Cnidaria
Cnidaria Cnidaria

Cnidaria

Metazoa ├─Porifera paraphyletic?) └─Radiata ├─Ctenophora └─┬─Cnidaria │ ├─Anthozoa │ └─┬─Hydrozoa │ └─┬─┬─Scyphozoa │ │ └─Cubozoa │ └─Conulata └─Bilateria ├─Deuterostomia └─Protostomia ├─Ecdysozoa └─Lophotrochozoa

The Cnidaria  
Symmetry

Body Form
The deadly Nematocysts
Evolutionary history
Classification
Links

Ptilosarcus gurneyi
Ptilosarcus gurneyi
A close-up of the Orange Sea Pen
Class Anthozoa - Subclass Octocorallia - Order Pennatulacea - Suborder Subselliflorae - Family Pennatulidae
image copyright © Keith Clements and Jon Gross Marine Life of the Northeast Pacific

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Text by M. Alan Kazlev (Creative Commons Attribution)
page uploaded 16 June 2002, last modified 2 May 2003
(originally uploaded on Kheper Site 3 June 1999)
checked ATW060205