Checklist of lichens of Yukon Territory (Canada)
Version 31 December 2018
- Acarospora glaucocarpa (Wahlenb.) Körb. - Thomson (1997: 25)
- Acarospora schleicheri (Ach.) A. Massal. - Thomson (1997: 33)
- Adelolecia pilati (Hepp.) Hertel & Hafellner - Thomson (1997: 37)
- Alectoria nigricans (Ach.) Nyl. - Thomson (1984: 35)
- Alectoria ochroleuca (Hoffm.) A. Massal. - Thomson (1984: 37)
- Allantoparmelia alpicola (Th. Fr.) Essl. - Thomson (1984: 299 as Parmelia alpicola)
- Allocetraria madreporiformis (Ach.) Tuck. - Thomson (1984: 206 as Dactylina madreporiformis)
- Amandinea punctata (Hoffm.) Coppins & Scheid. - Thomson (1997: 138 as Buellia punctata)
- Arctocetraria andrejevii (Oxner) Kärnefelt & A. Thell - Thomson (1984: 72 as Cetraria andrejevii)
- Arctocetraria nigricascens (Nyl. in Kihlm.) Kärnefelt & A. Thell - Thomson (1984: 90 as Cetraria nigricascens)
- Arctoparmelia centrifuga (L.) Hale - Thomson (1984: 476 as Xanthoparmelia centrifuga)
- Arctoparmelia incurva (Pers.) Hale - Thomson (1984: 478 as Xanthoparmelia incurva)
- Arctoparmelia separata (Th. Fr.) Hale - Thomson (1984: 479 as Xanthoparmelia separata)
- Arthonia patellulata Nyl. - Thomson (1997: 47)
- Arthrorhaphis alpina (Schaer.) R. Sant. - Thomson (1997: 50)
- Asahinea chrysantha (Tuck.) W. L. Culb. & C. F. Culb. - Thomson (1984: 44)
- Asahinea scholanderi (Llano) W. L. Culb. & C. F. Culb. - Thomson (1984: 45)
- Aspicilia anseris (Lynge) Thomson - Thomson (1997: 61)
- Aspicilia candida (Anzi) Hue - Thomson (1997: 67)
- Aspicilia cinerea (L.) Körb. - Thomson (1997: 68)
- Aspicilia disserpens (Zahlbr.) Räsänen - Thomson (1997: 74)
- Athallia holocarpa (Hoffm.) Arup, Frödén & Søchting - Thomson (1997: 164 as Caloplaca holocarpa)
- Bacidia igniarii (Nyl.) Oxner - Thomson (1997: 103)
- Baeomyces carneus (Retz.) Flörke - Thomson (1984: 48)
- Baeomyces placophyllus Ach. - Thomson (1984: 49)
- Baeomyces rufus (Huds.) Rebent. - Thomson (1984: 52)
- Bellemerea cinereorufescens (Ach.) Clauzade & Cl. Roux - Thomson (1997: 116)
- Biatora cuprea (Sommerf.) Fr. - Thomson (1997: 341 as Lecidea cuprea)
- Biatora vernalis (L.) Fr. - Thomson (1997: 389 Lecidea vernalis)
- Bilimbia lobulata (Sommerf.) Hafellner & Coppins - Thomson (1997: 617 as Toninia lobulata)
- Bilimbia sabuletorum (Schreber) Arnold - Thomson (1997: 422 as Mycobilimbia sabuletorum)
- Blastenia ammiospila (Wahlenb.) Arup, Søchting & Frödén - Thomson (1997: 151 as Caloplaca ammiospila)
- Blennothallia crispa (Weber ex F. H. Wigg.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 183 as Collema crispum)
- Brodoa oroarctica (Krog) Goward - Thomson (1984: 239 as Hypogymnia oroarctica)
- Bryonora castanea (Hepp) Poelt - Thomson (1997: 122)
- Bryocaulon divergens (Ach.) Kärnefelt - Thomson (1984: 199 as Cornicularia divergens)
- Bryoplaca jungermanniae (Vahl) Søchting, Frödén & Arup - Thomson (1997: 166 as Caloplaca jungermanniae)
- Bryoplaca sinapisperma (Lam. & DC.) Søchting, Frödén & Arup - Thomson (1997: 170 as Caloplaca sinapisperma)
- Bryoplaca tetraspora (Nyl.) Søchting, Frödén & Arup - Thomson (1997: 172 as Caloplaca tetraspora)
- Bryoria chalybeiformis (L.) Brodo & D. Hawksw. - Thomson (1984: 56)
- Bryoria fuscescens (Gyeln.) Brodo & D. Hawksw. - Thomson (1984: 57)
