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Photo of Asterionellopsis glacialis by Dr. Vera Trainer and Brian Bill, NOAAPhoto of Asterionellopsis glacialis by Dr. Vera Trainer and Brian Bill, NOAA

Photo credit: Dr. Vera Trainer and Brian Bill, NOAA

Phytoplankton of the month — November 2014

Asterionellopsis glacialis

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)

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