An arrangement of three Pleurosigma balticum from Pensacola Bay, Florida, USA. Recent marine material. Mounted in Naphrax and dated September 1969. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 22 images stacked in Zerene (Pmax).
Pleurosigma balticum (Ehrenberg) W.Smith 1852. Published in: Smith, W. (1852). Notes on the Diatomaceae with descriptions of British species included in the genus Pleurosigma. Annals and Magazine of Natural History, Series 2 9: 1-12, 2 pls. Page 8, Plate 2, Figure 1. This name is currently regarded as a synonym of Gyrosigma balticum (Ehrenberg) Rabenhorst.