Quadrigula

Quadrigula
Scientific classification
Domain:	Eukaryota
Supergroup:	Archaeplastida
Clade:	Viridiplantae
Division:	Chlorophyta
Class:	Chlorophyceae
Order:	Sphaeropleales
Family:	Selenastraceae
Genus:	Quadrigula; Printz
Type species
	Quadrigula closterioides; (Bohlin) Printz
Species
	Quadrigula chodatii; Quadrigula closterioides;

Quadrigula is a genus of green algae in the family Selenastraceae. It is commonly found in freshwater habitats as phytoplankton.

Description

Quadrigula forms colonies of two, four, or cells within a common mucilaginous envelope. Cells are cigar-shaped, 7 to 45 μm long and 1 to 8 μm wide. The cells are bundled such that the long axes of cells are parallel to each other. The tips of the cells are rounded or acutely pointed. Cells contain a single nucleus and one parietal chloroplast; the chloroplast may or may not contain a pyrenoid.

Species identification relies on details of the cell size and shape.

References

1 2 3 Guiry, M.D.; Guiry, G.M. "Quadrigula". AlgaeBase. University of Galway. Retrieved 2023-06-03.
↑ See the NCBI webpage on Quadrigula. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
1 2 Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.

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[AlgaeBase-1] 1 2 3 Guiry, M.D.; Guiry, G.M. "Quadrigula". AlgaeBase. University of Galway. Retrieved 2023-06-03.

[2] See the NCBI webpage on Quadrigula. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.

[Shubert2014-3] 1 2 Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.