Photo credit: Dr. Vera Trainer and Brian Bill, NOAA
Asterionellopsis glacialis are pennate diatoms that are joined by the valve faces of elongated foot poles to create a spiraled, star-shaped chain (30-150um long). The foot pole narrows to form an elongated extension (neck). The foot pole is triangular in girdle view and rounded in valve view. One to two chloroplasts are present only in the foot pole.
Asterionellopsis glacialis's distribution is cosmopolitan, and is sometimes abundant in cold to temperate waters. They are frequently members of the surf zone diatom community.
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.