Testate Amoebae –
Amoebozoa (Part), Stramenopiles (Part), Rhizaria (Part)

Observations on Netzelia tuberculata

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Taxonomic tree according to Lahr et al., 2019 (https://doi.org/10.1016/j.cub.2019.01.078)
and González-Miguéns et al., 2022 (https://doi.org/10.1016/j.ympev.2022.107557)

Amorphea Adl et al., 2012
Amoebozoa Lühe, 1913, renewed definition Cavalier-Smith, 1998
● Tubulinea Smirnov et al., 2005
●● Elardia, Kang et al., 2017
●●● Order Arcellinida Kent, 1880
●●●● Suborder Glutinoconcha Lahr et al., 2019
●●●●● Infraorder Sphaerothecina Kosakyan, Lara and Lahr, 2016
●●●●●● Family Netzeliidae Kosakyan et al., 2016, emend. Gonzales-Miguens et al, 2021
●●●●●●● Genus Netzelia Ogden, 1979

Netzelia tuberculata (Wallich, 1864) Netzel, 1983

Most likely ID: n.a.

Basionym: Difflugia tuberculata Wallich, 1864

Add’l Synonyms: n.a.

Sampling date 10/2007. Scale bars indicate 50 µm (1, 3, 4), 100 µm (2).

The surface texture of the test and the outline of the pseudostome collar of Netzelia tuberculata are (according to R. Meisterfeld, RWTH Aachen, Germany) very variable. Most of the agglutinated particles of the test (Shell) are silicious idiosoms, and all xenosomes are coated with silica by the mother organism.

Four 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: Pond Suploch, Hiddensee (Germany)
Latitude: 54.538638 Longitude: 13.097802

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

Sampling date 10/2008. Scale bars indicate 25 µm (1), 10 µm (2).

Two images: whole test and detailed view.

The test of Netzelia tuberculata shows its raspberry-like structure which gave the name (tuberculata). Like all Lesquereusiidae, Netzelia builds its shell from self-produced silica particles (called idiosomes). A few xenosomes are also visible. All xenosomes are covered with a siliceous coating.

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: Pond Suploch, Hiddensee (Germany)
Latitude: 54.538638 Longitude: 13.097802

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

SEM of Netzelia tuberculata test. Courtesy of Lab Dr. Karl-Heinz Schäffner, Solingen, Germany.

Place name: Pond Suploch, Hiddensee (Germany)
Latitude: 54.538638 Longitude: 13.097802

Sampling date 06/2025. Scale bar indicates 50 µm.

Place name: Moor called Schwemm near Walchsee (Tyrol, Austria)
Latitude: 47.657707 Longitude: 12.299540 Elevation: 669 m

Tescan Clara SEM, Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl

© 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 Netzelia tuberculata

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