Animal Diversity Web

Trachymedusae

Kingdom Animalia (animals)
- Eumetazoa (metazoans)
  - Phylum Cnidaria (corals, sea anemones, jellyfish, and relatives)
    - Class Hydrozoa
      - Order Trachymedusae
        
        Family Geryoniidae
        
        Family Halecreatidae
        
        Family Halicreatidae
        
        Family Petasidae
        
        Family Ptychogastriidae
        
        Family Rhopalonematidae