that runs through and c ...

) from the Upper Ordovician of northern Europe (e.g. Norway). The cross section of the shell is compressed, height greater than width. The body chamber is slightly contracted so as to narrow toward the aperture, which in some is slightly flared. The venter, narrowly rounded. The siphuncle is close to the venter, septal necks short, connecting rings thick, bullettes prominent. ''Kiaeroceras'' is thought to be derived from ''

Strandoceras ''Strandoceras'' is a strongly curved cyrtogomphoceratid with a laterally compressed cross section from the middle and upper Ordovician of Northern Europe; Estonia, Norway, the U.K. The body chamber of ''Stradoceras'' is straighter and more sle ...

'' although derivation is possibly from '' Cyrtogomphoceras'', which is intermediary in form.

References

*Flower, Rousseau H. and Curt Teichert, 1957; The Cephalopod Order Discosorida, in University of Kansas Paleontological Contributions, Mollusca Article 6, pp 1–144 (plates, figs) July 1, 1957. *Curt Teichert 1964. Nautiloidea-Discosorida; Treatise on Invertebrate Paleontology Part K, Endoceratoidea, Actinoceratoidea, Nautiloidea. Geological Society of America. {{Taxonbar, from=Q16983929 Discosorida Prehistoric nautiloid genera