Plagiotheciaceae

{{Short description|Family of mosses}}

{{Automatic taxobox

| image = Plagiothecium undulatum 2006.01.08 14.21.27-p1080043.jpg

| image_caption = Plagiothecium undulatum

| taxon = Plagiotheciaceae

| authority = Fleischer and Broth.

| subdivision_ranks = Genera

| subdivision = See text

}}

Plagiotheciaceae is a family of mosses from the order Hypnales. It is found almost nearly worldwide,{{cite web|url=https://www.gbif.org/species/8752 |website=gbif.org |title=Plagiotheciaceae |publisher=Moss TROPICOS Database |access-date=29 June 2022}} including Antarctica. Located primarily in temperate latitudes and at higher elevations in the tropics.{{cite web |title=Plagiotheciaceae - FNA |url=http://beta.floranorthamerica.org/Plagiotheciaceae |website=beta.floranorthamerica.org |access-date=29 June 2022}}

Named after Plagiothecium, which has over 150 species.

It originally had 2 subfamilies, Plagiothecioideae (which contained Catagonium and Plagiothecium), and Stereophylloideae (which contained Entodontopsis, Pilosium, Stenocarpidopsis, Stenocarpidium and Sterephyllum).{{cite journal |last1=Pedersen |first1=Niklas |last2=Hedenäs |first2=Lars |title=Phylogeny of the Plagiotheciaceae Based on Molecular and Morphological Evidence |journal=The Bryologist |date=Autumn 2002 |volume=105 |issue=3 |pages=310–324}}