Lichenized and non-lichenized calicioid fungi from North America

taxonomy, distribution, and ecology of nineteen species in Jive calicioid genera from the United States and Canada are described, and keys are presented to the North American species of Chaenotheca, Chaenothecopsis, Phaeocalicium, Sclerophora, and Stenocybe. Chaenothecopsis edbergii Selva & Tibell, C. exilis Tibell, Phaeocalicium matthewsianum Selva & Tibell, and Stenocybe flexuosa Selva & Tibell are described as new. The new combination Phaeocalicium minutissimum (Merrill) Selva is proposed, with the selection of a neotype. Chaenotheca hygrophila, C. servitii, C. sphaerocephala, Chaenothecopsis asperopoda, C. haematopus, C. irregularis, C. ochroleuca, C. tasmanica, Phaeocalicium betulinum, and P. flabelliforme are reported as new to the North American mycota.