Loogisella

Loogisella is a genus of unicellular green algae in the division Chlorophyta. Members are found in freshwater habitats and are often observed as small, free-living cells or in simple filaments. The genus comprises several described species and is studied primarily in phycology and limnology.

They are typically 6–12 micrometers in diameter, spherical to slightly oblong, with a single cup-shaped chloroplast and one or more pyrenoids. Reproduction is primarily asexual by autospores; sexual reproduction appears rare in observed populations.

The genus was established in 1989 by Chen and Sato. The type species is Loogisella rivularis. Other described species include Loogisella lacustris and Loogisella borealis.

Loogisella inhabits temperate freshwater systems, including lakes, rivers, and wetlands. It has a global but patchy distribution, with records in Europe, North America, and parts of Asia. The algae contribute to primary production and form a component of microbial biofilms.