• Species: Anaptychia runcinata (With.) J.R. Laundon
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• tõmmu ripssamblik

• Species: Anisomeridium biforme (Borrer) R.C. Harris
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Anisomeridium polypori (Ellis & Everh.) M.E. Barr
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Arctoparmelia centrifuga (L.) Hale
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• sõõr-põhjasamblik

• Species: Arctoparmelia incurva (Pers.) Hale
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• pais-põhjasamblik

• Species: Arthonia apatetica (A. Massal.) Th. Fr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Arthonia byssacea (Weigel) Almq.
• Remark: see: Inoderma byssaceum (Weigel) Gray
• Fungus type: lichenized
• Treatment in Estonia: synonym
• rant-tähnsamblik

• Species: Arthonia caerulescens (Almq.) R. Sant.
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Arthonia cinnabarina (DC.) Wallr.
• Remark: see: Coniocarpon cinnabarinum DC.
• Fungus type: lichenized
• Treatment in Estonia: synonym

• Species: Arthonia didyma Körb.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

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