Canopy tree. Leaves thinly chartaceous or membranous, lateral nerves 15-20 pairs, ± raised below. Fruits ellipsoid or subglobose, 3-4 cm diameter, hairs mealy or scurfy, 0.2-0.4 mm, partly glabrescent;
Asia-Tropical, Louisiade Archipelago present, Misima I present, Papua New Guinea present, Rossel I present
Malesia: Papua New Guinea: Louisiade Archipelago (Misima I., type, and Rossel I., Brass 28528).
In the description of M. tenuivenia Sinclair (I.e.: 329) suggested a relationship to M. archboldiana, M. pedicellata, and M. smythiesii (from Borneo) on account of the cinnamon or rusty scale-like hairs on the lower leaf surface, but possibly there only is a remote affinity with M. pedicellata.