portrait

Description:

Urceolus, a colorless phagotrophic euglenid flagellate. The cell is flask-shaped and flexible with visible pellicular striations (obscured in some species by adhering particles). There is a flared collar anteriorly surrounding the cytostome. There is a long thick emergent flagellum, which is most active at the tip as seen in Peranema. An ingestion apparatus composed of two rods is present although not visible in these images. The posteriorly located nucleus is visible. From freshwater pond near Boise, Idaho. Oblique illumination.