• Species: Candelariella kuusamoënsis Räsänen
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Candelariella reflexa (Nyl.) Lettau
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Candelariella superdistans (Nyl.) Malme
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Candelariella vitellina (Hoffm.) Müll. Arg.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Candelariella xanthostigma (Ach.) Lettau
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• tera-sädesamblik

• Species: Capronia peltigerae (Fuckel) D. Hawksw.
• Remark: see: Knufia peltigerae (Fuckel) Réblová & Unter.
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Carbonea vitellinaria (Nyl.) Hertel
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Catapyrenium cinereum (Pers.) Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• hall rähksamblik

• Species: Catapyrenium pilosellum Breuss
• Remark: see: Placidium pilosellum
• Fungus type: lichenized
• Treatment in Estonia: synonym
• karvane rähksamblik

• Species: Catapyrenium rufescens (Ach.) Breuss
• Remark: see: Placidium rufescens
• Fungus type: lichenized
• Treatment in Estonia: synonym extinct
• pruunikas rähksamblik

• Species: Catapyrenium squamulosum (Ach.) Breuss
• Remark: see: Placidium squamulosum
• Fungus type: lichenized
• Treatment in Estonia: synonym
• soomus-rähksamblik

• Species: Catillaria aphana (Nyl.) Coppins
• Remark: includes earlier misidentification of Catillaria cryptophila Th. Fr. & Almq.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Catillaria chalybeia (Borrer) A. Massal.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Catillaria cryptophila Th. Fr. & Almq.
• Remark: excluded as misidentification: re-identified as Catillaria aphana
• Fungus type: lichenized
• Treatment in Estonia: misidentification

• Species: Catillaria lenticularis (Ach.) Th. Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Catillaria minuta (A. Massal.) Lettau
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Catillaria nigroclavata (Nyl.) Schuler
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Catinaria atropurpurea (Schaer.) Vězda & Poelt
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Cecidonia umbonella (Nyl.) Triebel & Rambold
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Cercidospora epipolytropa (Mudd) Arnold
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Cercidospora macrospora (Uloth) Hafellner & Nav.-Ros.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Cetraria aculeata (Schreb.) Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sarv-käosamblik

• Species: Cetraria ericetorum Opiz
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kitsas käosamblik

• Species: Cetraria islandica ssp. crispiformis (Räsänen) Kärnefelt
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Cetraria islandica (L.) Ach. ssp. islandica
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• islandi käosamblik

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