Diplaziopsidaceae is a family of ferns in the order Polypodiales. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family is placed in the suborder Aspleniineae, and includes two genera.[2] Alternatively, it may be treated as the subfamily Diplaziopsidoideae of a very broadly defined family Aspleniaceae.[1]
They are described as medium-to-large ferns, which grow near streams in forested areas. Their rhizomes are thick and decumbent to erect.[3] Species are found in east Asia, from China south to New Guinea and east into the Pacific.[4]
The following cladogram for the suborder Aspleniineae (as eupolypods II), based on Lehtonen, 2011,[5] and Rothfels & al., 2012,[7] shows a likely phylogenetic relationship between the Diplaziopsidaceae and the other families of the clade.