original descriptionHyatt, A. (1884). Genera of fossil cephalopods. <em>Proceedings of the Boston Society of Natural History.</em> 22: 253–338., available online athttps://www.biodiversitylibrary.org/page/42025344 page(s): 268 [details]
basis of recordKröger, B.; Pohle, A. (2021). Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen – a pelagic fauna with Laurentian affinities. <em>European Journal of Taxonomy.</em> 783(1): 1-102., available online athttps://doi.org/10.5852/ejt.2021.783.1601[details]