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The Phylum Chlorophyta is further organized into finer groupings including:


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Bryopsidophyceae is a class of chlorphyte green alga. [more]


Charophyceae is a taxon of green algae whose exact rank is the matter of some current debate. Some botanists recommend expanding the existing plant kingdom to include charophyceans and chlorophytes while others consider Charophyceae to be a class within either the divisions Chlorophyta, Streptophytina, or Streptophyta. Other systematists classify Charophyceae as a class under division Charophyta, with Chlorophyta remaining a distinct division. [more]


The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. For example the chlorophycean CW clade, and chlorophycean DO clade, are defined by the arrangement of their flagella. Members of the CW clade have flagella that are displaced in a "clockwise" (CW, 1?7 o'clock) direction e.g. Chlamydomonadales. Members of the DO clade have flagella that are "directly opposed" (DO, 12?6 o'clock) e.g. Sphaeropleales. They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b.The chloroplast may be discoid, plate-like, reticulate, cup-shaped, spiral or in different species. Most of the members have one or more storage bodies called Pyrenoids located in the chloroplast.Pyrenoids contain protein besides starch.Some algae may store food in the form of oil droplets.Green algae usually have a rigid cell wall made up of an inner layer of cellulose and outer layer of pectose. [more]



Not Assigned


In taxonomy, the Pedinomonadaceae are a family of algae. They are small (less than 3 ?m) single-celled algae. Each cell has a single flagellum. It has been proposed to be either in the Mamiellales or the Ulvophyceae, but it has not been studied enough to confidently place it. [more]


In taxonomy, the Pleurastrophyceae are a class of green algae, in the division Chlorophyta. It was created by Mattox and Stewart in 1984, containing four genera. More recent classifications tend to split the group. On the one hand, Tetraselmis seems to be a sister to the so-called UTC clade (Chlorophyceae, Trebouxiophyceae, and Ulvophyceae), thus making it part of the (paraphyletic) Prasinophyceae. The other three genera were Pleurastrum, Trebouxia, and , and most of the species which had been in those genera have been placed in the Trebouxiophyceae. However, Pleurastrum insigne, which had been specified as the type of Pleurastrophyceae, turns out to be part of the Chlorophyceae. [more]


In taxonomy, Prasinophytes are a class of the Division Chlorophyta. These are primitive eukaryotic, marine green algae. Its best known genus is Ostreococcus (seen at right), which is considered to be the smallest (ca. 0.95 ?m) free-living eukaryote and which has been detected in marine samples around the world. Prasinophytes are thought to have low cellular complexity, that is, they are naked cells that possess single, multiple or no flagellae and contain only a single chloroplast and a single mitochondrion. They also have very small genomes for a eukaryote (about 12Mbp). [more]


In taxonomy, the Trebouxiophyceae are a class of green algae, in the division Chlorophyta. [more]


The Ulvophyceae or Ulvophytes are class of green algae, distinguished mainly on the basis of ultrastructural morphology. The sea lettuce, Ulva, belongs here. Other well-known members include Ulothrix and Acetabularia. The Ulvophytes are diverse in their morphology and their habitat. Most are seaweeds such as those listed above. Others, such as Cladophora, Rhizoclonium and Pithophora live in fresh water and in some areas are considered weeds. [more]


Zygnematophyceae is an class of green algae. It contains two orders: Zygnematales and Desmidiales. [more]

At least 37 species and subspecies belong to the Class Zygnematophyceae.

More info about the Class Zygnematophyceae may be found here.


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Last Revised: October 03, 2013
2013/10/03 15:41:43