Microworld

world of amoeboid organisms

Leptomyxa arborea
L. arborea, Gooimeer, 2023

Leptomyxa arborea  Berney, Geisen et Burberg, 2016

Diagnosis: Flattened, expanded highly branched and reticulate cells. During locomotion amoeba with long tubular body with some lobopodia at both ends extending in several directions and also with subpseudopodia. Multinucleate, nuclei of vesicular type, numerous, small, spherical. Specimen are not sensitive to light.

Dimensions: Length 50-4600 µm. Nuclei 2.5-3.0 µm

Ecology: Soil and freshwater. Type location: Grass roots from a meadow outside the Biocenter at the University of Cologne, Germany. Over the years I have found several specimens between basalt blocks in the Gooimeer, a large lake in the Netherlands. They were up to 4.6 mm large.

Remarks: Resembles  L. reticulata in size and general appearance, but usually is more ramose and expanded than the lattr species. In locomotion it is usually more “tree-like” than L. recticulata, strongly branching in anterior part with usually one single posterior end. However these two species are very similar; the only ultimate differentiating character is the SSU sequence.

Leptomyxa arborea
L. arborea, 2023; nuclei, in fluorescence, stained with Acridine orange
Leptomyxa arborea
L. arborea, 2023; nuclei
Leptomyxa arborea
L. arborea, 2023, tree-like shape
Leptomyxa arborea
L. arborea, 2023
Leptomyxa arborea
L. arborea, 2023
Leptomyxa arborea
L. arborea, 2023
Leptomyxa arborea
L. arborea, 2023
Leptomyxa arborea
L. arborea, 2023
Leptomyxa arborea
L. arborea, 2023
Leptomyxa Leptomyxa arborea
L. arborea, 2022
Leptomyxa
L. arborea, 2021
Leptomyxa
L. arborea, 2021, leaving an empty cover behind
Leptomyxa
L. arborea,2021
Leptomyxa
L. arborea,2021
Leptomyxa
L. arborea,2021
Leptomyxa
L. arborea,2021
Leptomyxa
L. arborea, 2021, nuclei, stained with acridine orange
Leptomyxa
L. arborea,2021, nuclei (in a crushed specimen)
Leptomyxa
L. arborea,2021, typical subpseudopodia
Leptomyxa
L. arborea,2021
Leptomyxa
L. arborea,2021. The cell is covered with a layer of small xenosomes collected from the environment.
Ferry Siemensma, created March 2, 2019; last modified January 29, 2023
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