The order Cyatheales, which includes the tree ferns, is a taxonomic division of the fern class, Polypodiopsida.

This is considered a form group, not a taxonomic division, and is used as a matter of convenience.

The discovery raises questions about the present taxonomic division of the species.

The taxonomic division is broadly based on antigenic and genetic characteristics, forming four major serotypes.

These fossils serve as a reminder that taxonomic divisions are human constructs that have been imposed in hindsight on a continuum of variation.

Together these four represent the traditional taxonomic divisions of paleontologic study.

Historically, it was the distinction between walking and swimming that formed the primary taxonomic division into the former suborders Natantia and Reptantia.

This subgenus was part of the earliest taxonomic division among the triggerplants (genus Stylidium).

Regardless, the strepsirrhine and haplorrhine clades are generally accepted and viewed as the preferred taxonomic division.

Callus tissue initiation has been described for many plant taxonomic divisions: