Description of a new species of marine amoeba Korotnevella mutabilis n. sp. (Amoebozoa, Dactylopodida).

Korotnevella (Amoebozoa, Dactylopodida) is a genus of naked lobose amoebae with a dactylopodial morphotype. The cell membrane of these amoebae is covered with a monolayer of scales. The structure and size of scales are considered as species-specific features.

Stygamoeba cauta n. sp. (Amoebozoa, Discosea) - a new brackish-water species from Nivå Bay (Baltic Sea, The Sound).

Several evolutionary lineages of Amoebozoa are characterized by unusual morphological and ultrastructural features that impede resolving of their position in the phylogenetic tree. Among them is the genus Stygamoeba, not yet reliably placed on the phylogenetic tree even by a phylogenomic analysis. Only two species of Stygamoeba are known at present, and molecular data exists on one species only.

Pseudoparamoeba garorimi n. sp., with Notes on Species Distinctions within the Genus.

A new marine species of naked lobose amoebae Pseudoparamoeba garorimi n. sp. (Amoebozoa, Dactylopodida) isolated from intertidal marine sediments of Garorim Bay, Korea was studied with light and transmission electron microscopy.