• Species: Tremella hypogymniae Diederich & M.S. Christ.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Tremella lichenicola Diederich
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Tremella phaeophysciae Diederich & M.S. Christ.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Tremella ramalinae Diederich
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Tremolecia atrata (Ach.) Hertel
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Trichonectria anisospora (Lowen) Van den Boom & Diederich
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Trichonectria hirta (Bloxam) Petch
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Tuckermannopsis chlorophylla (Willd.) Hale
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• ääris-oksasamblik

• Species: Umbilicaria cinerascens (Arnold) Frey
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• tuhk-kõrvsamblik

• Species: Umbilicaria cylindrica (L.) Delise ex Duby
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• rips-kõrvsamblik

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