Leptodictyum (W. P. Schimper) Warnstorf, 1906.

Leptodictyum is an aquatic or semiaquatic pleurocarp with small and quadrate alar cells, with lanceolate leaves whose margins are plane and entire or nearly so. The costa of Leptodictyum ends many cells before the leaf apex, and the median laminal cells may be rather short prosenchymatous. Basically, Leptodictyum has the areolation of an Amblystegium, but the latter is a smaller plant often of mesic sites. Leptodictyum differs from the aquatic Hygroamblystegium in that the species in the latter genus have very broad costae.
see Keys to Amblystegium, Drepanocladus Etc.

Species included:
Leptodictyum humile (Palisot de Beauvois) Ochyra
Leptodictyum riparium (Hedwig) Warnstorf