portrait

Description:

Euglena sanguinea - a brightfield portrait of this slow swimming species pigmented with hematochrome granules. Granules aggregate as seen here in low light conditions and disperse with increases in either water temperature or light intensity. Flagellum typically body length but not seen here. Small spindle shaped chloroplasts often spirally aligned with pellicular striations. Also referred to as E. rubra. Collected from freshwater pond near Boise, Idaho.