Pseudopediastrum boryanum
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| Pseudopediastrum boryanum | |
|---|---|
 | |
| Pseudopediastrum boryanum | |
Scientific classification  | |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Hydrodictyaceae |
| Genus: | Pseudopediastrum |
| Species: | P. boryanum |
| Binomial name | |
| Pseudopediastrum boryanum (Turpin) E.Hegewald[1] | |
| Synonyms[1] | |
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Pseudopediastrum boryanum is a species of green algae in the family Hydrodictyaceae. It is a freshwater, microscopic alga with has a cosmopolitan distribution. It is most commonly found in eutrophic waters, but may also be found in brackish water or oligo- or mesotrophic mountin water bodies.[2]
Pseudopediastrum boryanum consists of colonies of four, eight, 16, 32, or 64 cells (termed coenobia), which are arranged in a flat, star-like disc. Coenobia are typically 25–180 μm wide. The inner cells of the coenobium are polygonal, typically 6–20 μm and 5.7–22.5 μm. The marginal cells of the coenobium are typically 8–30 μm and 9–21 μm wide and are slightly to deeply notched, forming two projections; the two projections are up to as long as the rest of the cells and lie parallel to each other.[3] The cell wall is reticulate and is covered in granules situated at the corners of a triangular mesh;[4] it is highly resistant to decay due to the presence of sporopollenin.[5]
Pseudopediastrum boryanum, like related species, typically reproduces asexually by forming zoospores within the parental cell wall; the zoospores then join to form new coenobia. Sexual reproduction occurs and is isogamous, but only occurs rarely.[5]