Enigmatic Agaricales taxa

Melanoleuca is a poorly known genus of saprotrophic mushrooms traditionally classified in the family Tricholomataceae. DNA studies have determined that this genus is closely related to Amanita and Pluteus and that it does not belong to the family Tricholomataceae.

Infundibulicybe is a genus of fungi that is robustly placed incertae sedis as sister group to the Tricholomatoid clade. It has previously been part of the family of Tricholomataceae, but recent molecular phylogeny has shown it to take an isolated position within the Agaricales.

species of fungus

Plicatura is a fungal genus in the order Agaricales. It is incertae sedis with respect to familial placement within the order, although Kirk and colleagues (Dictionary of the Fungi, 10th edition, 2008) consider it likely aligned with either the Amylocorticiaceae or the Tricholomataceae. The genus, circumscribed by Charles Horton Peck in 1872, contains the single species Plicatura nivea (synonymous with Plicatura alni Peck 1872).

Gondwanagaricites (meaning "Gondwanan mushroom fossil") is an extinct monotypic genus of gilled fungus in the order Agaricales from the Early Cretaceous Crato Formation of Brazil. It contains the single species G. magnificus, and it is the oldest known mushroom fossil known to date.

Cercopemyces is a mushroom genus allied to Ripartitella and not clearly aligned with well characterized mushroom families. The genus contains four species, one known from western and another, previously known as Ripartitella ponderosa or Cystoderma ponderosa, from eastern North America, a third from Europe, and a fourth species from South America.