Lignosus dimiticus is a species of poroid fungus in the family Polyporaceae found in Zaire.

Its fruit body features a funnel-shaped cap up to 10 cm (3.9 in) in diameter and 15 mm (0.6 in) in the centre.

The smooth, white stipe has a woody texture, and measures 8 cm (3.1 in) long and 12–20 mm (0.5–0.8 in) thick.

Unlike other members of Lignosus, L. dimiticus has a dimitic hyphal system, as it lacks binding hyphae in its trama and context.

This Polyporales-related article is a stub.