Parent taxon: Monocotyledones according to F. H. Knowlton 1926
See also Knowlton 1919, Mabberley 2000, McIver and Basinger 1993 and Ottone 2007
Sister taxa: Alismales, Alismatales, Arundo, Commelinacea, Commelinidae, Deccananthus, Doryanthites, Dracaenites, Festucophyllites, Florentinites, Glumiflorae, Graminales, Halocharis, Helobiae, Hypoglossidium, Isselia, Liliidae, Microrrhagion, Monocotylophyllum, Monocotylorhizos, Monocotylostrobus, Monoporites, Monosulcites, Najadales, Palmales, Palmoidopteris, Pandanites, Phylladelphia, Phyllotaenia, Podostachys, Principes, Ravenalospermum, Restioniidites, Sabalpollenites, Scitaminales, Scitamineae, Shuklanthus, Spathiflorae, Stellatopollis, Triloculaire, Triloculocarpon, Velamenorhizos, Viracarpon, Xyridales, Zingiberidae, Zosterites
Subtaxa: Lemnaceae
Ecology: "photoautotroph"
Distribution:
• Quaternary of Australia (14 collections), India (17), the United Kingdom (1), United States (1: Washington)
• Pliocene of Germany (5), the Russian Federation (1)
• Miocene of Germany (1), Poland (1), the Russian Federation (5)
• Oligocene of Germany (1)
• Eocene of India (1), United States (3: Wyoming)
• Paleocene of Canada (1: Alberta), United States (4: North Dakota)
• Tertiary of the Russian Federation (1)
• Cretaceous of Canada (1: Alberta), United States (4: North Dakota, South Dakota)
Total: 62 collections including 64 occurrences