Armaparvus browni sp. nov. (Amoebozoa, Cutosea) isolated from an inland brackish water biotope

IF 1.9 2区生物学 Q4 MICROBIOLOGY

European journal of protistology Pub Date : 2025-03-04 DOI:10.1016/j.ejop.2025.126139

Alexander Kudryavtsev , Mikhail Krendelev, Ekaterina Piven, Ekaterina Volkova

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Abstract

A tiny amoebozoan with a locomotive size of about 10 μm was isolated from an inland brackish water biotope in the northwest of Russia. During locomotion, amoebae were flattened, with broad anterior hyaloplasm and short ventral subpseudopodia that appeared like small bumps. Electron microscopy shows that amoebae are enclosed in a flexible layer of flat oval scales embedded in a matrix and separated from the plasma membrane surface. These characters are in accordance with the phylogenetic placement of this strain, as reconstructed using the nuclear SSU rRNA, actin, and mitochondrial cytochrome c oxidase subunit 1 (Cox1) gene sequences. Morphology and molecular phylogenies warrant the description of the studied strain as a new species, Armaparvus browni sp. nov. This species shows a broad range of salinity tolerance, being able to reproduce in culture under salinity of 2.5 ‰, but not in 0.3 ‰ or artificial freshwater medium. This may be due to an adaptation to brackish water with oscillating salinity and hence A. browni probably cannot expand into truly freshwater habitats.

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来源期刊

European journal of protistology 生物-微生物学

CiteScore

4.60

自引率

20.70%

发文量

审稿时长

14.6 weeks

期刊介绍： Articles deal with protists, unicellular organisms encountered free-living in various habitats or as parasites or used in basic research or applications. The European Journal of Protistology covers topics such as the structure and systematics of protists, their development, ecology, molecular biology and physiology. Beside publishing original articles the journal offers a forum for announcing scientific meetings. Reviews of recently published books are included as well. With its diversity of topics, the European Journal of Protistology is an essential source of information for every active protistologist and for biologists of various fields.