- Bryoria lanestris (Ach.) Brodo & D. Hawksw. - Thomson (1984: 59)
- Bryoria simplicior (Vain.) Brodo & D. Hawksw. - Thomson (1984: 65)
- Buellia elegans Poelt - Nimis (1982: 5), Thomson (1997: 130)
- Buellia erubescens Arnold - Thomson (1997: 131)
- Calicium tigillare (Ach.) Pers. - Thomson (1997: 214 as Cyphelium tigillare)
- Calicium viride Pers. - Thomson (1997: 146)
- Caloplaca cerina (Ehrh. ex Hedwig) Th. Fr. -Thomson (1997: 154)
- Caloplaca fraudans (Th. Fr.) Oliv. - Thomson (1997: 162)
- Caloplaca stillicidiorum (Vahl) Lynge - Thomson (1997: 172)
- Calvitimela armeniaca (DC. in Lam. & DC.) Hafellner - Thomson (1997: 60 as Tephromela armeniaca)
- Candelariella aurella (Hoffm.) Zahlbr. - Thomson (1997: 182)
- Candelariella citrina Räsänen - Thomson (1997: 187 as Candelariella terrigena)
- Candelariella efflorescens Harris & Buck. - Thomson (1997: 184)
- Candelariella placodizans (Nyl.) H. Magn. - Thomson (1997: 186)
- Candelariella vitellina (Hoffm.) Müll. Arg. - Thomson (1997: 189)
- Candelariella xanthostigma (Ach.) Lettau - Thomson (1997: 190)
- Carbonea vorticosa (Flörke) Hertel - Thomson (1997: 193)
- Catapyrenium cinereum (Pers.) Körber - Thomson (1984: 215 as Dermatocarpon hepaticum)
- Catillaria chalybeia (Borrer) A. Massal. - Thomson (1997: 196)
- Cetraria aculeata (Schreb.) Fr. - Thomson (1984: 198 as Cornicularia aculeata)
- Cetraria ericetorum Opiz - Thomson (1984: 79)
- Cetraria islandica (L.) Ach. - Thomson (1984: 84)
- Cetraria laevigata Rass. - Thomson (1984: 88)
- Cetraria muricata (Ach.) Eckfeldt - Thomson (1984: 200 as Cornicularia muricata)
- Cetraria nigricans (Retz.) Nyl. - Thomson (1984: 89), Thell et al. (2002: 286 DNA: ITS)
- Cetraria sepincola (Ehrh.) Ach. - Thomson (1984: 94)
- Cetrariella commixta(Nyl.) A. Thell & Kärnefelt - Thomson (1984: 75 as Cetraria commixta)
- Cetrariella delisei (Bory ex Schaer.) Kärnefelt & A. Thell - Thomson (1984: 77 as Cetraria delisei)
- Cetrariella fastigiata (Del. ex Nyl. in Norrl.) Kärnefelt & A. Thell - Thomson (1984: 80 as Cetraria fastigiata)
- Circinaria caesiocinerea (Nyl. ex Malbr.) A. Nordin, Savic & Tibell - Thomson (1997: 65 as Aspicilia caesiocinerea)
- Cladonia acuminata (Ach.) Norrl. var. acuminata - Thomson (1984: 105), Thomson (1984: 152 as Cladonia norrlinii)
- Cladonia arbuscula (Wallr.) Flot. - Thomson (1984: 110)
- Cladonia bellidiflora (Ach.) Schaer. - Thomson (1984: 113)
- Cladonia botrytes (K. G. Hagen) Willd. - Thomson (1984: 114)
- Cladonia cariosa (Ach.) Spreng. - Thomson (1984: 116)
- Cladonia carneola (Fr.) Fr. - Thomson (1984: 117)
- Cladonia cenotea (Ach.) Schaer. - Thomson (1984: 118)
- Cladonia chlorophaea (Flörke ex Sommerf.) Spreng. - Thomson (1984: 119)
- Cladonia coccifera (L.) Willd. - Thomson (1984: 121)
- Cladonia cornuta (L.) Hoffm. - Thomson (1984: 124)
- Cladonia crispata (Ach.) Flot. - Thomson (1984: 125)
- Cladonia cyanipes (Sommerf.) Nyl. - Thomson (1984: 127)
- Cladonia deformis (L.) Hoffm. - Thomson (1984: 129)
- Cladonia ecmocyna Leight. - Thomson (1984: 131)
- Cladonia fimbriata (L.) Fr. - Thomson (1984: 132)
- Cladonia gracilis (L.) Willd. subsp. turbinata (Ach.) Ahti - Thomson (1984: 136)
- Cladonia gracilis (L.) Willd. var. gracilis - Thomson (1984: 137)
