FIGURES 39–53 in Taxonomy, frustular morphology and systematics of Platichthys, a new genus of canal raphe bearing diatoms within the Entomoneidaceae

FIGURES 39–53. Platichthys krammeri sp. nov. 39–49. LM. Valve view, frustules in various position with different focus. Note in particular diffuse prolongation of fibulae into the valve transapically. 50–53. SEM. 50. External valve view. 51, 52. External view of valve end. Holotype specimen in straight and marginal view. Note copulae of epitheca and shallow valves lacking distinction between faces and mantles. 53. External valve view of specimen with slightly lacerated surface.