Kingdom Plantae Family Posidoniaceae
Hutch. Higher classification Posidoniaceae | Order Alismatales Scientific name Posidonia Rank Genus | |
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Lower classifications Posidonia oceanica, Posidonia australis, Posidonia coriacea, Posidonia ostenfeldii | ||
Posidonia oceanica meadows an underwater treasure
Posidonia is a genus of flowering plants. It contains nine species of marine plants ("seagrass"), found in the seas of the Mediterranean and around the south coast of Australia.
Contents
- Posidonia oceanica meadows an underwater treasure
- Global ocean tv episode 45 posidonia oceanica ibiza
- Species
- References
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 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.
Global ocean tv episode 45 posidonia oceanica ibiza
Species
This is a list of species that are contained by the genus:
The species described by Linnaeus, Posidonia oceanica, is found in the Mediterranean; the rest are located around the southern coast of Australia. Some species are endemic seagrasses of Western Australia, all the Australian species are found in that region's diverse habitats. This arrangement was divided into two complexes: the Posidonia australis and Posidonia ostenfeldii groups. Some species descriptions may only be regional characteristics, and may need further revision.
In 2006 a huge clonal colony of P. oceanica was discovered south of the island of Ibiza. At 8 km across and possibly up to 100,000 years of age, it may be one of the largest and oldest clonal colonies on Earth.