- Cladonia grayi Merrl. - Thomson (1984: 139)
- Cladonia kanewskii Oxn. - Ahti & Brodo (1981: 239), Thomson (1984: 140)
- Cladonia macrophylla (Schaer.) Stenham. - Thomson (1984: 141)
- Cladonia macrophyllodes Nyl. - Thomson (1984: 143)
- Cladonia merochlorophaea Asah. - Thomson (1984: 146)
- Cladonia metacorallifera Asah. - Thomson (1984: 147)
- Cladonia mitis Sandst. - Thomson (1984: 148)
- Cladonia multiformis Merr. - Thomson (1984: 149)
- Cladonia phyllophora Ehrh. ex. Hoffm. - Thomson (1984: 153)
- Cladonia pleurota (Flörke) Schaer. - Thomson (1984: 154)
- Cladonia pocillium (Ach.) Rich. - Thomson (1984: 156)
- Cladonia pyxidata (L.) Hoffm. - Thomson (1984: 158)
- Cladonia ramulosa (With.) J. R. Laundon - Thomson (1984: 109 as Cladonia anomaea)
- Cladonia rangiferina (L.) F. H. Wigg. - Thomson (1984: 159)
- Cladonia stellaris (Opiz) Pouzar & Vezda - Thomson (1984: 104 as Cladonia aberrans), Thomson (1984: 163)
- Cladonia stricta (Nyl.) Nyl. - Thomson (1984: 164)
- Cladonia subulata (L.) Weber ex F. H. Wigg. - Thomson (1984: 168)
- Cladonia sulphurina (Michx.) Fr. - Thomson (1984: 169)
- Cladonia symphycarpa (Ach.) Fr. - Thomson (1984: 170)
- Cladonia uncialis (L.) F. H. Wigg. - Thomson (1984: 173)
- Cladonia verticillata (Hoffm.) Schaer. - Thomson (1984: 174)
- Cladonia wainioi Savicz - Thomson (1984: 157 as Cladonia pseudorangiformis)
- Clauzadea monticola (Ach.) Hafellner & Bellem. - Thomson (1984: 208)
- Cyphelium inquinans (Sm.) Trevis. - Thomson (1997: 212)
- Dactylina arctica (Hook. f.) Nyl. - Thomson (1984: 203)
- Dactylina beringica C. D. Bird & J. W. Thomson - Thomson (1984: 204)
- Dactylina ramulosa (Hook. f.) Tuck. - Thomson (1984: 207)
- Dermatocarpon cinereum (Pers.) Th. Fr. - Thomson (1984: 211)
- Dibaeis baeomyces (L. f.) Rambold & Hertel - Thomson (1984: 51 as Baeomyces roseus)
- Dimelaena oreina (Ach.) Norman - Thomson (1997: 216)
- Diploschistes muscorum (Scop.) R. Sant. - Thomson (1997: 218)
- Diploschistes scruposus (Schreb.) Norman - Thomson (1997: 218)
- Diplotomma nivale (Bagl. & Carestia) Hafellner - Thomson (1997: 134 as Buellia nivalis)
- Enchylium bachmanianum (Fink) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 179 as Collema bachmanianum)
- Enchylium polycarpon (Hoffm.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 191 as Collema polycarpon)
- Enchylium tenax (Sw.) Gray - Thomson (1984: 192 as Collema tenax)
- Evernia mesomorpha Nyl. - Thomson (1984: 229)
- Evernia perfragilis Llano - Thomson (1984: 230)
- Farnoldia jurana (Schaer.) Hertel - Thomson (1997: 225)
- Farnoldia micropsis (A. Massal.) Hertel - Hertel (1977: 351 as Tremolecia nivalis), Thomson (1997: 226)
- Flavocetraria cucullata (Bellardi) Kärnefelt & A. Thell - Thomson (1984: 76 as Cetraria cucullata)
- Flavocetraria nivalis (L.) Kärnefelt & A. Thell - Thomson (1984: 92 as Cetraria nivalis)
- Fuscopannaria praetermissa (Nyl.) P. M. Jørg. - Thomson (1984: 320 as Parmeliella praetermissa)
- Gyalecta foveolaris (Ach.) Schaer. - Thomson (1997: 238)
- Gyalideopsis mexicana Tretiach, Giralt & Vezda - Lendemer (2011: 2)
- Gyalolechia bracteata (Hoffm.) A. Massal. subsp. bracteata - Nimis (1982: 5 as Fulgensia bracteata), Thomson (1997: 228 as Fulgensia bracteata)
