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The vampyrellid amoeba Strigomyxa ruptor gen. et sp. nov. and its remarkable strategy to acquire algal cell contents

Suthaus, Andreas ; Hess, Sebastian (2024)
The vampyrellid amoeba Strigomyxa ruptor gen. et sp. nov. and its remarkable strategy to acquire algal cell contents.
In: Ecology and Evolution, 2024, 14 (8)
doi: 10.26083/tuprints-00028304
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: The vampyrellid amoeba Strigomyxa ruptor gen. et sp. nov. and its remarkable strategy to acquire algal cell contents
Language: English
Date: 4 November 2024
Place of Publication: Darmstadt
Year of primary publication: August 2024
Publisher: John Wiley & Sons
Journal or Publication Title: Ecology and Evolution
Volume of the journal: 14
Issue Number: 8
Collation: 15 Seiten
DOI: 10.26083/tuprints-00028304
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

The vampire amoebae (Vampyrellida, Rhizaria) inhabit freshwater, marine, and terrestrial ecosystems and consume a wide range of eukaryotic prey. This includes diverse microalgae, fungi, and microscopic animals. One of the most captivating aspects of the vampyrellids is their ability to extract the cell contents of other eukaryotes after local dissolution of the prey cell wall, a feeding strategy that occurs in several vampyrellid families, but is best studied in Vampyrella species that attack zygnematophyte green algae. Here, we report two new vampyrellid strains from temperate moorlands in Germany with a yet‐undescribed feeding strategy: internal protoplast extraction and cell wall regurgitation. This feeding strategy involves the phagocytosis of whole desmid cells (genus Closterium, Zygnematophyceae), internal cleavage of the algal cell wall, extraction of the cell contents, and subsequent exocytosis of bundled empty cell walls. The large primary food vacuole formed during the process has exceptional functions, as it forms internal feeding pseudopodia, packages algal cell contents into smaller secondary vacuoles, and transforms into a "waste vacuole" with cell wall remnants. The new feeding strategy, which – in the widest sense – is reminiscent of the pellet casting of owls, reveals a stunningly sophisticated behavior of single protist cells. Based on morphological, phylogenetic, and autecological data, both vampyrellid strains are nearly identical and here assigned to a new and quite unique vampyrellid taxon, Strigomyxa ruptor gen. et sp. nov. (Leptophryidae, Vampyrellida).

Uncontrolled Keywords: algae, amoebae, Cercozoa, Endomyxa, Rhizaria, Zygnematophyceae
Identification Number: Artikel-ID: e70191
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-283042
Classification DDC: 500 Science and mathematics > 570 Life sciences, biology
Divisions: 10 Department of Biology > Biology of Algae and Protozoa
Date Deposited: 04 Nov 2024 13:08
Last Modified: 07 Nov 2024 08:52
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/28304
PPN: 52322592X
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