The order used to be defined broadly to include the Rhizogoniales, but is now used in a narrower sense.[3] A species of the Mniaceae genus Rhizomnium, Rhizomnium dentatum, was described from fossil gametophytes preserved in Baltic amber.[4]
^Buck, William R. & Bernard Goffinet. 2000. "Morphology and classification of mosses", pages 71-123 in A. Jonathan Shaw & Bernard Goffinet (Eds.), Bryophyte Biology. (Cambridge: Cambridge University Press). ISBN0-521-66097-1.
^Heinrichs, J; Hedenäs, L; Schäfer-Verwimp, A; Feldberg, K; Schmidt, AR (2014). "An in situ preserved moss community in Eocene Baltic amber". Review of Palaeobotany and Palynology. 210: 113–118. doi:10.1016/j.revpalbo.2014.08.005.