Related how?

Biota (Life)
Eukaryote (Eukarya)
Diaphoretickes (Plants+hc+sar megagroup)
Haptista
Haptophyta (Haptophytes)

Coccolithophyceae (18940793)

Children (2 direct children, 243 direct and indirect children):

Coccolithales (tree size 130)

Prymnesiophycidae (tree size 111)