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

Observations on Difflugia bacillifera

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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 bacillifera Penard, 1890

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: Difflugia pyriformis var. bacillifera Levander, 1895
Difflugia septentrionalis var. bacillifera Awerintzew, 1900

Sampling date 09/2025. Scale bars indicate 50 µm.

Three images, whole test and two optical cross-sections.
The cross-sections show the narrow, cylindrical neck that is typical for the species.

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 Kleiner Moarkopf near Lachtal (Styria, Austria)
Latitude: 47.24297 Longitude: 14.40055 Elevation: 1615 m

Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.

Sampling date 06/2025. Scale bars indicate 50 µm.

Three images, whole test and two optical cross-sections.

In this test, too, the characteristic tubular shape of the neck is masked by the attached diatom frustules and is only visible in the last cross-section.

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

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.

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 bacillifera

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