Morphology, ecology and biogeography of Stauroneis pachycephala P.T. Cleve (Bacillariophyta) and its transfer to the genus Envekadea - Atazadeh, Islam; Edlund, Mark; van de Vijver, Bart; Mills, Keely; Spaulding, Sarah; Gell, Peter; Crawford, Simon; Barton, Andrew F.; Lee, Sylvia; Smith, Kathryn E. L.; Newall, Peter; Potapova, Marina (Diatom Research, 2014)