- Gyalolechia xanthostigmoidea (Räsänen) Søchting, Frödén & Arup - Thomson (1997: 158 as Caloplaca discolor)
- Hymenelia epulotica (Ach.) Lutzoni - Thomson (1997: 253 as Ionaspis epulotica)
- Hymenelia melanocarpa (Kremp.) Arnold - Thomson (1997: 254 as Ionaspis melanocarpon)
- Hypogymnia austerodes Nyl. - Thomson (1984: 237)
- Hypogymnia bitteri (Lynge) Ahti - Thomson (1984: 238)
- Hypogymnia physodes (L.) Nyl. - Thomson (1984: 241)
- Hypogymnia subobscura (Vain.) - Thomson (1984: Poelt 242)
- Hypogymnia vittata (Ach.) Gas. - Thomson (1984: 243)
- Icmadophila ericetorum (L.) Zahlbr. - Thomson (1997: 249)
- Imshaugia aleurites (Ach.) S. F. Meyer - Thomson (1984: 322 as Parmeliopsis aleurites)
- Ionaspis schismatopsis (Nyl.) Hue - Thomson (1997: 254)
- Lasallia caroliniana (Tuck.) Davydov, Peršoh & Rambold - Thomson (1984: 445 as Umbilicaria caroliniana)
- Lasallia papulosa (Ach.) Llano - Thomson (1984: 245)
- Lasallia pensylvanica (Hoffm.) Llano - Thomson (1984: 246)
- Lathagrium fuscovirens (Ach.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 193 as Collema tuniforme)
- Lathagrium undulatum (Laur. ex Flot.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 194 as Collema undulatum)
- Lecanora allophana (Ach.) Nyl. - Thomson (1997: 266)
- Lecanora argopholis (Ach.) Ach. - Thomson (1997: 267)
- Lecanora behringii Nyl. - Thomson (1997: 270)
- Lecanora cadubriae (A. Massal.) Hedl. - Thomson (1997: 271)
- Lecanora cenisia Ach. - Thomson (1997: 272)
- Lecanora chlarotera Nyl. - Thomson (1997: 273), Thomson (1997: 301 as Lecanora rugosella)
- Lecanora circumborealis Brodo & Vitik. - Thomson (1997: 274)
- Lecanora crenulata Hook. - Thomson (1997: 277)
- Lecanora dispersa (Pers.) Sommerf. - Thomson (1997: 278)
- Lecanora epibryon (Ach.) Ach. - Thomson (1997: 279)
- Lecanora geophila (Th. Fr.) Poelt- Thomson (1997: 283)
- Lecanora hagenii (Ach.) Ach. - Thomson (1997:286)
- Lecanora luteovernalis Brodo - Thomson (1997: 290)
- Lecanora marginata (Schaer.) Hertel & Rambold- Thomson (1997: 291)
- Lecanora orae-frigidae R. Sant. - Thomson (1997: 297)
- Lecanora polytropa (Ehrh. in Hoffm.) Rabenh. - Thomson (1997: 299)
- Lecanora pulicaris - Thomson (1997: 301)
- Lecanora rupicola (L.) Zahlbr. - Thomson (1997: 303)
- Lecanora salicicola H. Magn. - Thomson (1997: 304)
- Lecanora subrugosa Nyl. - Thomson (1997: 308)
- Lecanora symmicta (Ach.) Ach. - Thomson (1997: 309)
- Lecanora zosterae (Ach.) Nyl. var. zosterae - Thomson (1997: 312)
- Lecidea atrobrunnea (Ramond ex Lam. & DC.) Schaerer subsp. atrobrunnea - Thomson (1997: 327)
- Lecidea auriculata Th. Fr. subsp. auriculata - Thomson (1997: 329)
- Lecidea lapicida (Ach.) Ach. - Thomson (1997: 355 as Lecidea lactea), Thomson (1997: 357)
- Lecidea paupercula Th. Fr. - Thomson (1997: 369)
- Lecidea plebeja Nyl. - Thomson (1997: 374)
- Lecidea ramulosa Th. Fr. - Thomson (1997: 376)
- Lecidea tessellata Flörke - Thomson (1997: 384)
- Lecidea theodori Lynge - Thomson (1997: 385)
- Lecidea turgidula Fr. - Thomson (1997: 388)
- Lecidea umbonata (Hepp) Mudd - Thomson (1997: 389)
- Lecidella elaeochroma (Ach.) Hazslin - Thomson (1997: 396)
- Lecidella euphorea (Flörke) Hertel - Thomson (1997: 398)
- Lecidella stigmatea (Ach.) Hertel & Leuckert - Thomson (1997: 402)
