Polonoceras is a genus included in the goniatitid subfamily Aulatornoceratinae named by Dybczynski, 1913.

According to Miller, et al. in the American Treatise on Invertebrate Paleontology, 1957, Polonoceras is a subgenus of Tornoceras.

Polonoceras, which lived during the Late Devonian, has an involute or moderately evolute, discoidal shell with a high aperture and flattened, grooved venter.

The adventitious lobe, next to the ventral lobe, is widely rounded, the Ventro-lateral saddle narrow and sometimes higher than lateral saddle.

It is also reported from Upper Devonian (middle Famennian) in Canning Basin, Western Australia.