Fruiting body a stalked sporangium, minute (usually <0.5 mm tall). Sporotheca globose, small (usually <50 µm in diameter). Stalk tapering from base to apex, translucent or pallid. Hypothallus inconspicuous. Peridium completely fugacious or partly remaining in the form of a basal collar. Columella present or absent, but usually extremely short when present. Capillitium present or absent, but when present originating at the apex of the columella and ranging from a single, sparingly branched filament to a well-developed network. Spores globose or subglobose, hyaline or white to yellow, pink or pale brown, the spore wall sometimes with thicken areas.