Comments. This is a robust species with a violaceous tint in lamellae and context and a copious, yellowish veil. It recalls Cortinarius xenosma Soop and Cortinarius cupreonatus Soop, but is generally larger with larger spores. Available molecular data place C. trichocarpus near the Rozites-like Cortinarius wallacei Soop. Moreover, the species may be regarded as an agaricoid form of a morphospecies that includes the secotioid Cortinarius ohauensis (Soop) Peintner & M. Moser, since their sequences (ITS + LSU) deviate by only four nuclear substitutions. The species has not been recorded again in New Zealand, but it was deemed worth publishing it in this study in view of its importance for the taxonomy of the genus.