Here is the reference: De Gasper, A. L., De Oliveira Dittrich, V. A., Smith, A. R. & Salino, A. (2016). A classification for Blechnaceae (Polypodiales: Polypodiopsida): New genera, resurrected names, and combinations. Phytotaxa 275 (3): 191 - 227.
I know it at this site; I have submitted a record from here. The fertile fronds and the auriculate base of the fronds differentiate it, as does habitat to some extent.