Cerataulina compacta Ostenfeld, 1901 (original description)
Chaetoceros longicrure (Cleve) Ostenfeld, 1901 accepted as
Chaetoceros didymus var. longicruris Cleve, 1897 (new combination reference)
Chaetoceros robustum (Cleve) Ostenfeld in Ostenfeld & Schmidt, 1901 accepted as
Chaetoceros peruvianum var. robustum Cleve, 1873 (new combination reference)
Chaetoceros schmidtii C.E.H.Ostenfeld (original description)
Lauderiopsis C.H. Ostenfeld & J. Schmidt, 1902 (original description)
Lauderiopsis costata Ostenfeld & Schmidt, 1901 (original description)
Rhizosolenia alata var. indica (H. Peragallo) Ostenfeld in Ostenfeld & Schmidt, 1901 accepted as
Rhizosolenia indica H.Peragallo, 1892 (new combination reference)
Rhizosolenia hyalina Ostenfeld, 1901 (original description)
Thalassiothrix longissima f. gracilis Ostenfeld in Ostenfeld & Schmidt, 1901 (original description)