Heterocapsa triquerta syn. Peridinium triquetra, Protoperidinium triquetrum, Glenodinium triquetrum 

Size 16um wide, 24um long, total volume 3216.97. Temp. range 0.54 to 28.0, salinity range  0.5 to 18.25. Collected Jan. to April and Oct. to Dec. from all Rhode River stations and

Dinoflagellates