Family Posidoniaceae Hutchinson 1895

Liliopsida - Alismatales - Alismatidae

Alternative spelling: Posidonioideae

Parent taxon: Alismatales according to D.J. Mabberley 2000

See also den Hartog 1970

Sister taxa: Alismataceae, Aponogetonaceae, Butomaceae, Cymodoceaceae, Juncaginaceae, Najadaceae, Pennipollis, Ruppiaceae, Scheuchzeriaceae, Zannichelliaceae, Zosteraceae

Subtaxa: Posidocea Posidonia

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Distribution:

• Pliocene of Greece (1 collection)

• Oligocene of the United Kingdom (1)

• Eocene of Belgium (9), France (2), Germany (1), Italy (2), Ukraine (1), the United Kingdom (2)

• Paleocene of Belgium (1)

• Cretaceous of Germany (1)

Total: 21 collections each including a single occurrence

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