• Species: Porpidia speirea (Ach.) Kremp.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Porpidia tuberculosa (Sm.) Hertel & Knoph
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Pronectria erythrinella (Nyl.) Lowen
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Pronectria leptaleae (J. Steiner) Lowen
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Pronectria robergei (Mont. & Desm.) Lowen
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Pronectria xanthoriae Lowen & Diederich
• Remark:
• Fungus type: lichenicolous
• Treatment in Estonia: certain

• Species: Protoblastenia calva (Dicks.) Zahlbr.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protoblastenia incrustans (DC.) J. Steiner
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protoblastenia rupestris (Scop.) J. Steiner
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protopannaria pezizoides (Weber) P.M. Jørg. & S. Ekman
• Remark: earlier under Pannaria pezizoides (Weber) Trevis.
• Fungus type: lichenized
• Treatment in Estonia: certain
• harilik sinisamblik

• Species: Protoparmelia atriseda (Fr.) R. Sant. & V. Wirth
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protoparmelia badia (Hoffm.) Hafellner
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protoparmelia picea auct.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct

• Species: Protoparmeliopsis achariana (A.L. Sm.) Moberg & R. Sant.
• Remark: earlier under Lecanora achariana A.L. Sm.
• Fungus type: lichenized
• Treatment in Estonia: certain
• Achariuse sõõrsamblik (endine Achariuse liudsamblik)

• Species: Protoparmeliopsis macrocyclos (H. Magn.) Moberg & R. Sant.
• Remark: earlier under Lecanora macrocyclos (H. Magn.) Degel.
• Fungus type: lichenized
• Treatment in Estonia: certain
• suur sõõrsamblik (endine suur liudsamblik)

• Species: Protoparmeliopsis muralis (Schreb.) M. Choisy
• Remark: earlier under Lecanora muralis (Schreb.) Rabenh.
• Fungus type: lichenized
• Treatment in Estonia: certain
• rant-sõõrsamblik (endine rant-liudsamblik)

• Species: Protothelenella corrosa (Körb.) H. Mayrhofer & Poelt
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Protothelenella sphinctrinoides (Nyl.) H. Mayrhofer & Poelt
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: doubtful extinct

• Species: Pseudevernia furfuracea (L.) Zopf
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• hall karesamblik

• Species: Pseudosagedia aenea (Wallr.) Hafellner & Kalb
• Remark: earlier under Porina aenea (Wallr.) Zahlbr.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Pseudosagedia chlorotica (Ach.) Hafellner & Kalb
• Remark: earlier under Porina chlorotica (Ach.) Müll. Arg.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Pseudosagedia linearis (Leight.) Hafellner & Kalb
• Remark: earlier under Porina linearis (Leight.) Zahlbr.
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Psilolechia clavulifera (Nyl.) Coppins
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Psilolechia lucida (Ach.) M. Choisy
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain

• Species: Psora decipiens (Hedw.) Hoffm.
• Remark:
• Fungus type: lichenized
• Treatment in Estonia: certain
• stepi-naastsamblik

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