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Title: Chlamydomonadales  
Author: World Heritage Encyclopedia
Language: English
Subject: Chlorophyceae, Volvocales, Chlamydomonas reinhardtii, Polytoma, List of plant orders, Haematococcus pluvialis
Publisher: World Heritage Encyclopedia


(A) Gonium pectorale, (B) Eudorina elegans, (C) Pleodorina californica, and (D) Volvox carteri
Scientific classification
Domain: Eukaryota
Kingdom: Plantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Volvocales
  • Chlamydomonadales
  • Volvocida

In taxonomy, the Volvocales, also known as Chlamydomonadales, are an order of flagellate or pseudociliate green algae, specifically of the Chlorophyceae.[1] Volvocales can form planar or spherical colonies. These vary from Gonium (4 to 32 cells) up to Volvox (500 cells or more). Each cell has two flagella, and is similar in appearance to Chlamydomonas, with the flagella throughout the colony moving in coordination.

Both asexual and sexual reproduction occur. In the former, cells divide until they form new colonies, which are then released. In the smaller forms typically all cells are involved, but larger forms have anterior vegetative and posterior reproductive cells. Sexual reproduction varies from isogamy (both genders produce flagellate gametes of equal size) to oogamy (one gender produces a much larger, non-motile gamete).

The classification of the Volvocales varies. Very often they are taken to include the orders Chlamydomonadales and Dunallielales, which contain closely related unicellular flagellates, as suborders.


External links

Scientific references

  • PubMed references for Chlamydomonadales
  • PubMed Central references for Chlamydomonadales
  • Google Scholar references for Chlamydomonadales

Scientific databases

  • NCBI taxonomy page for Chlamydomonadales
  • Search Tree of Life taxonomy pages for Chlamydomonadales
  • Search Species2000 page for Chlamydomonadales
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