A classification of known marine phytoplanktonic organisms is presente
d. The list is arranged according to class, family and genus, and repr
esents and updated review of extant genera included in the Atlas du Ph
ytoplancton Marin. Nomenclature follows the International Code of Bota
nical Nomenclature and the full authority citations are given at each
taxonomic level. Intended for taxonomists, teachers and researchers, e
xplanatory notes and references to previously published taxonomic stud
ies are provided where necessary.