Cleve, P.T. (1900), The seasonal distribution of Atlantic plankton organisms. Göteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar Fjarde följden 3 (3): 215 [comb. nov.]

basionym: Ceratium fusus var. extensum Gourret legitimate

McMinn, A. & Scott, F.J. in Scott, F.J. & Marchant, H.J. (ed.) (2005), Dinoflagellates. Antarctic Marine Protists: - [secondary reference]

ABRS (2008), Australian Algal Name Index Edn. 2008: - [secondary reference]

• Comment: Scott & Marchant 2004 Ant. Mar. Protists p. 221 include this taxon in a complex with C. fusus.
• AMANI dist.: Southern Ocean, Cosmopolitan
• Habit: Planktonic

McCarthy, P. (Comp.) (2012), Census of Australian Marine Dinoflagellates: - [secondary reference]

nomenclatural synonym: Ceratium fusus var. extensum Gourret legitimate

McCarthy, P. (Comp.) (2012), Census of Australian Marine Dinoflagellates: - [taxonomic synonym]

taxonomic synonym of: Ceratium biceps Clap. & J.Lachm. legitimate

Algal Subcommittee (2021), CHAH Algal Subcommittee: - [taxonomic synonym]

taxonomic synonym of: Tripos biceps (Clap. & J.Lachm.) F.Gómez legitimate

Guiry, M.D. & Guiry, G M. (2021), -. Algaebase web site: www.algaebase.org: - [nomenclatural synonym]

nomenclatural synonym of: Tripos extensus (Gourret) F.Gómez legitimate

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