Solitary, body globular, to 6 cm wide. Tubercles obscure, conical. Axils bare. Central spines 4-8, 7-9 mm long, reddish-brown to black, lower spine longer, 12 mm, and hooked. Radial spines 30, to 8 mm long, white, needle-like. Flowers pink to purple, 1 cm wide. Fruit white to pink.
Possibly synonymous with M. mercadensis Patoni.
Source: (1997). Cactaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.