Wilhelm Schmidle

Ulvellaceae is a family of green algae in the order Ulvales. Ulvellaceae consists of macroscopic and macroscopic algae that are usually attached to a substrate, occasionally free-living. They form branched filaments or pseudoparenchymatous masses. Cells contain a single nucleus and a single parietal chloroplast with one to several pyrenoids. Both asexual and sexual reproduction have been observed in representatives of Ulvellaceae.

Kirchneriella is a genus of green algae in the family Selenastraceae. It is found in freshwater habitats, as phytoplankton or metaphyton. The genus name of Kirchneriella is in honour of Emil Otto Oskar von Kirchner (1851–1925), who was a German botanist and agronomist. The genus was circumscribed by Wilhelm Schmidle in Ber. Naturf. Ges. Freiburg vol.7 on page 82 in 189.

Coccomyxa is a genus of green algae in the family Coccomyxaceae. This genus is defined by their small, elliptical to spherical shape, and the presence of a simple parietal chloroplast. These features, along with their occurrence in various lifestyles such as free-living, parasitic, or as photobionts, have been used to identify more than 40 species. Using additional morphological features, such as brown akinetes formation, allows for the differentiation between Coccomyxa and the genus Pseudococcomyxa, as they tend to share some morphological characteristics like the general cell shape and

Radiococcus is a genus of green algae in the family Radiococcaceae. It is found in the plankton of freshwater habitats. Radiococcus consists of colonies of cells embedded in a mucilage; the mucilage may have radial striations. Cells are 3–15 μm in diameter, often grouped into tetrads or arranged in a ring. The cell walls are mostly smooth, although in some species they may be warty (verrucose). Cells have a single nucleus and a single parietal chloroplast with one pyrenoid. Radiococcus reproduces asexually via the formation of autospores. Four to eight autospores are produced per sporangium;

Polyedriopsis is a genus of green algae in the order Sphaeropleales. As of February 2022, it contained a single species, Polyedriopsis spinulosa. It is found worldwide in freshwater habitats as phytoplankton, but is rare. Polyedriopsis spinulosa consists of solitary or sometimes clustered cells, 12–25 μm in diameter. They are four- or five-sided with concave sides; the corners are rounded off and bear a tuft of 3-10 thin tapering spines, 25–50 μm long. Cells are uninuclate (with one nucleus and contain a single parietal chloroplast with one pyrenoid. Polyedriopsis spinulosa reproduces

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