• Species: Hypogymnia farinacea Zopf
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• jahu-hallsamblik

• Species: Hypogymnia physodes (L.) Nyl.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik hallsamblik

• Species: Hypogymnia tubulosa (Schaer.) Hav.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• toru-hallsamblik

• Species: Hypogymnia vittata (Ach.) Parrique
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• ääris-hallsamblik

• Species: Icmadophila ericetorum (L.) Zahlbr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik rabasamblik

• Species: Illosporiopsis christiansenii (B.L. Brady & D. Hawksw.) D. Hawksw.
• Remark: earlier under Hobsonia christiansenii B.L. Brady & D. Hawksw.
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Illosporium carneum Fr.
• Remark: see: Pronectria robergei (= name of the teleomorph)
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Imshaugia aleurites (Ach.) S.L.F. Meyer
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• hall terasamblik

• Species: Intralichen christiansenii (D. Hawskw.) D. Hawksw. & M.S. Cole
• Remark: earlier under Bispora christiansenii D. Hawksw.
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Intralichen lichenum (Diederich) D. Hawksw. & M.S. Cole
• Remark: earlier under Bispora lichenum Diederich
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Ionaspis carnosula (Arnold) Arnold
• Remark: see: Hymenelia carnosula
• Fungus type: lichenized
• Treatment in Estonia: synonym

• Species: Ionaspis heteromorpha (Kremp.) Arnold
• Remark: see: Hymenelia heteromorpha
• Fungus type: lichenized
• Treatment in Estonia: synonym

• Species: Ionaspis rhodopis (Sommerf.) Blomb. & Forssell
• Remark: see: Hymenelia rhodopis
• Fungus type: lichenized
• Treatment in Estonia: synonym

• Species: Japewia subaurifera Muhr & Tønsberg
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Karsteniomyces peltigerae (P. Karst.) D. Hawksw.
• Remark: see: Scutula miliaris (Wallr.) Trevis.
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Karsteniomyces tuberculosus Alstrup & D. Hawksw.
• Remark: see: Scutula tuberculosa (Th. Fr.) Rehm
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Laeviomyces pertusariicola (Nyl.) D. Hawksw.
• Remark: see: Lichenodiplis pertusariicola
• Fungus type: lichenicolous
• Treatment in Estonia: synonym

• Species: Lasallia pustulata (L.) Mérat
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik põissamblik

• Species: Lecanactis abietina (Ach.) Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• kuuse-nublusamblik

• Species: Lecania cuprea (A. Massal.) Van den Boom & Coppins
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Lecania cyrtella (Ach.) Th. Fr.
• Remark: includes earlier misidentification of Lecanora sarcopidoides (A. Massal.) A.L. Sm.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Lecania cyrtellina (Nyl.) Sandst.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Lecania dubitans (Nyl.) A.L. Sm.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Lecania erysibe (Ach.) Mudd
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Lecania fuscella (Schaer.) A. Massal.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

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