|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|A. E. González-Guzmán 1967||Pollen grain with long aperture extending across about 2/3 of greatest circumference. Tectum perforate. Sculpture type foveate to fossulate. Sometimes grains united in tetrads or larger irregular aggregates. External walls of such aggregates thicker than inner walls. Aperturoid area on inner face of grain present. Exine about 2-3 μ thick. Lumina of sculptural pattern about 2 μ.|