Liliopsida - Alismatales - Alismatidae
Alternative spelling: Najadeae
Parent taxon: Alismatales according to D.J. Mabberley 2000
See also Daghlian 1981, Hosius and Von der Marck 1880 and Shoshani et al. 1989
Sister taxa: Alismataceae, Aponogetonaceae, Butomaceae, Cymodoceaceae, Juncaginaceae, Pennipollis, Posidoniaceae, Ruppiaceae, Scheuchzeriaceae, Zannichelliaceae, Zosteraceae
Subtaxa: Potamogeton
Distribution:
• Quaternary of Australia (11 collections), Canada (2: Ontario), the United Kingdom (3), United States (3: North Carolina, Virginia, Washington)
• Pliocene of Germany (9), Italy (1), the Russian Federation (1)
• Hemphillian of United States (1: Indiana)
• Miocene to Pliocene of France (1), Germany (1)
• Miocene of Canada (1: Northwest Territories), Denmark (1), Germany (23), Japan (6), Poland (1), the Russian Federation (17), Turkey (1), United States (1: Idaho)
• Oligocene to Miocene of Germany (1)
• Oligocene of Germany (3), the Russian Federation (11), the United Kingdom (1), United States (1: Oregon)
• Eocene to Oligocene of United States (2: Colorado)
• Eocene of the United Kingdom (6), United States (4: Colorado, Wyoming)
• Tertiary of Japan (2)
• Cretaceous of China (1)
Total: 116 collections including 209 occurrences