Sea Daisies: Concentricycloidea
Medusiform Sea Daisy (xyloplax Medusiformis): Species Account
Physical characteristics: Medusiform (mih-DOO-seh-form) sea daisies are circular and slightly inflated. The body is 0.4 inches (9 millimeters) across, including the spines around the rim. The spines are all one length: 0.002 to 0.003 inches (40 to 75 micrometers). The mouth frame has ten to thirty bones. Medusiform sea daisies do not have a stomach. Instead there is a thin, flexible sheet on the bottom surface of the daisy that is supported by the mouth frame.
Geographic range: Medusiform sea daisies live on the east and west coasts of New Zealand.
Habitat: Medusiform sea daisies live on sunken wood in deep water.
Diet: Medusiform sea daisies absorb dissolved nutrients from decomposing wood.
Behavior and reproduction: Scientists do not know how medusiform sea daisies behave. They have separate sexes and mate. The young develop inside the females.
Medusiform sea daisies and people: Medusiform sea daisies have no known importance to people.
Conservation status: Medusiform sea daisies are not considered threatened or endangered. ∎
FOR MORE INFORMATION
Brusca, Richard C., Gary J. Brusca, and Nancy Haver. Invertebrates. 2nd ed. Sunderland, MA: Sinauer, 2002.
Voight, Janet R. "How to Study Animals in Habitiats You've Never Seen." In the Field (spring 2005): 16–17.
"The Echinoderm Phylum." University of Washington School of Aquatic and Fishery Sciences. http://www.fish.washington.edu/classes/fish310/PDF/echino.pdf (accessed on March 9, 2005).
Animal Life ResourceJellyfish, Sponges, and Other Simple AnimalsSea Daisies: Concentricycloidea - Physical Characteristics, Behavior And Reproduction, Medusiform Sea Daisy (xyloplax Medusiformis): Species Account - GEOGRAPHIC RANGE, HABITAT, DIET, SEA DAISIES AND PEOPLE, CONSERVATION STATUS