Thalassiosira polychorda syn Thalassiosira anguste-lineata, 
Coscinodiscus anguste-lineata, Coscinosira polychorda 

The fine, multiple cytoplasmic threads, which are a distinctive trademark of Coscinosira, are just visible between these two cells. Collected in plankton tow (20u net) in mid-Chesapeake Bay area in September. Size 50u diameter. Salinity 16ppt, temperature 17C.

Diatoms