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The structure of these algae is unicellular, and lacks flagella.Although most desmid species are unicellular, some genera form chains of cells, called filaments. A few genera form non-filamentous colonies, with individual cells connected by threads or remnants of parent cell walls.
The starting point of Scenedesmus and related algae is in 1820, when Pierre Jean François Turpin observed these algae under a microscope. He classified them under the diatom genus Achnanthes; later authors moved them to different groups, until it was finally classified as a green alga. [1]
Micrasterias is a unicellular green alga of the order Desmidiales.Its species vary in size reaching up to hundreds of microns. Micrasterias displays a bilateral symmetry, with two mirror image semi-cells joined by a narrow isthmus containing the nucleus of the organism.
Chlamydomonas (/ ˌ k l æ m ɪ ˈ d ɒ m ə n ə s,-d ə ˈ m oʊ-/ KLAM-ih-DOM-ə-nəs, -də-MOH-) is a genus of green algae consisting of about 150 species [2] of unicellular flagellates, found in stagnant water and on damp soil, in freshwater, seawater, and even in snow as "snow algae". [3]
Heterosigma akashiwo is a species of microscopic algae of the class Raphidophyceae. [1] [2] It is a swimming marine alga that episodically forms toxic surface aggregations known as harmful algal bloom.
Cosmarium is a large genus of desmids (Desmidiaceae), a group of green algae closely related to the land plants (Embryophyta). [1] [2] Members of this genus are microscopic and found in freshwater habitats around the world. [3] The name Cosmarium comes from the Greek word κοσμάριον - kosmarion, meaning a small ornament. [4]
Toxic algae blooms in Whatcom County lakes are risky for pets and animals, but human beings should also avoid and report them. Most WA state lakes under-monitored for poisonous algae blooms ...
Volvox is a polyphyletic genus of chlorophyte green algae in the family Volvocaceae. Volvox species form spherical colonies of up to 50,000 cells, and for this reason they are sometimes called globe algae. They live in a variety of freshwater habitats, and were first reported by Antonie van Leeuwenhoek in 1700.