Amphora francescae Giffen, 1970 (original description)
Amphora tenellula Giffen, 1970 (original description)
Auricula machutchoniae Giffen, 1970 (original description)
Diploneis interrupta var. caffra Giffen, 1970 (original description)
Gyrosigma diversitatum Giffen, 1970 (original description)
Gyrosigma eximium (Thwaites) Boyer, 1927 accepted as
Schizonema eximium Thwaites, 1848 (new combination reference)
Licmophora pfannkucheae Giffen, 1970 (original description)
Navicula ponticula Giffen, 1970 (original description)
Navicula pseudoincerta Giffen, 1970 (original description)
Navicula subirritans Giffen, 1970 (original description)
Nitzschia bathurstensis M.H.Giffen, 1970 (original description)
Nitzschia kowiensis Giffen, 1970 (original description)
Pleurosigma kowiense Giffen, 1970 (original description)
Stauroneis bathurstensis Giffen, 1970 (original description)