with flagella

Description:

Heterosigma (het-err-o-sig-ma) a raphidophyte. stramenopile. There are typically two flagella inserting subapically, one projecting forwards in swimming cells, the other trailing. With many discoidal plastids, with chlorophylls a and c. This genus has been confused with Olisthodiscus. Marine raphidophytes have been associated with red tides and linked to toxicity. Differential interference contrast.