, Dactyliosolen A.F. Castracane 1886 , Decussata 1 , Delicata , Delphineis G.W. Andrews 1977 , Denticula 1 , Denticula F.T. Kützing 1844 , Denticulopsis R. Simonsen 1979 , Desmogonium C.G. Ehrenberg in R. Schomburgk, 1848 , Detonula F. Schutt 1893 , Diadema K.D. Kemp & T.B.B. Paddock 1989 , Diademoides K-.D.Kemp & T.B.B.Paddock,1990 , Diadesmidaceae Mann 1990 , Diadesmis 2 , Diadesmis F.T. Kützing 1844 , Diatoma 4 , Diatoma J.B.M. Bory de Saint-Vincent 1824 , Diatomella 1 , Diatomella R.K. Greville 1855 , Dickieia Berkeley ex Kützing.1844 , Dictyoneidaceae Mann 1990 , Dictyoneidales Mann 1990 , Dictyoneis P.T. Cleve 1890 , Didymosphenia 1 , Didymosphenia M. Schmidt in A. Schmidt et al. 1899 , Dimerogramma J. Ralfs in A. Pritchard 1861 , Dimerogrammopsis M. Ricard 1987 , Dimidiata M. Hajos 1974 , Diplomenora K. Blaze 1984 , Diploneidaceae Mann 1990 , Diploneidineae Mann 1990 , Diploneis 1 , Diploneis (C. G. Ehrenberg) P.T. Cleve 1894 , Diprora 1 , Discostella , Distrionella 1 , Distrionella D.M. Williams, 1990 , Ditylum J.W. Bailey ex L.W. Bailey 1861 , Donkinia J. Ralfs in A. Pritchard 1861