New records of little-known species of Carbomyces (Carbomycetaceae, Ascomycota)

The genus Carbomyces is reported for the first time for the Mexican mycobiota. Carbomyces emergens, C. gilbertsonii, and C. longii were collected in the Chihuahuan desert, Mexico. Carbomyces emergens was more frequently collected and more widely distributed, while C. gilbertsonii and C. longii each have a restricted distribution and represent second records worldwide. The phenology, chorology, and macro-/microscopic characters (including spore ornamentation by SEM) are outlined for all species.