Valhalloceras is a genus of nautiloid cephalopod found only in upper Lower Ordovician, Arenigian, carbonates on Svalbard Island and Jan Mayen Island. The type and only species so far named is Valhalloceras floweri Evans and King 1990. Valhalloceras is assigned to the Oncocerida, it and the related genus Phthanoncoceras are united in the family Phthanoncoceratidae.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0