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| Hydrodictyaceae | |
|---|---|
| |
| Pediastrum | |
Scientific classification 
| |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Hydrodictyaceae Dumortier, 1829 |
| Genera[1] | |
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See text | |
Hydrodictyaceae is a family of green algae in the order Sphaeropleales.[1] They are found in freshwater habitats worldwide.[2]
Members of this family are either unicellular or colonial. Cells are cylindrical, polyhedral, spherical, or sometimes nearly spherical. Cells contain a single parietal, chloroplast with a pyrenoid.[3] The cell wall may be smooth or covered in warts, ribs or other ornamentation.[4]
Reproduction can occur asexually or sexually. In asexual reproduction, the mother cell becomes a number of zoospores and swim inside the enlarged mother cell wall, until they attach to each other and become a new colony. In Tetraedron, the cells do not produce zoospores but produce autospores within the enlarged mother cell wall. Sexual reproduction, when observed, occurs via isogamous gametes.[2]
Because the cell wall of some Hydrodictyaceae contain sporopollenin, they decay very slowly and thus last long in the fossil record.[5]
- ^ a b Guiry, M.D.; Guiry, G.M. "Hydrodictyaceae". AlgaeBase. University of Galway. Retrieved 2024-11-29.
- ^ a b Buchheim, Mark; Buchheim, Julie; Carlson, Tracy; Braband, Anke; Hepperle, Dominik; Krienitz, Lothar; Wolf, Matthias; Hegewald, Eberhard (2005). "Phylogeny of the Hydrodictyaceae (Chlorophyceae): Inferences from rDNA Data". Journal of Phycology. 41 (5): 1039–1054. Bibcode:2005JPcgy..41.1039B. doi:10.1111/j.1529-8817.2005.00129.x. S2CID 83698514.
- ^ Philipose, M.T. (1967). Chlorococcales. New Delhi: Indian Council of Agricultural Research. pp. 1–365.
- ^ Komárek, J.; Fott, B. (1983). Chlorophyceae (Grünalgen), Ordnung Chlorococcales. Das Phytoplankton des Süßwassers (in German). E. Schweizerbart'sche Verlagsbuchhandlung. p. 1044.
- ^ Komárek, Jirí; Jankovská, Vlasta (2001). Review of the Green Algal Genus Pediastrum; Implication for Pollen-analytical Research. Bibliotheca Phycologica. Schweizerbart Science Publishers. p. 127. ISBN 978-3-443-60035-8.