A comprehensive classification of extant haptophytes is presented, with full citations of all taxa from species to class level within the division Haptophyta. Almost 100 notes discuss aspects of classification and nomenclature, with particular attention being paid to problems related to recognition of life-cycle associations. One new genus Holococcolithophora is described and six species are recombined in it. Appendices list conserved and rejected names, the type species of genera, and basionyms of recombined species.