Abstract

Thirteen representatives of Myxariaceae sensu Jülich: Heterochaetella brachyspora (Bourdot & Galzin) Luck-Allen, Myxarium atratum (Peck) Ginns & Lefebvre, M. granulum Hauers!., M. laccatum (Bourdot & Galzin) Reid, M. mesomorphum (Bourdot & Galzin) Haurs!., M. mesonucleatum Kisim., Oberw. & L.D. Gómez /lOV. sp., M. subsphaerosporum Kisim., Oberw. & L.D. Gómez nov. sp., Protodontia subgelati/losa (Karst.) Pilát; Pseudohydum gelatinosum (Fr.) P. Karst, P.gelatinosum var. paucidelllata Lowy; one species of Sebacinaceae, Efibulobasidium albescens (Sacc. & Malbr.) K. Wells; and the Tremellodrendropsidaceae Tremellodendropsisflagellifonnis (Berk.) Crawford var.ovalispora Crawford, are reported or described from Costa Rica. The corticioid Cystidiodontia artocreas (Berk & Curto ex Cooke) Hjortstam is also reported from Costa Rica.