- Lecidoma demissum (Rutstr.) Gotth. Schneider & Hertel - Thomson (1997: 405)
- Leproplaca cirrochroa (Ach.) Arup, Frödén & Søchting - Thomson (1997: 155 as Caloplaca cirrochroa)
- Leptogium saturninum (Dicks.) Nyl. - Thomson (1984: 262)
- Lichenomphalia hudsoniana (H. S. Jenn.) Redhead, Lutzoni, Moncalvo & Vilgalys - Thomson (1984: 196 as Coriscium viride)
- Lobaria linita (Ach.) Rabenh. - Thomson (1984: 269)
- Lopadium coralloideum (Nyl.) Lynge - Thomson (1997: 409)
- Lopadium pezizoideum (Ach.) Körb. - Thomson (1997: 411)
- Masonhalea richardsonii (Hook.) Kärnefelt - Thomson (1984: 273), Thell et al. (2002: 286 DNA: ITS)
- Massalongia carnosa (Dicks.) Körb. - Thomson (1984: 275)
- Melanelia hepatizon (Ach.) A. Thell - Thomson (1984: 82 as Cetraria hepatizon)
- Melanelixia subaurifera (Nyl.) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Thomson (1984: 316 as Parmelia subaurifera)
- Melanohalea elegantula (Zahlbr.) O. Blanco, A. Crespo, Divakar, Essl., D. Hawksw. & Lumbsch - Thomson (1984: 300 as Parmelia elegantula)
- Melanohalea exasperatula (Nyl.) O. Blanco et al. - Thomson (1984: 300 as Parmelia exasperatula)
- Melanohalea infumata (Nyl.) O. Blanco et al. - Thomson (1984: 304 as Parmelia infumata)
- Melanohalea olivacea (L.) O. Blanco et al. - Thomson (1984: 306 as Parmelia olivacea)
- Melanohalea olivaceoides (Krog) O. Blanco et al. - Thomson (1984: 307 as Parmelia olivaceoides)
- Melanohalea septentrionalis (Lynge) O. Blanco et al. - Thomson (1984: 311 as Parmelia septentrionalis)
- Micarea assimilata (Nyl.) Coppins - Thomson (1997: 413)
- Micarea melaena (Nyl.) Hedl. - Thomson (1997: 419)
- Montanelia disjuncta (Erichsen) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 299 as Parmelia disjuncta)
- Montanelia sorediata (Ach.) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 312 as Parmelia sorediosa)
- Montanelia tominii (Oxner) Divakar, A. Crespo, Wedin & Essl. - Thomson (1984: 317 as Parmelia substygia)
- Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth - Thomson (1997: 331 as Lecidea berengeriana)
- Mycobilimbia epixanthoides (Nyl.) Vitik., Ahti, Kuusinen, Lommi & T. Ulvinen - Thomson (1997: 101 as Bacidia epixanthoides)
- Mycobilimbia pilularis (Körb.) Hafellner & Türk - Thomson (1997: 110 as Bacidia sphaeroides)
- Mycoblastus affinis (Schaer.) Schauer - Thomson (1997: 424)
- Mycoblastus sanguinarius (L.) Norman - Thomson (1997: 426)
- Nephroma arcticum (L.) Torss. - Thomson (1984: 277)
- Nephroma expallidum (Nyl.) Nyl. - Thomson (1984: 279)
- Nephroma parile (Ach.) Ach. - Thomson (1984: 282)
- Ochrolechia androgyna (Hoffm.) Arnold - Thomson (1997: 430)
- Ochrolechia frigida (Sw.) Lynge - Thomson (1997: 431)
- Ochrolechia gyalectina (Nyl.) Zahlbr. - Thomson (1997: 433)
- Ochrolechia inaequatula (Nyl.) Zahlbr. - Thomson (1997: 434)
- Ochrolechia upsaliensis (L.) A. Massal. - Thomson (1997: 436)
- Ophioparma lapponica (Räsänen) Hafellner & Rogers - Thomson (1997: 440)
- Orphniospora moriopsis (A. Massal.) D. Hawksw. - Thomson (1997: 441)
- Megaspora verrucosa (Ach.) Hafellner & V. Wirth - Thomson (1997: 443 as Pachyospora verrucosa)
- Pannaria pezizoides (Web.) Trev. - Thomson (1984: 294)
- Parmelia fraudans (Nyl.) Nyl. - Thomson (1984: 302)
