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Information about Mesomycetozoea

Mesomycetozoea
Scientific classification
Kingdom:Protista
Phylum:Choanozoa
Class:Mesomycetozoea
Orders


Dermocystida
Ichthyophonida
The Mesomycetozoea or DRIP clade are a small group of protists, mostly parasites of fish and other animals. One species, Rhinosporidium seeberi, infects birds and mammals, including humans. They are not particularly distinctive morphologically, appearing in host tissues as enlarged spheres or ovals containing spores, and most were originally classified in various groups of fungi, protozoa, and algae. However, they form a coherent group on molecular trees, closely related to both animals and fungi and so of interest to biologists studying their origins.

The name DRIP is an acronym for the first protozoa identified as members of the group - Dermocystidium, the rosette agent, Ichthyophonus, and Psorospermium. Cavalier-Smith later treated them as the class Ichthyosporea, since they were all parasites of fish. Since other new members have been added, Mendoza et al. suggested changing the name to Mesomycetozoea, which refers to their evolutionary position. Note the name Mesomycetozoa (without a second e) is also used to refer to this group, but Mendoza et al. use it as an alternate name for the phylum Choanozoa.

References

  • Mendoza L, Taylor J, Ajello L (2002). "The Class Mesomycetozoea: A Heterogeneous Group of Microorganisms at the Animal-Fungal Boundary". Annual Review of Microbiology 56: 315-344. 
Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Eukarya
Whittaker & Margulis, 1978

Kingdom: Protista*
Haeckel, 1866

Typical phyla
  • Chromalveolata
  • Chromista

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Choanozoa

Classes
  • Choanoflagellatea
  • Corallochytrids
  • Mesomycetozoea
  • Nucleariids


Choanozoa (Greek: χόανος (choanos) = "funnel" +
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Eukarya
Whittaker & Margulis, 1978

Kingdom: Protista*
Haeckel, 1866

Typical phyla
  • Chromalveolata
  • Chromista

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Parasitism is one version of symbiosis ("living together"), a phenomenon in which two organisms which are phylogenetically unrelated co-exist over a prolonged period of time, usually the lifetime of one of the individuals.
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Image showing a huge rhinosporidial mass in the oropharynx of a patient

Some recent publications on rhinosporidiosis and R. seeberi

Herr, R.A.et al., 1999.
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spore is a reproductive structure that is adapted for dispersion and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many plants, algae, fungi and some protozoans.
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Eukarya
Whittaker & Margulis, 1978
(unranked) Opisthokonta

Kingdom: Fungi
(L., 1753) R.T. Moore, 1980[1]

Subkingdom/Phyla

Chytridiomycota
Blastocladiomycota

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Professor Thomas (Tom) Cavalier-Smith (born October 21 1942), FRS, FRSC, NERC Professorial Fellow, is a Professor of Evolutionary Biology in the Department of Zoology, at the University of Oxford.
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Opisthokonta

Subgroups

Kingdom Animalia
Kingdom Fungi
Choanozoa
:Choanoflagellates
:Corallochytrids
:Mesomycetozoea

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