Synonymised with Chaetoceros willei according to B. Hartley. [details]
Considerd as a variety Achnanthes laceolata var elliptica [details]
Considered as a variety instead of subspecies: Amphora laevis var leavissima (Gregory) Cleve, 1896 [details]
Referred to as Chaetoceros borealis densus by B. Hartly. [details]
This is a new name for Amphora graeffi (Grunow) Cleve 1896, non A. graeffi Grunow ex Schmidt, 1875 [details]
It concerns the following synonymised species: Chaetoceros gracilis sensu Apstein, 1909, non Schütt, 1895, nec ... [details]
Also mentioned as syn. Of N. marnieri Manguin, 1957. [details]
Syn. Of N. retusa cancellata according to Hartley (1986). [details]