- Parmelia omphalodes (L.) Ach. - Thomson (1984: 308)
- Parmelia saxatilis (L.) Ach. - Thomson (1984: 310)
- Parmelia sulcata Tayl. - Thomson (1984: 318)
- Parmeliopsis ambigua (Wulf.) Nyl. - Thomson (1984: 325)
- Parmeliopsis hyperopta (Ach.) Arnold - Thomson (1984: 326)
- Parvoplaca tiroliensis (Zahlbr.) Arup, Søchting & Frödén - Thomson (1997: 173 as Caloplaca tiroliensis)
- Peltigera aphtosa (L.) Willd. - Thomson (1984: 329)
- Peltigera canina (L.) Willd. - Thomson (1984: 332)
- Peltigera collina (Ach.) Schrad. - Thomson (1984: 335)
- Peltigera horizontalis (Huds.) Baumg. - Thomson (1984: 337)
- Peltigera lepidophora (Nyl.) Vain. - Thomson (1984: 338)
- Peltigera leucophlebia (Nyl.) Gyelnik - Thomson (1984: 330 as Peltigera aphtosa var. leucophlebia)
- Peltigera malacea (Ach.) Funck. - Thomson (1984: 339)
- Peltigera polydactylon (Neck.) Hoffm. - Thomson (1984: 343)
- Peltigera rufescens (Weiss) Humb. - Thomson (1984: 333 as Peltigera canina var. rufescens), Czeczuga et al. (2004: 283)
- Peltigera scabrosa Th. Fr. - Thomson (1984: 344)
- Peltigera venosa (L.) Baumg. - Thomson (1984: 345)
- Pertusaria alpina Hepp ex Ahles - Thomson (1997: 447)
- Pertusaria carneopallida (Nyl.) Anzi ex Nyl. - Thomson (1997: 451)
- Pertusaria coriacea (Th. Fr.) Th. Fr. - Thomson (1997: 452)
- Pertusaria dactylina (Ach.) Nyl. - Thomson (1997: 453)
- Pertusaria octomela (Norman) Erichsen - Thomson (1997: 457)
- Pertusaria oculata (Dickson) Th. Fr. - Thomson (1997: 458)
- Pertusaria panyrga (Ach.) A. Massal. - Thomson (1997: 459)
- Pertusaria subdactylina Nyl. - Thomson (1997: 461)
- Pertusaria subobducens Nyl. - Thomson (1997: 462)
- Phaeophyscia sciastra (Ach.) Moberg - Thomson (1984: 349)
- Phaeorrhiza nimbosa (Fr.) Mayrh. & Poelt - Thomson (1997: 467)
- Physcia aipolia (Ehrh. ex Humb.) Fürnr. - Thomson (1984: 353)
- Physcia caesia (Hoffm.) Fürnr. - Thomson (1984: 354)
- Physcia dubia (Hoffm.) Lettau - Thomson (1984: 355)
- Physcia phaea (Tuck.) J. W. Thomson - Thomson (1984: 356)
- Physconia muscigena (Ach.) Poelt - Thomson (1984: 360)
- Pilophorus dovrensis (Nyl.) Timdal, Hertel & Rambold - Thomson (1997: 367 Lecidea pallida)
- Placidium lachneum (Ach.) B. de Lesd. - Nimis (1982: 5 as Catopyrenium lachneum), Thomson (1984: 217 as Dermatocarpon lachneum)
- Placynthiella uliginosa (Schrad.) Coppins & James - Thomson (1997: 475)
- Placynthium asperellum (Ach.) Trevisan - Thomson (1984: 364 as Placynthium aspratile)
- Placynthium nigrum (Huds.) Gray - Thomson (1984: 366)
- Pleopsidium chlorophanum (Wahlenb. ex Ach.) Zopf - Thomson (1997: 22 as Acarospora chlorophana)
- Polyblastia cupularis A. Massal. - Thomson (1997: 478)
- Polyblastia hyperborea Th. Fr. - Thomson (1997: 481)
- Polyblastia sendtneri Kremp. - Thomson (1997: 482)
- Polyblastia theleodes (Sommerf.) Th. Fr. - Thomson (1997: 484)
- Polycauliona candelaria (L.) Frödén, Arup, & Søchting - Thomson (1984: 483 as Xanthoria candelaria)
- Porpidia flavicunda (Ach.) Gowan - Thomson (1997: 491)
- Porpidia lowiana Gowan - Thomson (1997: 494)
- Porpidia thomsonii Gowan - Thomson (1997: 498)
- Porpidia zeoroides (Anzi) Knoph & Hertel - Thomson (1997: 500)
- Protoblastenia calva (Dickson) Zahlbr. - Thomson (1997: 502)
