• Species: Clauzadea metzleri (Körb.) Clauzade & Cl. Roux ex D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Clauzadea monticola (Schaer.) Hafellner & Bellem.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Cliostomum corrugatum (Ach.) Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• hele ketassamblik

• Species: Cliostomum flavidulum Hafellner & Kalb
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Cliostomum griffithii (Sm.) Coppins
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Cliostomum leprosum (Räsänen) Holien & Tønsberg
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Clypeococcum cetrariae Hafellner
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Clypeococcum hypocenomycis D. Hawksw.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Collema auriforme (With.) Coppins & J.R. Laundon
• Remark: see: Lathagrium auriforme
• Fungus type: lichenized
• Treatment in Estonia: synonym
• kõrv-limasamblik

• Species: Collema bachmanianum (Fink) Degel.
• Remark: see: Enchylium bachmanianum
• Fungus type: lichenized
• Treatment in Estonia: synonym
• Bachmani limasamblik

• Species:
• Remark:
• Fungus type:
• Treatment in Estonia: