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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crassa
digitus
var. lamellosum
digitus
var. latum
oblongum
interruptum
spec.
spec.
kinahanii
spec.
polymorphum
var. polymorphum
spec.
spirostriolatum
digitus
brebissonii
rotata
swartzii
capitulum
antilopaeum
neosinuosum
brebissonii
pachydermum
thomasiana
var. notata
ansatum
forficulatum
var. verrucosum
neodepressum
armatum
oblongum
porteanum
truncata
rhomboidale
furcatum
uncinatum
dissiliens
pseudonitidulum
var. validum
truncata
var. bahusiensis
bidentatum
hirsutum
cucurbitinum
minor
pyramidatum
truncata
var. quadrata
binale
var. gutwinskii
inconspicuum
borreri
americana
quadratulum
trabecula
var. elongatum
coeseli
margaritacaeum
bicuneatum
apiculata
simplicius
crenulatum
crassum
simonyi
var. sparsiaculeatum
caelatum
crux-melitensis
sparsepunctatum
ehrenbergii
didelta
spongiosum
var. perbifidum
connatum
denticulata
subarctoum
trabecula
var. trabecula
humerosum
teliferum
dejectus
spec.
conspersum
komarekii
papillifera
arboricola
venustum
var. excavatum
viridis
pulchellum
tripus
granulatus
var. granulatus
subspicatus
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var. affine
nostochinearum
convergens
arcuata
integrum
aureus
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lunatus
alternans
irregularis
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