- Protoblastenia rupestris (Scop.) Steiner - Thomson (1997: 503)
- Protoblastenia terricola (Anzi) Lynge - Thomson (1997: 503)
- Protomicarea limosa (Ach.) Hafellner - Thomson (1997: 361 as Lecidea limosa)
- Protoparmelia badia (Hoffm.) Ach. - Thomson (1997: 269 as Lecanora badia)
- Pseudephebe minuscula (Nyl. ex Arnold) Brodo & D. Hawksw. - Thomson (1984: 373)
- Pseudephebe pubescens (L.) M. Choisy - Thomson (1984: 374)
- Psora decipiens (Hedwig) Hoffm. - Nimis (1982: 5), Thomson (1997: 507)
- Psora globifera (Ach.) A. Massal. - Thomson (1997: 508)
- Psora himalayana (Bab.) Timdal - Thomson (1997: 507)
- Psora rubiformis (Ach.) Hook. - Nimis (1982: 5), Thomson (1997: 511)
- Psoroma hypnorum (Vahl) Gray - Thomson (1984: 376)
- Ramalina almquistii Vain. - Thomson (1984: 232 as Fistulariella almquistii)
- Ramalina thrausta (Ach.) Nyl. - Thomson (1984: 382)
- Ramboldia cinnabarina (Sommerf.) Kalb, Lumbsch & Elix - Thomson (1997: 336 Lecidea cinnabarina)
- Rhizocarpon chioneum (Norman) Th. Fr. - Thomson (1997: 527)
- Rhizocarpon concentricum (Davis) Beltram - Thomson (1997: 529)
- Rhizocarpon copelandii (Körb.) Th. Fr. - Thomson (1997: 531)
- Rhizocarpon distinctum Th. Fr. - Thomson (1997: 532)
- Rhizocarpon eupetraeoides (Nyl.) Blomb. & Forss. - Thomson (1997: 532)
- Rhizocarpon eupetraeum (Nyl.) Arnold - Thomson (1997: 533)
- Rhizocarpon ferax H. Magn. - Thomson (1997: 535)
- Rhizocarpon geminatum Körb. - Thomson (1997: 537)
- Rhizocarpon geographicum (L.) DC. - Thomson (1997: 538)
- Rhizocarpon grande (Flörke ex Flot.) Arnold - Thomson (1997: 539)
- Rhizocarpon hochstetteri (Körb.) Vain. - Thomson (1997: 540)
- Rhizocarpon inarense (Vain.) Vain. - Thomson (1997: 541)
- Rhizocarpon intermediellum Räsänen - Thomson (1997: 542)
- Rhizocarpon macrosporum Räsänen - Thomson (1997: 543)
- Rhizocarpon pusillum Runem. - Thomson (1997: 547)
- Rhizocarpon superficiale (Schaer.) Vainio - Thomson (1997: 551)
- Rhizocarpon umbilicatum (Ramond) Flagey - Thomson (1997: 552)
- Rhizoplaca chrysoleuca (Sm.) Zopf - Thomson (1997: 554)
- Rhizoplaca melanophthalma (Ramond) Leuck. & Poelt - Thomson (1997: 555)
- Rinodina archaea (Ach.) Vain. - Thomson (1997: 560)
- Rinodina endophragmia J. M. Lamb - Thomson (1997: 564)
- Rinodina mniaraea (Ach.) Körb. - Thomson (1997: 567)
- Rinodina roscida (Sommerf.) Arnold - Thomson (1997: 569)
- Rinodina turfacea (Wahlenb.) Körb. - Thomson (1997: 571)
- Ropalospora lugubris (Sommerf.) Poelt - Thomson (1997: 571)
- Rusavskia elegans (Link) S. Y. Kondr. & Kärnefelt - Thomson (1984: 485 as Xanthoria elegans)
- Rusavskia sorediata (Vain.) S. Y. Kondr. & Kärnefelt - Thomson (1984: 487 as Xanthoria sorediata)
- Sagiolechia protuberans (Ach.) A. Massal.- Thomson (1997: 574)
- Sarcogyne regularis Körb. - Thomson (1997: 579)
- Scytinium lichenoides (L.) Otálora, P. M. Jørg. & Wedin - Thomson (1984: 257 as Leptogium lichenoides)
- Solorina bispora Nyl. - Thomson (1984: 386)
- Solorina crocea (L.) Ach. - Thomson (1984: 389)
- Solorina octospora (Arnold) Arnold - Thomson (1984: 389)
- Solorina saccata (L.) Ach. - Thomson (1984: 390)
- Solorina spongiosa (Sm.) Anzi - Thomson (1984: 391)
- Sphaerophorus fragilis (L.) Pers. - Thomson (1984: 392)
- Sphaerophorus globosus (Huds.) Vain. - Thomson (1984: 394)
