Two new species of Laboulbeniales occurring on beetles from Spain are descr
ibed: Ceratomyces pyrenaeus parasitic on Hydrabius fuscipes (Coleoptera Hyd
rophilidae Hydrophilinae), and Rhynchophoromyces helophori parasitic on Hel
ophorus spp.(Coleoptera Hydrophilidae Helophorinae). The following six spec
ies are new records for Spain: Autoicomyces crassus, Diplomyces clavifer, H
ydrophilomyces coneglianensis, Laboulbenia asperata, Peyritschiella subinae
quilatera and Rhachomyces tenenbaumii. Eusynaptomyces enochri is new for Po
rtugal. Laboulbenia asperata is a new European record and its dioecious nat
ure is described.