Myxosporea
Myxosporea | |
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Kudoa septempunctata - spores | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Cnidaria |
Subphylum: | Myxozoa |
Class: | Myxosporea Buetchli 1881 |
Orders | |
Synonyms | |
|
Myxosporea is a
Taxonomic status
The taxonomy of both actinosporeans and myxosporeans was originally based on spore morphology. In 1994 the phylum Myxozoa was redefined to solve the taxonomic and nomenclatural problems arising from the two-host life cycle of myxozoans.[1][2] The distinction between the two previously recognised classes Actinosporea and Myxosporea disappeared and the class Actinosporea was suppressed, becoming a synonym of the class Myxosporea (Bütschli, 1881). The generic names of actinosporeans were retained as collective "type" names, and it was proposed that they be used to characterise different morphological forms of actinosporeans. Those remaining actinosporeans whose myxosporean stage is unattested are being retained as species inquirenda until their specific identity is established.
It has been hypothesized that myxosporeans might have evolved from a
Transmission
Until the 1980s, direct transmission of myxosporeans was presumed. In 1984, it was shown experimentally that spores of
Direct transmission between fish has also been demonstrated, so far in three species of Enteromyxum.
Examples of Myxosporean genera are Kudoa, which attacks fish muscle,[6] and Myxobolus, which attacks the hearts of freshwater fishes.[7]
References
- doi:10.1139/z94-126.
- ^ PMID 17770061.
- PMID 30674330.
- ^ Wilcox, Christie (19 August 2019). "Can New Species Evolve From Cancers? Maybe. Here's How". Quanta Magazine. New York City: Simons Foundation. Retrieved 6 December 2019.
- PMID 9379291.
- ISSN 1432-1955.
- ISSN 1984-2961.