• Source: Eustigmatophyte

Eustigmatophytes are a small group (17 genera; ~107 species) of eukaryotic forms of algae that includes marine, freshwater and soil-living species.
All eustigmatophytes are unicellular, with coccoid cells and polysaccharide cell walls. Eustigmatophytes contain one or more yellow-green chloroplasts, which contain chlorophyll a and the accessory pigments violaxanthin and β-carotene. Eustigmatophyte zoids (gametes) possess a single or pair of flagella, originating from the apex of the cell. Unlike other heterokontophytes, eustigmatophyte zoids do not have typical photoreceptive organelles (or eyespots); instead an orange-red eyespot outside a chloroplast is located at the anterior end of the zoid.
Ecologically, eustigmatophytes occur as photosynthetic autotrophs across a range of systems. Most eustigmatophyte genera live in freshwater or in soil, although Nannochloropsis contains marine species of picophytoplankton (2–4 μm).
The class was erected to include some algae previously classified in the Xanthophyceae.




Classification


Class Eustigmatophyceae Hibberd & Leedale 1970
Order Eustigmatales Hibberd 1981
Genus Paraeustigmatos Fawley, Nemcová, & Fawley 2019
Family Eustigmataceae Hibberd 1981 [Chlorobothryaceae Pascher 1925; Pseudocharaciopsidaceae Lee & Bold ex Hibberd 1981]
Genus ?Ellipsoidion Pascher 1937
Genus Chlorobotrys Bohlin 1901
Genus Eustigmatos Hibberd 1981
Genus Pseudocharaciopsis Lee & Bold 1973
Genus Pseudostaurastrum Chodat 1921
Genus Vischeria Pascher 1938 - 16 spp.
Family Monodopsidaceae Hibberd 1981 [Loboceae Hegewald 2007]
Genus Microchloropsis Fawley, Jameson & Fawley 2015
Genus Monodopsis Hibberd 1981
Genus Nannochloropsis Hibberd 1981
Genus Pseudotetraedriella Hegewald & Padisák 2007
Family Neomonodaceae Amaral et al. 2020
Genus ?Botryochloropsis Preisig & Wilhelm 1989
Genus Characiopsiella Amaral et al. 2020
Genus Munda Amaral et al. 2020
Genus Neomonodus Amaral et al. 2020
Genus Pseudellipsoidion Neustupa & Nemková 2001
Order Goniochloridales Fawley, Elias & Fawley 2013
Family Goniochloridaceae
Genus Goniochloris Geitler 1928
Genus Pseudostaurastrum Chodat 1921
Genus Tetraedriella Pascher 1930
Genus Trachydiscus H.Ettl 1964
Genus Vacuoliviride Nakayama et al. 2015




Phylogeny


Phylogeny of Eustigmatophyceae based on the work of Amaral et al 2020




References

Kata Kunci Pencarian:

• Eustigmatophyte
• Plankton
• Algae
• Flagellate
• Phytoplankton
• Zooplankton
• Vaucheria
• Tetraedron
• Protist
• Ichthyoplankton