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

Observations on Difflugia globulosa

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

Difflugia globulosa (Dujardin, 1837) Penard, 1902

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: Difflugia proteiformis Lamark, 1816
Difflugia globulosa Dujardin, 1837 (in part)
Difflugia acropodia Hertwig et Lesser, 1874

Remark: Penard (1902) redescribed this species and suggested that Dujardin’s original description of D. globulosa was ambiguous. Dujardin described this species as spherical or ovoid and 100—250 µm large. Probably he observed at least two different species.

Sampling date 06/2025. Scale bars indicate 100 µm (1), 50 µm (2).

Two images.

Note: In addition to other xenosomes, several round, brown particles can be seen in the shell. These are fruiting bodies (uredospores) of rust fungi; they were very numerous in the local water.

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

(1) Stereo microscope Olympus SZX16, camera Olympus OM-D M5 MKII. DOF image.

(2) Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.

Uredospores from the water sample used above

Sampling date 06/2025. Scale bars indicate 25 µm.

Four images. Top view and optical cross-sections through uredospores (fruiting bodies of rust fungi).

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

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 Difflugia globulosa

Uredospores from the water sample used above

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