Calcidiscaceae Coccolithaceae Hymenomonadaceae Pleurochrysidaceae Reticulosphaeraceae Coccolithales is an order of Haptophyceae.

[1] The Coccolithales has long been considered one of only two orders in the Coccolithophyceae, the other order being the Isochrysidales.

[2][3]

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