Guiry, M.D. & Guiry, G.M. (2021). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Protoperidinium parallelum Paulsen, 1907. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=731165 on 2021-06-17
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