|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 stephanocolpate, oblate-suboblate; furrow C α 1, C β 1b-3, C γ 1-2; sculpture type psilate, but verrucate in narrow zone along colpi. Thickness of exine about 4 μ; ectexine thicker than endexine. The tectate pollen grain with equatorial thickening resembling an equatorial costa.|