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

Observations on Lesquereusia spiralis

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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 Lesquereusiidae Jung, 1942
●●●●●●● Genus Lesquereusia Schlumberger, 1845

Lesquereusia spiralis (Ehrenberg, 1840) Tanárek, 1881

Most likely ID: n.a.

Basionym: Difflugia spiralis Ehrenberg, 1840

Add’l Synonyms: Lesquereusia jurassica Schlumberger, 1845

Sampling date 10/2008. Scale bars indicate 50 µm (1), 10 µm (2), 25 µm (3), 10 µm (4), 5 µm (5) .

Five images.

First:	Synoptic representation of the test (shell). It primarily consists of idiosomes (self made siliceous particles looking like sausages). A few xenosomes (incorporated grains of sand) are visible. All xenosomes are covered with a siliceous coating.
Second and third:	A closer look on the idiosomes. We see many sieve-like regions which are identical to the proteinaceous matrix of the test, in which idiosomes an xenosome (quartz grains) are embedded.
Fouth:	Region of the test´s neck with a large quartz grain, which is covered with silica produced by the amoeba.
Fifth:	A look inside the test shows that idiosomes are produced in reserve and stored in the cytoplasm in order to be used during cell division to build the test of the daughter cell.

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.

Two images, taken with a dissecting microscope.

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 Waasenmoos, Pass Thurn near Mittersill (Tyrol, Austria)
Latitude: 47.30234117 Longitude: 12.41751194

Microscope Olympus SZX16, camera Olympus OM-D M5 MKII. DOF images.

Place name: Wetland near Schladming (Austria)
Latitude: 47.37386 Longitude: 13.823016

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 Lesquereusia spiralis

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