Aulacoseirales is an order of diatoms belonging to the class Bacillariophyceae. The order consists only one family: Aulacoseiraceae.
Genera Genera: Alveolophora A.I.Moisseeva & T.L.Nevretdinova, 1990 Aulacoseira G.H.K.Thwaites, 1848 †Eoseira A.P.Wolfe & M.B.Edlund, 2005 Pseudoaulacosira G.Lupikina & G.K.Khursevich, 1991 Strangulonema R.K.Greville, 1865
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