Hyphochytriomycetes

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Hyphochytrids
Scientific classification
Domain: Eukarya
Kingdom: Chromalveolata
(unranked): Stramenopiles
Phylum: Hyphochytriomycota
Whittaker, 1969[1]
Class: Hyphochytriomycetes
Dick, 1983[2]
Subclass: Hyphochytriomycetidae
Dick, 2001[3]
Order: Hyphochytriales
Bessey, 1950[4]
Synonyms
  • Phylum Hyphochytridiomycota, orth. var.
    • Class Hyphochytridiomycetes Sparrow, 1958, Alexopoulos, 1962, orth. var.
    • Class Hyphochytrea Cavalier-Smith, 1986[5]
      • Order Hyphochytridae Cavalier-Smith, 1989[6]

Hyphochytrids are eukaryotic organisms in the group of Stramenopiles (Heterokonta), formerly classified as fungi or as protists.

Characteristics[edit]

They are distinguished by an anterior tinsel flagellum[7] on their zoospores. Also they have a rhizoidal or hypha-like vegetative system (hence the prefix "Hypho-").

Classification[edit]

This group may be put alternatively at the phylum, class, subclass or order level, being referred to as Hyphochytriomycota, Hyphochytriomycetes (or Hyphochytrea), Hyphochytriomycetidae (or Hyphochytridae) and Hyphochytriales, respectively. The variants Hyphochytridiomycota and Hyphochytridiomycetes are also sometimes used, presumably by analogy to the Chytridiomycetes, or due to the perpetuation of a typographical error. However, the stem is Hyphochytri- (from Hyphochytrium) and not Hyphochytridi- (from Chytridium).[8]

In the past the classes Hyphochytridiomycetes, Oomycetes and Chytridiomycetes were grouped together in the now obsolete taxon Mastigomycotina as fungi with flagellate spores or gametes. Now the Chytridiomycetes are still considered true fungi, but the other two sub-groups are classified in the kingdom Protista, or in the group Stramenopiles.

Hyphochytriomycetes are closely related to Oomycetes.[9]

Diversity[edit]

This is a relatively small group, composed of about 16 known species, which may be due in part, to sampling methods of scientists.

References[edit]

  1. ^ Whittaker, R.H. 1969. New concepts of kingdoms of organisms. Science 163:150-160
  2. ^ Dick, M.W. 1983. Validation of the class name Hyphochytriomycetes. In: Buczacki (ed.), Zoosporic Plant Pathogens, A Modern Perspective. London & New York: Academic Press.
  3. ^ M.W. Dick, Straminipilous Fungi: 330, 2001.
  4. ^ Bessey, E. A. 1950. Morphology and taxonomy of fungi, [1].
  5. ^ Cavalier-Smith, Prog. Phycol. Res. 4: 324, 1986.
  6. ^ Cavalier-Smith, In: Green, Leadbeater, and Diver (eds.), The Chromophyte Algae: 385 (1989).
  7. ^ "Chytridiomycota". Retrieved 2009-05-26. [dead link]
  8. ^ David, J. C. (2002). A preliminary catalogue of the names of fungi above the rank of order. Constancea 83: 1–30, [2].
  9. ^ Van der Auwera G, De Baere R, Van de Peer Y, De Rijk P, Van den Broeck I, De Wachter R (July 1995). "The phylogeny of the Hyphochytriomycota as deduced from ribosomal RNA sequences of Hyphochytrium catenoides". Mol. Biol. Evol. 12 (4): 671–8. PMID 7659021. 

Bibliography[edit]

External links[edit]

See also[edit]