Klebsormidium
Klebsormidium is a genus of filamentous charophyte green algae comprising 20 species. The name was proposed in 1972 to resolve confusion in application and status of Hormidium and was given for the German botanist Georg Albrecht Klebs. The algae occurs mostly in soil and on moist substrates, nevertheless, aquatic and one marine species are also known. Many Klebsormidium-species are able to synthesize substances for UV protection, the so-called mycosporine-like amino acids. The draft genome sequence of Klebsormidium nitens NIES-2285 (called K. flaccidum at the time of publication) was published in 2014. Description 
Klebsormidium forms uniseriate (one cell thick), unbranched filaments. Cells are cylindrical or barrel-shaped. The cell wall may be thin or thickened, and is sometimes made of "H"-shaped pieces. Each cell contains a single parietal chloroplast which encircles around 40 to 70% of the cell wall, usually with a single pyrenoid. Klebsormidium reproduces asexually but not sexually. It produces zoospores with two flagella, which are released from cells through a pore. It can also produce aplanospores and akinetes. The genus can be difficult to distinguish from Ulothrix, but Ulothrix tends to have chloroplasts that are wider and encircling nearly all of the cell. Species 
The  valid species currently considered to belong to this genus are:

 Klebsormidium acidophilum
 Klebsormidium bilatum
 Klebsormidium crenulatum
 Klebsormidium dissectum
 Klebsormidium drouetii
 Klebsormidium elegans
 Klebsormidium flaccidum
 Klebsormidium fluitans
 Klebsormidium fragile
 Klebsormidium klebsii
 Klebsormidium lamellosum
 Klebsormidium montanum
 Klebsormidium mucosum
 Klebsormidium nitens
 Klebsormidium pseudostichococcus
 Klebsormidium scopulinum
 Klebsormidium sterile
 Klebsormidium subtile
 Klebsormidium subtilissimum
 Klebsormidium tribonematoideum

The species of Klebsormidium are in critical need of a taxonomic revision. Traditional morphological characteristics used to delimit the taxa, such as the width of filaments or shape of cells, are unreliable and do not map well to phylogenetic groups. Notes

References

External links

 Images  of Klebsormidium at Algaebase

Charophyta
Charophyta genera