Adiantaceae (as construed here, sensu strictu, not a synonym of Pteridaceae) is a family of ferns in the order Pteridales. This includes the family formerly known as the "Vittariaceae." Recent genetic analyses based on chloroplast genes demonstrate that the vittarioid ferns cladistically nest within the genus Adiantum, making that genus paraphyletic. This family is most closely allied with the Pellaeaceae within the Pteridales.