[1][2] This original hypothesis was made because the first two specimens recovered were smaller in overall size and displayed apparent aspinoceratid coiling, which is typical within several helicancyan taxa.

The exact placement of Antarcticoceras remained uncertain because the specimens displayed high dorso-lateral tubercule, single-sized ribbing, and fairly simple suture, none of which were Crioceratid features.

A later study found major similarities in the ventral morphology and ornamentation Shasticrioceras and Antarcticoceras which suggest a shared evolutionary origin.

[3] Following the placement of the genus into the Shasticrioceratidae, it appears most likely that Antarcticoceras evolved sometime during or before the Barremian from Shasticrioceras or a Shasticrioceras-like common ancestor.

[4][5] A third species A. perezi is generally regarded as a nomen nudum (the description is not considered complete enough to justify a valid taxonomic name).