Guiry, M.D. & Guiry, G.M. (2025). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Amphidinium extensum Wulff, 1919. Accessed through: Glover, A.G.; Higgs, N.; Horton, T. (2025) World Register of Deep-Sea species (WoRDSS) at: https://marinespecies.org/deepsea/aphia.php?p=taxdetails&id=232577 on 2026-09-16
Glover, A.G.; Higgs, N.; Horton, T. (2026). World Register of Deep-Sea species (WoRDSS). Amphidinium extensum Wulff, 1919. Accessed at: https://marinespecies.org/Deepsea/aphia.php?p=taxdetails&id=232577 on 2026-09-16
context source (Deepsea)Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online athttp://www.iobis.org/[details]
basis of recordGómez, F. (2005). A list of free-living dinoflagellate species in the world's oceans. <em>Acta Bot. Croat.</em> 64(1): 129-212.[details]
basis of recordGuiry, M.D. & Guiry, G.M. (2026). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online athttp://www.algaebase.org[details]
additional sourceGuiry, M.D. & Guiry, G.M. (2026). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online athttp://www.algaebase.org[details]
Present Inaccurate Introduced: alien Containing type locality