[1] Antarcticeras is represented by two fossil shell fragments from the Early Eocene La Meseta Formation from Seymour Island, Antarctica.

The shells are weakly mineralized with the presence of soft tissues and were likely only preserved due to a unique depositional environment.

The coleoids are thought to have originated within the Bactritida during the Late Paleozoic and share similar anatomical features with one another, but Antarcticeras was found to differ from both groups, with its siphuncle placement more closely resembling that of the Actinocerida and especially the Orthocerida, which were recovered as its potential ancestors.

[3] In 2018, Fuchs et al published a study refuting the previous classification of Antarcticeras as a new subclass of cephalopods.

In addition, a Late Devonian orthocone from Timan Ridge in Russia was found to closely resemble Antarcticeras in siphuncle placement, and was thus cited as a potential Paleozoic representative of the Paracoleoidea.