Biology:Podohedriella
| Podohedriella | |
|---|---|
Scientific classification 
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| (unranked): | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Selenastraceae |
| Genus: | Podohedriella F.Hindák |
| Species | |
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Podohedriella is a genus of green algae in the family Selenastraceae.[1] It is found in freshwater habitats[2] or on damp wood.[3]
Description
Podohedriella consists of single cells or colonies of two, four, or eight cells, which are attached by one end to a substrate. Cells are 17 to 50 μm long and 1.5 to 4 μm wide, and fusiform to crescent-shaped or sigmoidal in outline.[3] Cells are heteropolar; the apical and basal ends are both pointed, but the apical ends are more sharply so.[2] Cells contain a single nucleus and a single parietal chloroplast with pyrenoids; however, the pyrenoids lack a starch sheath.[2]
As with other algae in the family Selenastraceae, reproduction occurs exclusively via autospores.[2]
Taxonomy
Podohedriella was circumscribed by the phycologist František Hindák in 1988.[3] He separated Podohedriella from the genus Podohedra by the absence of a pyrenoid.[3] Its autospores are also arranged in parallel (versus serially in Podohedra). The former characteristic is ambiguous; algae in the family Selenastraceae were often considered to lack pyrenoids. Pyrenoids are typically present, but may be impossible to view with light microscopy without staining.[2]
References
- ↑ See the NCBI webpage on Podohedriella. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. http://ftp.ncbi.nih.gov/pub/taxonomy/. Retrieved 2007-03-19.
- ↑ 2.0 2.1 2.2 2.3 2.4 Krienitz, Lothar; Ustinova, Iana; Friedl, Thomas; Huss, Volker A. R. (2001). "Traditional generic concepts versus 18S rRNA gene phylogeny in the green algal family Selenastraceae (Chlorophyceae, Chlorophyta)". Journal of Phycology 37 (5): 852–865. doi:10.1046/j.1529-8817.2001.01004.x.
- ↑ 3.0 3.1 3.2 3.3 Guiry, M.D.; Guiry, G.M. (2008). "Podohedriella". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/browse/taxonomy/?id=44333.
Wikidata ☰ Q7207000 entry
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