What is "naiadolina"

Naiadolina is an agaric fungal genus that produces striking, yellowish fruit bodies on sedges ( Scirpus and Dulichium) in wetlands in eastern Canada. The lamellae are merulioid, forked and anastomosing. The type species was previously classified as a Marasmius in the Marasmiaceae, but phylogenetically, Naiadolina flavomerulina is in the Physalacriaceae sister to the genus Cryptomarasmius.