Cocconeis placentula var. australica
Cocconeis placentula subsp. baicalensis
Cocconeis placentula var. euglypta
Cocconeis placentula var. intermedia
Cocconeis placentula var. klinoraphis
Cocconeis placentula var. lineata
Cocconeis placentula f. major
Cocconeis placentula var. fossilis
Cocconeis placentula var. rodriguensis
Cocconeis placentula var. acuta
Cocconeis placentula var. placentula
Cocconeis placentula var. rouxii
Cocconeis placentula var. tenuistriata