Geissleria cascadensis (Sovereign ex Sovereign) Stancheva Geissleria cascadensis (Sovereign ex Sovereign) Stancheva in Notul. Algarum 103: 1. 29 May 2019is new combination for Navicula cascadensis Sovereign ex Sovereign in Trans. Amer. Microscop. Soc. 79: 345. 1960