The pennate diatoms

2e edit A.S.Atl A.Schmidt Achnanthes Akad apical axis area very narrow areolae auxospore axial area Bacill broadly rounded Cell wall central area central nodule central pores Chamber ring Chromatophores Cleve Cocconeis Coll concave constricted convex delicate DeToni Diat diatoms differentiated Dipl Diploneis distinctly distributed and common dorsal Ehrenberg elliptical elongated Eunotia Fragilaria fresh water genus girdle view Grun Grunow Habitat Heurck Hust Hustedt hyaline I.e. fig Illustrations intercalary bands keel puncta Kutzing lanceolate less linear-elliptical linear-lanceolate longitudinal canals longitudinal ribs Mastogloia Micr middle line narrow linear Navicula Occurrence and Distribution Original Pantocsek Peragallo poroids protracted ends pseudoraphe Rabenhorst Raphe straight Raphe valve Rapheless valve rare robust rows septa side slightly radial spec species Stauroneis strongly structure Syll Synedra Synonyms transapical ribs Transapical striae transverse fascia urn long urn wide V.H.Syn valve margin valve width Valves linear W.Smith water form wavy weakly wedge-shaped widened