Antrodiella was traditionally placed in the family Phanerochaetaceae until molecular studies were used to determine a more appropriate classification in the Steccherinaceae.

[2][3] The genus is a wastebasket taxon, containing "species that share common macroscopic and microscopic characteristics, but are not necessarily related".

If it is present, the cap is narrow and light-coloured, smooth to scrupose (rough with very small hard points).

[1] Antrodiella has a dimitic hyphal system, containing both generative and skeletal hyphae.

Antrodiella spores are small, rarely measuring above 5 μm in their longest dimension, and have a shape that is almost spherical, ellipsoid, or allantoid (sausage-shaped).