Waterton. 1 Pinnularia brebissonii (4570) 2 Pinnularia borealis (4561) 3 Caloneis sp. [C. bacillum sensu lato PH] (4531) 4Pinnularia borealis var. scalaris (4561) 5 Pinnularia rabenhorstii (4561) 6 Caloneis schumanniana (4543, 4547) 7 Pinnularia crucifera (4543) 8 Pinnularia isostauron (4561) 9 Pinnularia lunata (4531) 10 Caloneis tenuis (4520) 11 Caloneis undulata [Caloneis sp. PH] (4520, 4540, 4543) 12 Pinnularia obscura (4568) 13 Pinnularia sudetica (4569) 14 Pinnularia microstauron (4537, 4543) 15 Pinnularia viridis [P. complexa var. minor PH] (4531) 16 Pinnularia biceps (4569, 4570) 17 Pinnularia anglica [P. biceps PH] (4534) 18 Pinnularia septentrionalis (4568) 19 Pinnularia turbulenta (4534) 20 Pinnularia pseudosuchlandtii (4569). Scale bar: 10 µm.