- References
{{italic title}}{{Taxobox
| name = Loefgrenia
| regnum = Bacteria
| phylum = Cyanobacteria
| ordo = Nostocales
| familia = Hapalosiphonaceae
| genus = Loefgrenia
| genus_authority = Gomont in Wittrock et al., 1896
}}Loefgrenia is a monospecific, freshwater, epiphytic genus of nonheterocystic cyanobacteria known from Brazil. The type and only known species for the genus is Loefgrenia anomala Gomont. References{{AlgaeBase genus|name=Loefgrenia|id=43584}}{{Taxonbar|from=Q6666541}}{{cyanobacteria-stub}} 3 : Nostocales|Cyanobacteria genera|Monotypic bacteria genera |