Review of phlegmacioid Cortinariaceae (Agaricales) in New Zealand

We review the diversity of phlegmacioid (Cortinariaceae) taxa in New Zealand as well as in other parts of the Southern Hemisphere. Using a 4-locus molecular phylogeny, it is shown that these taxa are represented in six of the ten recently recognised genera of Cortinariaceae. These are discussed, their taxonomy is analysed, and a key is provided. Eight new species (Mystinarius badiohepaticus, Phlegmacium medburyensis, Ph. tinelineicus, Thaxterogaster artosinus, Th. artosoides, Th. porcellanoides, Th. pseudoaustralis, Th. subdulciorum) and two new sections (Phlegmacium sect. Rufoaurantia, Thaxterogaster sect. Artosoides) are proposed.

Automated summary

This paper reviews the diversity of phlegmacioid taxa in New Zealand and other parts of the Southern Hemisphere. Using molecular phylogeny, it is found that these taxa are represented in six out of the ten recognized genera of Cortinariaceae. The paper proposes eight new species and two new sections.