Didemnum

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Didemnum is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family.[1][2] Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. Some Didemnum species, including Didemnum vexillum and Didemnum perlucidem are considered invasive species.[3] In early 2006, Didemnum vexillum was found covering a 230 km2 area of cobble habitat in Georges Bank off the coast of New England,[4] and is classified as an invasive species of greatest concern in coastal areas throughout Europe,[5] New Zealand, and North America.[3] Didemnum sp. invasions have also been recorded in Canada, the Mediterranean, and the Netherlands.[6]

Species in this genus can be found in tropical or temperate regions. Some tropical species such as Didemnum molle have photosynthetic algae in their tunics.[7]

Species

The following species are recognised in the genus Didemnum:[8]

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File:Didemnum overgrowing dark green algae.jpg
Tunicate colonies of Didemnum sp. overgrowing the fronds of dark green algae. These colonies can quickly overgrow most surfaces and other organisms.

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Moreno, T.; Rocha, R. (June 2008). "Phylogeny of the Aplousobranchia (Tunicata: Ascidiacea)". Revista Brasileira de Zoologia. 25 (2): 269–298. doi:10.1590/S0101-81752008000200016.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Kott, Patricia (15 Aug 2001). "The AUSTRALIAN ASC1DIACEA PART 4, APLOUSOBRANCHIA (3), DIDEMNIDAE". Memoirs of the Queensland Museum. 47.
  3. ^ a b Page Module:Citation/CS1/styles.css has no content."Marine Nuisance Species". Woods Hole Coastal and Marine Center. 17 February 2016.
  4. ^ Page Module:Citation/CS1/styles.css has no content.Valentine, Page C.; Carman, Mary R.; Blackwood, Dann S.; Heffron, Erin J. (2007). "Ecological observations on the colonial ascidian Didemnum sp. in a New England tide pool habitat". Journal of Experimental Marine Biology and Ecology. 342 (1): 109–121. Bibcode:2007JEMBE.342..109V. doi:10.1016/j.jembe.2006.10.021.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Ian Laing; James Bussell; Kate Somerwill. "Project report: Assessment of the impacts of Didemnum vexillum and options for the management of the species in England".
  6. ^ "Invasion der Pfankuchen" Der Spiegel, 1/2006, p. 102
  7. ^ Page Module:Citation/CS1/styles.css has no content.Ruppert, Edward E.; Richard S. Fox; Robert D. Barnes (2004). Invertebrate Zoology: A Functional Evolutionary Approach (7th ed.). Delhi, India. ISBN 8131501043. OCLC 970002268.{{cite book}}: CS1 maint: location missing publisher (link)
  8. ^ Page Module:Citation/CS1/styles.css has no content."WoRMS - World Register of Marine Species - Didemnum Savigny, 1816". www.marinespecies.org. Retrieved 2022-08-17.
  • (USGS) National Geologic Studies of Benthic Habitats, Northeastern United States has a Marine Nuisance Species page dedicated to this genus

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