Asia-Tropical: Philippines (Philippines present), Luzon present, Mindanao present, N. Moluccas present, Talaud Is present
Malesia: Philippines (Luzon to Mindanao) and N. Moluccas (Talaud Is.).
As reported by Christ (1907) Copeland at first distinguished D. foxii by its small fronds, much-reduced basal pinnae and almost medial sori, but in all these characters there is no sharp distinction (and the largest fronds in herbaria usually lack the base, so that smaller basal pinnae might have been present). I suggest that the distinction is one of habitat (as with stream-bank forms of Pronephrium menisciicar- pon). Middle pinnae of large fronds are similar in aspect to those of Amphineuron immersum (Bl.) Holttum, but differ from the latter in very oblique widely-spaced lobes, in venation and in glandular hairs.