Semaeostomeae
"Discomedusae". Plate from Ernst Haeckel's Kunstformen der Natur, 1904. Species at center is Cyanea annasethe, named after Haeckel's late wife Anna Sethe.
Scientific classification
Kingdom: Animalia Phylum: Cnidaria Class: Scyphozoa Order: Semaeostomeae L. Agassiz, 1862
Families
See text.

Semaeostomeae (literally "flag mouth") is an order of large jellyfish characterized by four long, frilly oral arms flanking its quadrate "mouth". Its gastrovascular system consists of unbranched pouches and it has no ring canal. Five families have been described.

Families

• Cyaneidae
• Depastridae
• Halicyathidae
• Pelagiidae
• Ulmaridae

Gallery

References

• Ruppert, Edward E.; and Fox, Richard S. (1988). Seashore Animals of the Southeast, University of South Carolina Press, 273. ISBN 0-87249-535-3.
• Hayward, Peter J.; and Ryland, John S. (1995). Handbook of the Marine Fauna of North-West Europe, Oxford University Press, 65. ISBN 0-19-854055-8.

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