†order Stephanolithiales Bown and Young 1997 (haptophyte alga)
Full reference: P. R. Bown and J. R. Young. 1997. Mesozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19:21-36
Parent taxon: Prymnesiophyceae according to P. R. Bown and J. R. Young 1997
Sister taxa: Arkhangelskiales, Calyptrosphaeraceae, Eiffellithales, Goniolithaceae, Lapideacassaceae, Podorhabdales, Prymnesiophycidae, Syracosphaerales, Watznaueriales
Subtaxa: Parhabdolithaceae, Stephanolithiaceae
Ecology: passively mobile planktonic "photoautotroph"