• Species: Solorina spongiosa (Ach.) Anzi
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• käsnjas lohksamblik

• Species: Sphaerellothecium araneosum (Rehm ex Arnold) Zopf
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Sphaerellothecium araneosum var. cladoniae Alstrup & Zhurb.
• Remark: see: Sphaerellothecium cladoniae
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Sphaerellothecium propinquellum (Nyl.) Cl. Roux & Triebel
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Sphaerophorus globosus (Huds.) Vain.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kerajas korallsamblik

• Species: Sphinctrina turbinata (Pers.) De Not.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Squamarina lentigera (Weber) Poelt
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• valge vahasamblik

• Species: Staurothele caesia (Arnold) Arnold
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Staurothele fissa (Taylor) Zwackh
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain extinct

• Species: Staurothele frustulenta Vain.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Steinia geophana (Nyl.) Stein
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Stenocybe pullatula (Ach.) Stein
• Remark:
• Fungus type: saprotrophic
• Treatment in Estonia: certain

• Species: Stereocaulon alpinum var. gracilentum (Th. Fr.) H. Magn.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sale tinasamblik

• Species: Stereocaulon condensatum Hoffm.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• pisi-tinasamblik

• Species: Stereocaulon dactylophyllum Flörke
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sõrm-tinasamblik

• Species: Stereocaulon evolutum Graewe ex Th. Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain extinct
• rull-tinasamblik

• Species: Stereocaulon glareosum (Savicz) H. Magn.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kruusa-tinasamblik

• Species: Stereocaulon incrustatum Flörke
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kribu-tinasamblik

• Species: Stereocaulon paschale (L.) Hoffm.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• nõmm-tinasamblik

• Species: Stereocaulon saxatile H. Magn.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kivi-tinasamblik

• Species: Stereocaulon subcoralloides (Nyl.) Nyl.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• korall-tinasamblik

• Species: Stereocaulon tomentosum Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• vilt-tinasamblik

• Species: Stereocaulon vesuvianum Pers.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain extinct
• paljas tinasamblik

• Species: Stigmidium cladoniicola Zhurb. & Diederich
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Stigmidium congestum (Körb.) Triebel
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

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