Synonyms: Camarophyllus fornicatus (homotypic); Camarophyllus fornicatus var. clivalis; Camarophyllus streptopus; Dermolomopsis fornicata; Hygrocybe clivalis (heterotypic); Hygrocybe fornicata (homotypic); Hygrocybe fornicata var. clivalis; Hygrocybe fornicata var. streptopus; Hygrocybe streptopus (heterotypic); Hygrophorus clivalis; Hygrophorus clivalis var. streptopus; Hygrophorus fornicatus (homotypic); Hygrophorus fornicatus var. clivalis; Hygrophorus fornicatus var. streptopus; Hygrophorus streptopus (heterotypic); Neohygrocybe fornicata (homotypic); Neohygrocybe fornicata var. streptopus; Porpoloma fornicata (homotypic); Porpolomopsis fornicata (homotypic)