|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Pteridopsida - Marattiaceae
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.
|H. W. Pfefferkorn 1976||Stem of tree fern (compression or impression); leaf scars in two vertical rows on opposite sides of the stem; leaf scars oval to rectangularly oval; trace of vascular bundle with stewartiopteroid or stipitopteroid configuration.|