Ciliates – SAR-Alveolata (Ciliophora)

Observations on Stentor coeruleus

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Stentor coeruleus (Pallas, 1766) Ehrenberg, 1831

Most likely ID: n.a.

Basionym: Brachionus stentoreus var. coerulei Pallas, 1766

Add’l Synonyms: Stentor caerulescens Ehrenberg, 1831

According to Foissner, Ehrenberg published in 1838:
Stentor coeruleus (Pallas, 1766) Ehrenberg, 1830 – in: Ehrenberg, Infusionsthierchen, p. 263.
But the basionym was published in Abh. dt. Akad. Wiss. Berl., Jahr 1831: 99

Stentor coeruleus on Oedogonium.

Place name: Tropical freshwater aquarium
Latitude: 54.3018013 Longitude: 10.07120132

Microscope Zeiss Axioplan, camera Canon EOS 600D.

Sampling date 08/2006.

The bright, elliptical, pearl-like circles represent the macronucleus of Stentor coeruleus.

Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany)
Latitude: 54.304095 Longitude: 10.086073

Microscope Zeiss Universal, camera Olympus C7070WZ.

A time-lapse sequence with intervals of about 4 seconds shows the process of defecation. In the image on the top right you can see the opening cytoproct with the membrane of the defecation vacuole still intact. In the first image in the bottom row the defecation vacuole membrane has opened, the second image shows the release of the digestive waste. In the last two images we see stages of the cytoproct slowly closing.

Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany)
Latitude: 54.304095 Longitude: 10.086073

Microscope Zeiss Universal, camera Olympus C7070WZ.

Another sequence of defecation in Stentor coeruleus.

Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany)
Latitude: 54.304095 Longitude: 10.086073

Microscope Zeiss Universal, camera Olympus C7070WZ.

A series of optical cross-sections through the vestibule, buccal cavity and peristome of Stentor coeruleus.

Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany)
Latitude: 54.304095 Longitude: 10.086073

Microscope Zeiss Universal, camera Olympus C7070WZ.

Scale bars indicate 50 µm.

Five images.

Tomographic cross-sections through a Stentor coeruleus, lateral view.
AZR = adoral membranelle zone, MTR = microtubule ribbons, Ma = pearl-string macronucleus. The microtubule bands are completely expanded to give the cell body the maximum size. For the physiology of the microtubule bands, see Hausmann/Hülsmann/Radek Protistology 3rd ed, Stuttgart, 2003.

Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!

Place name: Tropical freshwater aquarium
Latitude: 54.3018013 Longitude: 10.07120132

Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.

Scale bars indicate 50 µm.

Nine images.

Tomographic cross-sections through a Stentor coeruleus, top view.
AZR = adoral membranelle zone, MTR = microtubule ribbons, Ma = pearl-string macronucleus, BC = buccal cavity. The microtubule bands are completely expanded to give the cell body the maximum size. For the physiology of the microtubule bands, see Hausmann/Hülsmann/Radek Protistology 3rd ed, Stuttgart, 2003.

Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!

Place name: Tropical freshwater aquarium
Latitude: 54.3018013 Longitude: 10.07120132

Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.

© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
For permission to use of (high resolution) images please contact postmaster@protisten.de.

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Observations on Stentor coeruleus

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