Posidonia

For other uses, see Posidonia (disambiguation).

Posidonia
Temporal range: Maastrichtian - recent[1]
Posidonia oceanica
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Posidoniaceae
Hutch.[2]
Genus: Posidonia
K.D.Koenig
Type species
Posidonia oceanica
Species

See text

Posidonia distribution range

Posidonia is a genus of flowering plants. It contains nine species of marine plants[3] ("seagrass"), found in the seas of the Mediterranean and around the south coast of Australia.

The APG system (1998) and APG II system (2003) accept this genus as constituting the sole genus in the family Posidoniaceae, which it places in the order Alismatales, in the clade monocots. The AP-Website[4] concludes that the three families Cymodoceaceae, Posidoniaceae and Ruppiaceae form a monophyletic group. Earlier systems classified this genus in the family Potamogetonaceae or in the family Posidoniaceae but belonging to order Zosterales.

Posidonia oceanica has nitrogen fixation capabilities via symbiosis and other species may as well.[5]

  1. ^ Aires, T; Marbà, N; Cunha, RL; Kendrick, GA; Walker, DI; Serrão, EA; Duarte, CM; Arnaud-Haond, S (2011-01-17). "Evolutionary history of the seagrass genus Posidonia". Marine Ecology Progress Series. 421. Inter-Research Science Center: 117–130. Bibcode:2011MEPS..421..117A. doi:10.3354/meps08879. ISSN 0171-8630.
  2. ^ Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. hdl:10654/18083.
  3. ^ Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3). Magnolia Press: 201–217. doi:10.11646/phytotaxa.261.3.1.
  4. ^ AP-Website
  5. ^ Mohr, Wiebke (3 November 2021). "Terrestrial-type nitrogen-fixing symbiosis between seagrass and a marine bacterium". Nature. 600 (7887): 105–109. Bibcode:2021Natur.600..105M. doi:10.1038/s41586-021-04063-4. PMC 8636270. PMID 34732889.