The Reudemannoceratidae produced generally medium-sized endogastric and almost straight shells with the siphuncle slightly ventral from the center.

Sutures are closely spaced and slope forward from venter to dorsum with the obliquity increasing as growth progressed.

Reudemannoceras gave rise to the Cyrtogomphoceratidae through Ulrichoceras[2] as a result of an evolutionary ventral shift of the siphuncle and the development of large, inflated bullettes.

Endogastric Reudemannoceras and Franklinoceras are likely to have carried their shells high and to the back, aperture facing downward, as they probed the sea bed for prey.

The more advanced and slightly later Madiganella may have been a fair swimmer, as indicated by the hyponomic sinus, and may have been an active stalker with a horizontal orientation.