Semaeostomeae

Taxobox
name = Semaeostomeae

---

image_width = 250px
image_caption = "Discomedusae". Plate from Ernst Haeckel's "Kunstformen der Natur", 1904. Species at center is "Cyanea annasethe", named after Haeckel's late wife Anna Sethe.
regnum = Animalia
phylum = Cnidaria
classis = Scyphozoa
ordo = Semaeostomeae
ordo_authority = L. Agassiz, 1862
subdivision_ranks = Families
subdivision = 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.