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Some recent major publications, eg. Adl et al. (2005) treat Eumetazoa as a synonym of Animalia, excluding Porifera and some other Metazoa, eg. Placozoa.


  • Adl, S.M. et al. 2005: The new higher level classification of eukaryotes with emphasis on the taxonomy of protists. Journal of eukaryotic microbiology, 52(5): 399-451.

Are Radiata and Bilateria Superphylum?[edit]

Don't they locate in between Subregnum and Superphylum?

It says in here that a taxon, Bilateria doesn't belong to any rank. Superphylum is actually one below Bilateria and Radiata.


So, spiders are.... added signature Lycaon 22:31, 5 February 2006 (UTC)Reply[reply]

Protostomia and ecdysozoa aren't mutually exclusive. As far as I know, taxonomy based on genetic comparisions that indicate common ancestry (as opposed to the traditional categorization by body-plan) gives rise to two sub-categories/clades of protostomia: lophotrochozoa and ecdysozoa. Spiders are arthropods, which fall into the ecdysozoa category. Epb 19:14, 16 April 2005 (UTC) added signature Lycaon 22:31, 5 February 2006 (UTC)Reply[reply]


The following shouldn't be on the main page. This section is inconsistent with the content of most other pages. It is important that we have standards. If anything, this section should not be within the Taxonavigation section. Maybe we will eventually have such a section on all of the pages but in the mean time we need to do other things... Totipotent 22:41, 17 June 2006 (UTC)Reply[reply]

  • Radiata are radially symmetric animals like jellyfish.
  • Bilateria are bilaterally symmetric animals and have three germ layers, like humans or worms.
    • Protostomia, the first opening during gastrulation later becomes the mouth, like spiders and snails.
      • Spiralia, embryo undergoes spiral cleavage.
      • Ecdysozoa are molting animals like spiders; includes arthropods and roundworms.
    • Deuterostomia, the first opening during gastrulation later becomes the anus; like birds, fish, mammals and reptiles.

Order of explainations[edit]

Just a quick point but why are the links and explanations in a different order? If there isn't a good reason then should it be changed? 21:51, 5 February 2006 (UTC)Reply[reply]

good observation: yes they should be changed. Lycaon 22:27, 5 February 2006 (UTC)Reply[reply]

Alternative Systematics[edit]

Something needs to be done to the Eumetazoa page to clean it up. I suggest placing the following in the discussion area or shifting it under a Alternative Systematics heading. Lycaon we need your advice.Totipotent 15:01, 3 June 2006 (UTC)Reply[reply]

The following shouldn't be on the main page...if anything, in their current format... Totipotent 22:41, 17 June 2006 (UTC)Reply[reply]

Alternative Superphylum: Radiata - Bilateria: Deuterostomia - Lophotrochozoa/Spiralia - Platyzoa/Spiralia - Ecdysozoa

  • Protostomia is further divided (by some) into Ecdysozoa and Lophotrochozoa/Spiralia, there is no consensus how this taxa should be termed, branch is usually used.
  • Platyzoa is a relatively new subdivision of Protostomia, along with Lophotrochozoa they are called Spiralia.