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Metazoa: Zoology

Acrania
Inverterata
Vertebrata

• Cladogram for Metazoa
  Introduction to the Metazoa (University of California, Berkeley) - Life History and Ecology, Systematics, More on the Morphology.
• Metazoa - Systematics.
• Vielzeller (Metazoa) - Text und Abbildung.