Montsechia is an extinct genus of aquatic plants containing the species Montsechia vidalii, described from Spain. M. vidalii lived about 130 million years ago, during the Barremian age, and appears to be the earliest known flowering plantmacrofossil.[1][2] It has affinities with the modern genus Ceratophyllum.[3] It has been placed in the ceratophyllalean family Montsechiaceae.[4]
^Gomez, Bernard; Daviero-Gomez, Véronique; Coiffard, Clément; Barral, Abel; Martín-Closas, Carles & Dilcher, David L. (2020). "Montsechia vidalii from the Barremian of Spain, the earliest known submerged aquatic angiosperm, and its systematic relationship to Ceratophyllum". Taxon. 69 (6): 1273–1292. doi:10.1002/tax.12409.
