Protosphagnum

{{Short description|Extinct genus of mosses}}

{{Speciesbox

| fossil_range = Permian

| image =

| image_caption =

| greatgrandparent_authority = Neuburg

| grandparent_authority = Ignatov

| genus = Protosphagnum

| parent_authority = Nejburg

| species = nervatum

| authority = Nejburg{{cite journal | last=Nejburg | first=M. F. | year=1960 | title=Leafy mosses from the Permian deposits of Angarida | journal=Trudy Geol. Inst. Leningr | volume=19 | pages=1–104 }}

}}

Protosphagnum nervatum is the only known species of order Protosphagnales. It is only known from the Permian fossil record. In many ways, it resembles the living moss genus Sphagnum, though its leaf cells are not as strongly dimorphic as in Sphagnum.{{cite book | last=Oostendorp | first=Cora | year=1987 | title=The Bryophytes of the Palaeozoic and the Mesozoic | series=Bryophytum Bibliotheca | volume=34 | isbn=3-443-62006-X }}