Podohedriella

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Podohedriella
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Sphaeropleales
Family: Selenastraceae
Genus: Podohedriella
Hindák
Type species
Podohedriella falcata
(Duringer) Hindák [1]
Species

Podohedriella is a genus of green algae in the family Selenastraceae. [2] It is found in freshwater habitats [3] or on damp wood. [1]

Contents

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. [1] Cells are heteropolar; the apical and basal ends are both pointed, but the apical ends are more sharply so. [3] Cells contain a single nucleus and a single parietal chloroplast with pyrenoids; however, the pyrenoids lack a starch sheath. [3]

As with other algae in the family Selenastraceae, reproduction occurs exclusively via autospores. [3]

Taxonomy

Podohedriella was circumscribed by the phycologist František Hindák in 1988. [1] He separated Podohedriella from the genus Podohedra by the absence of a pyrenoid. [1] 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. [3]

References

  1. 1 2 3 4 5 Guiry, M.D.; Guiry, G.M. "Podohedriella". AlgaeBase . University of Galway . Retrieved 2023-06-02.
  2. See the NCBI webpage on Podohedriella. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information . Retrieved 2007-03-19.
  3. 1 2 3 4 5 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. Bibcode:2001JPcgy..37..852K. doi: 10.1046/j.1529-8817.2001.01004.x . S2CID   84625065.