Didemnum
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| Didemnum | |
|---|---|
 | |
| Tunicate colonies of Didemnum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Tunicata |
| Class: | Ascidiacea |
| Order: | Aplousobranchia |
| Family: | Didemnidae |
| Genus: | Didemnum Savigny, 1816 |
Didemnum is a genus of tunicates in the family Didemnidae. Some species of Didemnum can be characterized as invasive species. This is particularly an issue off the east coast of the United States, where in early 2006, Didemnum were estimated to inhabit more than 175 square kilometers of this undersea region. Other areas where Didemnum are seen as invasive include Canada, New Zealand and the Netherlands.[1]
Didemnum vexillum turned up on coast of state of Washington in 2009 and has been showing up in Coos Bay and Winchester Bay, Oregon as of 13 May 2010.[2]
Species
- Didemnum albidum (Verrill, 1871)
- Didemnum amethysteum (Van Name, 1902)
- Didemnum asperum (Milne-Edwards, 1841)
- Didemnum biglans (Sluiter, 1906)
- Didemnum candidum (Savigny, 1816)
- Didemnum carnulentum (Ritter and Forsyth, 1917)
- Didemnum chilense (Arnbaeck, 1929)
- Didemnum coriaceum (Von Drasche, 1883)
- Didemnum fulgens (Milne-Edwards, 1841)
- Didemnum galacteum (Lotufo and Dias, 2007
- Didemnum gelatinosum
- Didemnum helgolandicum
- Didemnum lahillei (Hartmeyer, 1909)
- Didemnum maculosum (Milne-Edwards, 1841)
- Didemnum molle (Herdmann, 1886)
- Didemnum santaelenae (Van Name, 1945)
- Didemnum studeri (Hartmeyer, 1911)
- Didemnum tenue (Herdmann, 1886)
- Didemnum vanderhorsti (Van Name, 1924)
- Didemnum vexillum (Kott, 2002)
Tunicate colonies of Didemnum sp. overgrowing the fronds of dark green algae. These colonies can quickly overgrow most surfaces and other organisms.
References
- ↑ "Invasion der Pfankuchen" Der Spiegel, 1/2006, p. 102
- ↑ http://www.oregonlive.com/environment/index.ssf/2010/05/fast-growing_invasive_species.html
- Woods Hole
- (USGS) National Geologic Studies of Benthic Habitats, Northeastern United States has a Marine Nuisance Species page dedicated to this genus
External links
- Species Profile- Sea Squirt (Didemnum vexillum), National Invasive Species Information Center, United States National Agricultural Library. Lists general information and resources for Sea Squirt.
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