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. 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.

class Sphagnopsida order Protosphagnales † order Sphagnales family Ambuchananiaceae family Flatbergiaceae family SphagnaceaeTakakiopsida Sphagnopsida Andreaeopsida Andreaeobryopsida Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida
Takakiopsida Sphagnopsida Andreaeopsida Andreaeobryopsida Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida
Takakiopsida
Sphagnopsida
Andreaeopsida Andreaeobryopsida Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida
Andreaeopsida Andreaeobryopsida Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida
Andreaeopsida
Andreaeobryopsida
Oedipodiopsida Tetraphidopsida Polytrichopsida Bryopsida
Oedipodiopsida
Tetraphidopsida Polytrichopsida Bryopsida
Tetraphidopsida
Polytrichopsida
Bryopsida
The phylogenetic position of the Sphagnopsida among the eight classes of mosses, based on inferences from DNA sequence data.
  • Shaw, A. Jonathan (2000). . The Bryologist. 103 (2): 277–306.