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

Observations on Arcella intermedia

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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 Arcellidae Ehrenberg, 1843
●●●●●●● Genus Arcella Ehrenberg, 1832

Arcella intermedia (Deflandre, 1928) Tsyganov & Mazei, 2006

Most likely ID: n.a.

Basionym: Arcella hemisphaerica var. intermedia f. undulata Deflandre, 1928

Add’l Synonyms: n.a.

Sampling date 09/2011. Scale bars indicate 25 µm (1,2), 50 µm (3).

Members of the genus Arcella construct a proteinaceous test (shell) with numerous tiny alveoli reinforcing the test.

Three images.

First and second:	Lateral view, focus on cytoplasma.
Third:	Top view, synoptic representations of the test.

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: Bog Hegne Moor near Lake Constance (Germany)
Latitude: 47.718106 Longitude: 9.093974

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

Scale bar indicates 50 µm.

Place name: Pond situated in the vicinity of Lake Constance (Germany)
Latitude: 47.734945 Longitude: 9.091097

Microscope Zeiss Universal, camera Olympus C7070WZ.

Sampling date 04/2007. Scale bar indicates 25 µm.

The image shows a test from dorsal and ventral. On the ventral side, the aperture, two contractile vacuoles and two vesicular nuclei with centric nucleolus each are visible.

Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany)
Latitude: 54.304095 Longitude: 10.086073

Microscope Zeiss Universal, camera Olympus C7070WZ. 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 Arcella intermedia

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