- Sporastatia testudinea (Ach.) A. Massal. - Thomson (1997: 589)
- Squamarina lentigera (Weber) Poelt - Nimis (1982: 5)
- Staurothele discedens (Nyl.) Zahlbr. - Thomson (1997: 593)
- Staurothele drummondii (Tuck.) Tuck. - Thomson (1997: 595)
- Stereocaulon alpinum Laur. - Thomson (1984: 399)
- Stereocaulon botryosum Ach. em. Frey - Thomson (1984: 405)
- Stereocaulon glareosum (Sav.) H. Magn. - Thomson (1984: 412)
- Stereocaulon grande (H. Magn.) H. Magn. - Thomson (1984: 413)
- Stereocaulon paschale (L.) Hoffm. - Thomson (1984: 418)
- Stereocaulon rivulorum H. Magn. - Thomson (1984: 421)
- Stereocaulon tomentosum Fries - Thomson (1984: 428)
- Tephromela atra (Huds.) Hafellner - Thomson (1997: 633)
- Tetramelas geophila (Flörke ex Sommerf.) Lynge - Thomson (1997: 133 as Buellia geophila)
- Tetramelas papillatus (Sommerf.) Tuck. - Thomson (1997: 136 as Buellia papillata)
- Thamnolia subuliformis (Ehrh.) W. L. Culb. - Thomson (1984: 438)
- Thamnolia vermicularis (Sw.) Ach. ex Schaer. - Thomson (1984: 438)
- Thelidium minutulum Körb. - Thomson (1997: 605)
- Toninia sedifolia (Scop.) Timdal - Nimis (1982: 5), Thomson (1997: 614 as Toninia caeruleonigricans)
- Trapelia coarctata (Turner ex Sm. & Sow.) M. Choisy - Thomson (1997: 621)
- Trapeliopsis granulosa (Hoffm.) Lumbsch - Thomson (1997: 624)
- Tremolecia atrata (Ach.) Hertel - Thomson (1997: 627)
- Umbilicaria angulata Tuck. - Thomson (1984: 442)
- Umbilicaria arctica (Ach.) Nyl. - Thomson (1984: 444)
- Umbilicaria cinereorufescens (Schaer.) Frey - Thomson (1984: 446)
- Umbilicaria cylindrica (L.) Del. in Duby - Thomson (1984: 448)
- Umbilicaria deusta (L.) Baumg. - Thomson (1984: 449)
- Umbilicaria havaasii Llano - Thomson (1984: 451)
- Umbilicaria hyperborea (Ach.) Hoffm. var. hyperborea - Thomson (1984: 453)
- Umbilicaria polyphylla (L.) Baumg. - Thomson (1984: 457)
- Umbilicaria polyrrhiza (L.) Fr. - Thomson (1984: 27 as Actinogyra polyrrhiza)
- Umbilicaria proboscidea (L.) Schrad. - Thomson (1984: 458)
- Umbilicaria rigida (Du Rietz) Frey - Thomson (1984: 31 as Agyrophora rigida)
- Umbilicaria torrefacta (Lightf.) Schrad. - Thomson (1984: 459)
- Umbilicaria vellea (L.) Ach. - Thomson (1984: 460)
- Umbilicaria virginis Schaer. - Thomson (1984: 290 as Omphalodiscus virginis)
- Usnea subfloridana Stirt. - Thomson (1984: 469)
- Usnea substerilis Motyka - Thomson (1984: 470)
- Varicellaria rhodocarpa (Körb.) Th. Fr. - Thomson (1997: 629)
- Verrucaria aethiobola Wahlenb. - Thomson (1997: 632)
- Verrucaria devergens Nyl. - Thomson (1997: 635)
- Verrucaria muralis Ach. - Thomson (1997: 641)
- Verrucaria rupestris Schrad. - Thomson (1997: 643)
- Vulpicida pinastri (Scop.) Gray - Thomson (1984: 93 as Cetraria pinastri)
- Vulpicida tilesii (Ach.) J.-E. Mattsson & M. J. Lai - Thomson (1984: 95 as Cetraria tilesii)
- Wahlenbergiella striatula (Wahlenb.) Gueidan & Thüs - Thomson (1997: 645 as Verrucaria striatula)
- Xanthocarpia tominii (Savicz) Frödén, Arup & Søchting - Nimis (1982: 5), Thomson (1997: 175 as Caloplaca tominii)
- Xanthomendoza fallax (Hepp ex Arnold) Söchting, Kärnefelt & S. Kondr. - Thomson (1984: 486 as Xanthoria fallax)
- Xanthoparmelia coloradoensis (Kremp.) Hale - Thomson (1984: 480 erroneously as Xanthoparmelia taractica)