Haida Gwaii. 1 Achnanthidium kriegeri (5066) 2–4 Achnanthidium minutissimum (5063, 5066, 6890) 5–11 Rossithidium pusillum (5063, 5065, 5067) 12, 13 Planothidium delicatulum (6890) 14, 15 Psammothidium nivale (6890) 16, 17 Eucocconeis flexella (5065, 5066) 18 Cocconeis sp. (5062) 19, 20 Cocconeis placentula (5062) 21 Nupela tenuicephala (5064) 22 Unknown genus (5063) 23, 24 Luticola sp. (6889) 25, 26 Luticola mutica (6890) 27–29 Kobayasiella parasubtilissima (5064, 6888) 30 Cavinula pseudoscutiformis (5065) 31 Diploneis elliptica (5062, 5065) 32 Diploneis finnica (5065). Scale bar: 10 µm.