The Aschelminthes (Aeschelminthes or Nemathelminthes), closely associated with the Platyhelminthes, are an obsolete phylum of pseudocoelomate and other similar animals that are no longer considered closely related and have been promoted to phyla in their own right. The term Aschelminth is now generally only used as an informal name for any member of the approximately ten different invertebrate phyla formerly included within Aschelminthes.
It is a polyphyletic group.[1]
Subdivisions
[edit]Although invertebrate experts[2] do not necessarily agree on these categorizations, groups that are generally incorporated into Aschelminthes include:
In addition, Cycliophora, Entoprocta[3] and Tardigrada are sometimes included.[4]
References
[edit]- ^ Winnepenninckx B, Backeljau T, Mackey LY, et al. (November 1995). "18S rRNA data indicate that Aschelminthes are polyphyletic in origin and consist of at least three distinct clades". Mol. Biol. Evol. 12 (6): 1132–7. doi:10.1093/oxfordjournals.molbev.a040287. PMID 8524046.
- ^ "Introduction to the "Aschelminth" Phyla". University of California Museum of Paleontology.
- ^ Kenneth M. Halanych (2004). "The New View of Animal Phylogeny". Annual Review of Ecology, Evolution, and Systematics. 35 (1): 229–256. doi:10.1146/annurev.ecolsys.35.112202.130124.
- ^ M., Kinchin, Ian (1994). The biology of tardigrades. Portland Press. p. 10. ISBN 1-85578-043-7. OCLC 702705558.
{{cite book}}: CS1 maint: multiple names: authors list (link)
External links
[edit]- Aschelminth information page (archived from the original on 2009-08-20)
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction