Studies of Neotropical tree pathogens in : a new species, , and new combinations for and .

The crinipelloid genera and (Agaricales, Marasmiaceae) are characterized by basidiomes that produce long, dextrinoid, hair-like elements on the pileus surface. Historically, most species are believed to be saprotrophic or, rarely, parasitic on plant hosts. The primary morphological diagnostic characters that separate and are pliant vs. stiff () stipes and a tendency toward production of reddish pigments (ranging from violet to orange) in the basidiome in . Additionally, most species of appear to have a biotrophic habit, while those of are predominantly saprotrophic. Recently, several new neotropical collections prompted a morphological and phylogenetic analysis of this group. Herein, we propose a new species and two new combinations: , described from Belize, is characterized by its larger pileus and narrower basidiospores relative to other related species; (= ) is recollected and redescribed from biotrophic collections from northern Argentina; and (= ), a parasite of . The addition of these three parasitic species into support a hypothesis of a primarily biotrophic/parasitic habit within this genus.