Didemnum

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Didemnum
Didemnum.jpg
Tunicate colonies of Didemnum
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Subphylum: Tunicata
Class: Ascidiacea
Order: Aplousobranchia
Family: Didemnidae
Genus: Didemnum
Savigny, 1816

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 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[]

  • (Verrill, 1871)
  • (Van Name, 1902)
  • (Milne-Edwards, 1841)
  • (Sluiter, 1906)
  • (Savigny, 1816)
  • (Ritter and Forsyth, 1917)
  • (Arnbaeck, 1929)
  • (Von Drasche, 1883)
  • (Milne-Edwards, 1841)
  • (Lotufo and Dias, 2007
  • (Hartmeyer, 1909)
  • (Milne-Edwards, 1841)
  • Didemnum molle (Herdmann, 1886)
  • (Monniot, 1983)
  • Didemnum proliferum (Kott, 1981)
  • (Van Name, 1945)
  • (Hartmeyer, 1911)
  • (Herdmann, 1886)
  • (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[]

  1. ^ 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. ^ Kott, Patricia (15 Aug 2001). "The AUSTRALIAN ASC1DIACEA PART 4, APLOUSOBRANCHIA (3), DIDEMNIDAE". Memoirs of the Queensland Museum. 47.
  3. ^ a b "Marine Nuisance Species". Woods Hole Coastal and Marine Center. 17 February 2016.
  4. ^ 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. doi:10.1016/j.jembe.2006.10.021.
  5. ^ 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. ^ Ruppert, Edward E.; Richard S. Fox; Robert D. Barnes (2004). Invertebrate Zoology: A Functional Evolutionary Approach (7th ed.). Delhi, India. ISBN 8131501043. OCLC 970002268.
  • (USGS) National Geologic Studies of Benthic Habitats, Northeastern United States has a Marine Nuisance Species page dedicated to this genus
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