Waterton. 1 Sellaphora pupula (4570) 2 Sellaphora laevissima (4568) 3–6 Sellaphora parapupula (4520, 4531, 4542) 7 Craticula sardiniana (4543) 8 Craticula johnstoniae (4561) 9 Aneumastus rostratus (4547) 10 Aneumastus tusculus (4540) 11 Frustulia amosseana (4543) 12 Frustulia saxonica (4569). Scale bars: 10 µm.