Ciliates – SAR-Alveolata (Ciliophora)

Observations on Zoothamnium arbuscula

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Zoothamnium arbuscula (Ehrenberg, 1831) Ehrenberg, 1838

Most likely ID: n.a.

Basionym:

Add’l Synonyms: Zoothamnium geniculatum Ayrton, 1902

Sampling date 05/2022. Scale bars indicate 0.5 mm (2).

Two images.

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: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738

Stereo microscope Olympus SZX16/Planapo 1.0x, camera Olympus OM-D M5 MKII.

Scale bars indicate 100 µm.

Specimen grown in a Petri dish on the edge of a microscope slide.

An image couple, the first without and the second with marking arrows.

The images show a initial cell for a Zoothamnium tree. In this ciliate species, only special cells, the macrozooids, can separate themselves from the mother tree as swarmers and form new trees.
Macronucleus (arrow), contractile vacuole (arrowhead), contractile stalk (double arrowhead).

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: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738

Stereo microscope Olympus SZX16/Planapo 2.0x, camera Olympus OM-D M5 MKII. DOF images.

Scale bars indicate 250 µm.

Three pairs of images, each without and with marking arrows.

Series of binary fission:

First couple:	Phase 1: Swollen cell, ready for binary fission (upper left) shortly before. Macro nucleus, contractile vacuole, contractile stalk.
Second couple:	Phase 2: Cell during binary fission. Contractile vacuole (arrowheads) has been already duplicated, the duplicated macro nucleus (arrow) is yet connected.
Third couple:	Phase 3: Shortly after finishing binary fission. Macro nucleus (arrow), contractile vacuole (arrowhead), contractile stalk with central muscle cord (double arrowhead).

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: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738

Stereo microscope Olympus SZX16/Planapo 2.0x, camera Olympus OM-D M5 MKII. DOF images.

Scale bar indicates 100 µm.

Stalk base with holdfast.

Place name: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738

Stereo microscope Olympus SZX16/Planapo 2.0x, camera Olympus OM-D M5 MKII. DOF image.

© 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 Zoothamnium arbuscula

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