Asia-Tropical: Borneo present; Malaya present; Philippines (Philippines present); Sumatera (Sumatera present), Mindanao present
Malesia: Malaya, Sumatra, Borneo, Philippines (Mindanao).
Though the type of D. elmerorum is small, other specimens from Mindanao have pinnae to 15x3 cm. No small fertile fronds have been found on plants in Sumatra and Malaya. Some specimens have very few glands on the lower surface of costules. Specimens from Sumatra and Malaya have appressed hairs between the veins on the upper surface, specimens from Borneo and Mindanao have shorter suberect hairs.