Chaetoceros anglicum (Grunow in Van Heurck) Ostenfeld, 1902 accepted as
Chaetoceros anglicus Grunow in Van Heurck, 1882 (new combination reference)
Chaetoceros clavigera Ostenfeld, 1902 (original description)
Chaetoceros peruvianum f. robusta (Cleve) Ostenfeld, 1903 accepted as
Chaetoceros peruvianum var. robustum Cleve, 1873 (new combination reference)
Chaetoceros peruvianum f. volans (Schutt) Ostenfeld, 1902 (new combination reference)
Chaetoceros siamense Ostenfeld, 1902 (original description)
Eucampia biconcava (Cleve) Ostenfeld, 1902 accepted as
Climacodium biconcavum Cleve, 1897 (new combination reference)
Rhizosolenia amputata Ostenfeld, 1902 (original description)
Rhizosolenia calcaravis var. cochlea (Brun) Ostenfeld, 1902 accepted as
Rhizosolenia cochlea Brun, 1891 (new combination reference)
Rhizosolenia clevei Ostenfeld, 1902 (original description)
Schmidtiella C.H. Ostenfeld, 1903 (original description)
Schmidtiella pelagica Ostenfeld, 1902 (original description)