Amphidinium sphenoides syn Gymnodinium filum, Spirodinium glaucum, Katodinium glaucum, Massartia glauca 

This cell is 13.5um base width, 50um long, total volume 2385.65.  Temp. range 12.8 to 29.35, salinity range 8.4 to 16.5. This species can be confused with Gyrodinium spirale when fixed. Collected July to Oct. Chesapeake Bay and all Rhode River stations.

Dinoflagellates