Sphagnopsida is a class of mosses that includes a single subclass Sphagnidae, with two orders.

It is estimated it originated about 465 million years ago, along with Takakia.

[1] The order Sphagnales contains four living genera: Ambuchanania, Eosphagnum, and Flatbergium, which counts four species in total, and Sphagnum which contains the rest of the species.

The extinct Protosphagnales contains a single fossil species.

Takakiopsida Sphagnopsida Andreaeopsida Andreaeobryopsida Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida