Cordero’s Diplazium Fern was described in 1899; it is known only from the banks of the Río Peripa in the Santo Domingo de los Tsáchilas Province of Ecuador.

This sole known locality is nowadays totally altered by the Daule-Peripa dam and by the use of the land for the cultivation of bananas and cocoa, thus the species might well be extinct.

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However, there is also the possibility that this fern was in fact misidentified and that it is still around.

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edited: 09.08.2022