Amphiprora paludosa var. recta Tynni, 1978 (original description)
Amphiprora surirelloides var. minor Tynni, 1978 (original description)
Amphora acutiuscula f. branderi Tynni, 1978 (original description)
Amphora ovalis var. baltica (Brander) Tynni, 1978 accepted as
Amphora baltica Brander, 1933 (new combination reference)
Cymbella incerta f. robusta Tynni, 1978 (original description)
Cymbella peraffinis Tynni, 1978 (original description)
Cymbella pseudocuspidata Tynni, 1978 (original description)
Cymbella ventricosa f. latens (Krasske) Tynni, 1978 accepted as
Cymbella latens Krasske, 1937 (new combination reference)
Gomphonema longiceps var. capitata Tynni, 1978 (original description)