Pteromonas

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Pteromonas
Pteromonas sp.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Chlamydomonadales
Family: Phacotaceae
Genus: Pteromonas
Seligo
Type species
Pteromonas aculeata
Seligo [1]
Species

Pteromonas is a genus of green algae in the family Phacotaceae. [2] It has a cosmopolitan distribution, [1] and mainly occurs in nutrient-rich freshwaters. [3]

Pteromonas is a unicellular, motile organism with two flagella; the protoplast of the cell is contained in a transparent, [4] flattened shell called a lorica. The two flagella emerge from separate openings in the anterior of the lorica. The lorica consists of two equal parts pressed together at their margins, forming a keel. The lorica is variously shaped, and may be undulate or spiny. The protoplast is pyriform, ovoid or globose and compressed. Cells contain a cup-shaped chloroplast with one or more pyrenoids and usually an stigma. Two contractile vacuoles are present at the base of the flagella. [1]

Asexual reproduction involves the division of the protoplast into two or four daughter cells, which are released when the two halves of the lorica separate. Sexual reproduction is isogamous; the two gametes fuse and develop into a globose zygote with a smooth cell wall. [1]

Species are distinguished based on the general morphology (size, shape and placement of "wings") of the lorica, and number and position of pyrenoids. [1]

References

  1. 1 2 3 4 5 Guiry, M.D.; Guiry, G.M. "Pteromonas Seligo, 1887". AlgaeBase . University of Galway . Retrieved 2025-04-01.
  2. See the NCBI webpage on Pteromonas. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information . Retrieved 2007-03-19.
  3. John, David M.; Whitton, Brian A.; Brook, Alan J. (2021). The Freshwater Algal Flora of the British Isles (2 ed.). Cambridge University Press. p. 896. doi:10.1017/CHOL9781108784122. ISBN   978-1-108-78412-2.
  4. Nakada, Takashi; Nozaki, Hisayoshi (2014). "Chapter 6. Flagellate 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. pp. 265–313. ISBN   978-0-12-385876-4.