Achnanthes promunturii Giffen, 1970 (original description)
Amphora profusa M.H.Giffen, 1971 (original description)
Berkeleya capensis Giffen, 1970 (original description)
Berkeleya lindheimeri (Grunow) Giffen, 1970 accepted as
Amphipleura lindheimeri var. lindheimeri Grunow, 1862 (new combination reference)
Berkeleya pellucida (Kützing) Giffen, 1970 accepted as
Frustulia pellucida Kützing, 1833 (new combination reference)
Cuneolus M.H. Giffen, 1970 (original description)
Cuneolus minutus Giffen, 1970 (original description)
Dimeregramma inane Giffen, 1970 (original description)
Gomphonema pseudoseptatum Giffen, 1970 (original description)
Grammatophora carteri Giffen, 1970 (original description)
Licmophora opephoroides Giffen, 1970 (original description)
Navicula biflexa (A.Schmidt) Giffen, 1970 accepted as
Cocconeis biflexa A.Schmidt, 1874 (new combination reference)
Navicula speibonae Giffen, 1970 (original description)
Rhabdonema scabellum Giffen, 1970 (original description)
Rhoicosphenia flexa M.Schmidt cf Giffen acc.J.R.Carter et al. (original description)
Surirella scopuli Giffen, 1970 (original description)
Trachyneis speibonae Giffen, 1970 (original description)