Cosmarium is the largest genus of desmids, with over 1,000 species. It is an artificial genus: the defining characteristics of the genus are vague and arbitrary, and there are some species that are intermediate between several different genera. [7]

Cosmarium is widespread in North America and most common in acidic, oligotrophic, aquatic environments. Some species occur in subaerial habitats or in alkaline, eutrophic ponds and lakes. There are many cosmopolitan species.

Sep 24, 2017 · Cosmarium is a non-motile, freshwater member of division Chlorophyceae (green algae). Asexual reproduction takes place by simple cell-division. Elongation of isthmus region and mitotic division of nucleus into two semi-cells each containing a nucleus.

Sep 8, 2024 · Cosmarium, a genus of green algae belonging to the family Desmidiaceae, is often overshadowed by more well-known plants in the aquatic world. However, these charming unicellular organisms play vital roles in the ecosystems they inhabit.

Cosmarium botrytis is a species of green algae in the family Desmidiaceae. It is a freshwater species with a worldwide distribution, [1] and has been recorded from all continents. [2]

Cosmarium is highly polyphyletic based on nuclear SSU rDNA (Gontcharov and Melkonian 2005). Similar genera: Disphinctium connatum and D. cucurbita appear to be synonyms with Cosmarium connatum and C. cucurbita respectively (Croasdale 1956). Habitat: Mainly in acidic, oligotrophic, aquatic environments.

Aug 5, 2011 · The Cosmarium strains characterised by a large photosynthetic capacity may be concomitantly attributed as algae adapted to high solar irradiation, according to the statistically positive correlations between rETR max and I k.

Jan 1, 2015 · Cosmarium species are among the most common of all conjugating green algae and some species of Cosmarium can be found in nearly every aquatic and subaerial habitat. The genus is most diverse in rich desmid habitats.

Cosmarium. Identification Numbers. TSN: 7848. Geography. Working with others to conserve, protect and enhance fish, wildlife, plants and their habitats for the continuing benefit of the American people. Footer Menu - Employment. Careers & Internships; Contracting; Footer Menu - …

Cosmarium is a single-celled placoderm desmid. The cells are deeply divided in the middle by a short isthmus that contains the nucleus. The two semicells are rounded in front view and flattened, oval, or elliptic in side view. The older half of the cell …