Asia-Tropical: Philippines (Philippines present), India to Indochina present
India to Indochina; in Malesia: Philippines.
A small genus of somewhat uncertain position. After its foundation by Copeland (1905), several trilobed species have been variously in- and excluded. The two species that are at the moment still included have no evident relations to other genera of Polypodiaceae, but the possibility cannot be excluded that their joint inclusion in this genus is based on convergences.
Copel. - in Philipp. J. Sc. Bot. 1917: 311
Copel., Fern Fl. Philipp. 1960: 456
Hennipman et al. - in Kramer & Green, Fam. & Genera Vasc. Pl. 1. 1990: 217
Hennipman & Hetterscheid - in Bot. Jahrb. Syst. 1984: 3
Holttum - in Revis. Fl. Malaya. 1954: 210
Bower - in The Ferns. 1928: 213
Copel., Gen. Fil. 1947: 178