A striking brown species named in honour of the late New Zealand mycologist R.F.R. McNabb, who collected it twice near Auckland. The combination of a large brown, velutinous, concentrically cracked pileus, crowded cream-to-pink lamellae, and a palisadoderm pileipellis with brown pigment distinguishes it from other brown NZ Entoloma.

Note: These photos do not match the description well, the concentrically cracked or wrinkled of the pileus may only develop in old fruiting bodys.

Pileus: 25-65 mm diam., convex when young, soon becoming umbonate to campanulate, the umbonate centre often depressed. Margin frequently upturned and waved in age. Colour brown; surface dry, velutinous to scurfy or minutely squamulose, often concentrically cracked or wrinkled. Margin estriate. Not hygrophanous.
Lamellae: emarginate to subdecurrent with a short tooth, ventricose, crowded; cream becoming pink with age. Edges even, concolorous.
Stipe: 30-70 x 2.5-6 mm, cylindrical to subclavate at base, often equal. Concolorous with pileus or paler, with white villous base. Dry, fibrillose to glabrous, solid, solitary or in small groups.
Context: whitish, becoming brown beneath the pileus cuticle.
Odour/taste: not reported.