Pflanzenreich Haeckel (1866) - plants Division Euthallophyta Subdivision Euphyceae Class Chlorophyceae Wille (1884) - chlorophytes Series Siphoneae 1 Family Botrydiaceae 2 Family Phyllosiphonaceae 3 Family Bryopsidaceae Bory 4 Family Derbesiaceae Hauck 5 Family Vaucheriaceae Dumort. (1822) 6 Family Caulerpaceae Kütz. 7 Family Codiaceae Kütz. (1843) 8 Family Valoniaceae Kützing 9 Family Dasycladaceae Kützing (1843)