|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.
|H. W. Pfefferkorn 1976||combined and rephrased description from White and Nemejc. Previous authors: White (1899), Nemejc (1938), Cridland (1966), and Barthel (1968) were more concerned with the systematic position of Brittsia.|