basidial

It has distinct microscopic characteristics, such as a wider range of basidial widths (20-40 m), and a lack of pleurocystidia.

The spores are generally separated from the basidia when the latter collapse and gelatinize; this basidial breakdown typically occurs simultaneously with a gelatinization of cells lining the inside wall of the peridiole.

Tulasnellaceae have self-replicating spores and grossly swollen sterigmata that are separated from the basidium with a septum at the base, however the basidial body itself is not septate and the sterigmata and the basidium are quite regularly shaped.

Sanmee and colleagues mention that the eastern North American species A. frostiana resembles A. rubrovoltata slightly, but the former has short grooves at the edge of a yellowish-orange cap, slightly larger spores, a yellow volva, and clamps at the basidial bases.