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

Observations on Difflugia venusta

Protisten / Protisten.de – created by Wolfgang Bettighofer / Testata Amoeboid Organisms / Amoebozoa / Tubulinea / Elardia / Arcellinida / Glutinoconcha / Longithecina / Difflugiidae / Difflugia venusta

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 Longithecina Lahr et al., 2019
●●●●●● Family Difflugiidae Wallich, 1864
●●●●●●● Genus Difflugia Leclerc, 1815

Difflugia venusta (Penard, 1902) Ogden, 1983

Most likely ID: n.a.

Basionym: Difflugia pyriformis var. venusta Penard, 1902

Add’l Synonyms: n.a.

Sampling date 10/2008. Scale bars indicate 50 µm (1, 3), 100 µm (2).

Three images.

First and second:	Synoptic representation of the test (shell).
Third:	Synopsis of apertural (right) and abapertural views and shows the circular aperture (pseudostom) and the elliptical cross-section of the test´s bulb. A defecation vacuole is visible in the aperture center.

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 10/2007. Scale bar indicates 50 µm.

The xenosoms in the test, which originate from pennate diatoms, are clearly visible.

Specimen of a diminutive population.

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

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF image.

Sampling date 04/2021. Scale bar indicates 50 µm.

The cell is preparing for binary fission. Tiny sand grains are already being collected on the pseudostome for the test (shell) of the daughter cell (bottom left corner).

Place name: Pond near Großostheim (Germany)
Latitude: 49.88482168 Longitude: 9.09980822

Microscope Zeiss Axioplan, 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.

Protisten.de

Observations on Difflugia venusta

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