.

Nældecelledyr eller Polypdyr er en gruppe af relativt enkle flercellede dyr der lever i vandet og hovedsagelig i havet.

• Række Cnidaria (Nældecelledyr eller Polypdyr)
  • Klasse Anthozoa (Koraldyr)
  • Medusozoa
    • Klasse Scyphozoa (Store gopler)
      • Underklasse Scyphomedusae
        • Orden Coronatae
        • Orden Semaeostomeae
          • Cyaniidae (bl.a. brandmand)
          • Pelagiidae
          • Ulmaridae (bl.a. vandmand)
        • Orden Rhizostomeae
        • Orden Stauromedusae
  • Klasse Cubozoa (bl.a. havhveps)
    • Orden Cubomedusae
  • Klasse Hydrozoa (Små gopler)
    • Campanularidae
      • Laomedea
      • Obelia
      • Hydridae
        • Hydra (små polyper der lever i ferskvand)
      • Sertulariidae
        • Dynamena
    • Klasse Polypodiozoa
  • ?-Endocnidozoa

Kilde/reference

• Systema Naturae 2000: Cnidaria

Eksterne henvisninger

• Nettverk for miljølære: Artstre: Nesledyr (Cnidaria)
• Protozoer hydra (pdf)
• Tree of Life: Cnidaria
• urekalert.org: New 'bumpy' jelly found in deep sea Citat: "...unique features resulted in the jelly's categorization as a new genus and species...genus, Stellamedusa...ventana...", billeder
• May 12 2005, : Strange denizen of the deep has 24 eyes Citat: "...The box jellyfish...with 24 eyes to give itself all-round vision even though it lacks a brain to handle what they see..."
• BBC News: Deep-sea animal hunts with light Citat: "...A new species of deep-sea animal has been discovered, which uses glowing red tentacles to lure small fish to their deaths...genus Erenna..."

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