• Species: Biatoridium monasteriense J. Lahm ex Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• rohe-tilksamblik

• Species: Biatoropsis usnearum Räsänen
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Bilimbia lobulata (Sommerf.) Hafellner & Coppins
• Remark: earlier under Mycobilimbia lobulata (Sommerf.) Hafellner
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bilimbia microcarpa (Th. Fr.) Th. Fr.
• Remark: earlier under Mycobilimbia microcarpa (Th. Fr.) Lettau
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bilimbia sabuletorum (Schreb.) Arnold
• Remark: earlier under Bacidia sabuletorum (Schreb.) Lettau and Mycobilimbia sabuletorum (Schreb.) Hafellner
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Bispora christiansenii D. Hawksw.
• Remark: see: Intralichen christiansenii
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Bispora lichenum Diederich
• Remark: see: Intralichen lichenum
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Bryoria bicolor (Ehrh.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct
• kahevärviline narmassamblik

• Species: Bryoria capillaris (Ach.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• peen narmassamblik

• Species: Bryoria chalybeiformis (L.) Brodo & D. Hawksw.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• pundar-narmassamblik

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