Photo credit: Charles Krebs
Stephanopyxis palmeriana are centric diatoms, approximately 27-71µm in diameter, and oblong in shape. These little rounded rectangles form chains that are connected by faint black external tubes protruding out of a slit within the diatom wall. Many chloroplasts are visible dotting the inside of their cells.
Stephanopyxis palmeriana are found in temperate to warm water.
For more information see
A Taxonomic Guide to Some Common Marine Phytoplankton, by Rita Horner (Biopress Ltd. 2002)
SoundToxins, a diverse partnership of Washington state shellfish and finfish growers, environmental learning centers, Native American tribes, and Puget Sound volunteers, is a monitoring program designed to provide early warning of harmful algal bloom events in order to minimize both human health risks and economic losses to Puget Sound fisheries.