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INVERTEBRATES Scyphozoa

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Class Scyphozoa

(Cambrian - Recent)

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Members of this class are large free swimming marine organisms.  The medusa is the dominant phase in the life cycle and the polyp stage is either absent or it is small and gives rise to medusae by asexual budding.  There is a strong four-fold symmetry.



<==o SCYPHOZOA
   |--o STAUROMEDUSAE
   |  |-- Cleistocarpidae
   |  `-- Eleutherocarpidae
   |--o CORONATAE
   |  |-- Atollidae
   |  |-- Atorellidae
   |  |-- Linuchidae
   |  |-- Nausithoidae
   |  |-- Paraphyllinidae
   |  |-- Periphyllidae
   |  `-- Tetraplatidae
   |--o SEMAEOSTOMEAE
   |  |-- Cyaneidae
   |  |-- Pelagiidae
   |  `-- Ulmariidae
   `--o RHIZOSTOMEAE
      |-- Cassiopeidae
      |-- Catostylidae
      |-- Cepheidae
      |-- Lobonematidae
      |-- Lychnorhizidae
      |-- Mastigiidae
      |-- Rhizostomatidae
      |-- Stomolophidae
      |-- Thysanostomatidae
      `-- Versurigidae
Cladogram Reference(s):

Parker, S. P. (ed.), 1982: Synopsis and classification of living organisms. Vols. 1 & 2 --McGrew-Hill Book Company





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page uploaded 16 June 2002
checked ATW030411
(originally uploaded on Kheper Site 4 June 1999)
cladogram © Mikko Haaramo
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Text other than cladograms by M. Alan Kazlev
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