Sphaerostephanos mutabilis ContentDistribution Notes Citation Distribution Asia-Tropical: New Guinea present, Idenburg River presentMalesia: New Guinea. Known only from type and Brass 13047 from Idenburg River. Notes This is near S. aquatilis (no. 44), differing in narrower pinnae, veins free, and lower surface quite glabrous; the two should perhaps be united. Citation Copel. 1951 – In: Philip. J. Sci.: 443