For more information see the Supplementary Notes for the Taxon Dictionary, which explains the names and synonyms, and these Instructions on how to use the online Taxon Dictionary which includes details of the Conservation Evaluation codes.
| Count | Name | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 241 | Anisomeridium biforme | (Borrer) R.C. Harris (1978) | Yes | Anisomeridium biforme | Acrocordia biformis Arthopyrenia biformis |
48 | LC | Anisomeridium biforme | ||
| 242 | Anisomeridium juistense | (Erichsen) R.C. Harris | No | Anisomeridium polypori | 49 | LC | ||||
| 243 | Anisomeridium macropycnidiatum | van den Boom (2015) | Yes | Anisomeridium macropycnidiatum | 2769 | So far Ireland only | Anisomeridium macropycnidiatum | |||
| 244 | Anisomeridium nyssaegenum | (Ellis & Everh.) R.C. Harris | No | Anisomeridium polypori | 49 | LC | ||||
| 245 | Anisomeridium polypori | (Ellis & Everh.) M.E. Barr (1996) | Yes | Anisomeridium polypori | Anisomeridium juistense Anisomeridium nyssaegenum Arthopyrenia willeyana Sarcinulella banksiae |
49 | LC | Anisomeridium polypori | ||
| 246 | Anisomeridium ranunculosporum | (Coppins & P. James) Coppins (2002) | Yes | Anisomeridium ranunculosporum | Arthopyrenia cinereopruinosa auct. p.p.; Arthopyrenia ranunculospora | 1584 | LC | Anisomeridium ranunculosporum | ||
| 247 | Anisomeridium robustum | Orange, Coppins & Aptroot (2008) | Yes | Anisomeridium robustum | 2499 | LC NS | Anisomeridium robustum | |||
| 248 | Anisomeridium viridescens | (Coppins) R.C. Harris (1995) | Yes | Anisomeridium viridescens | Arthopyrenia viridescens | 1607 | LC NS Sc IR | Anisomeridium viridescens | ||
| 249 | Antennulariella lichenisata | Coppins & Aptroot (2008) | Yes | Antennulariella lichenisata | 2500 | LC NS E IR | Antennulariella lichenisata | |||
| 250 | Anthracothecium hibernicum | (Nyl.) A.L. Sm. (1911) | No | Pyrenula hibernica | 1036 | VU D2 NR P Sc Wa S8 IR | ||||
| 251 | Anthracothecium pyrenuloides | auct. brit. non (Mont.) Müll. Arg. | No | Pyrenula hibernica | 1036 | VU D2 NR P Sc Wa S8 IR | ||||
| 252 | Anziella adglutinata | (Anzi) Gyeln. | No | Placynthium flabellosum | 1135 | LC NS | ||||
| 253 | Aphanopsis coenosa | (Ach.) Coppins & P. James (1984) | Yes | Aphanopsis coenosa | 728 | LC NR Sc | Aphanopsis coenosa | |||
| 254 | Aquacidia antricola | (Hulting) Aptroot (2018) | Yes | Aquacidia antricola | Bacidia antricola; Bacidia byssoboliza; Bacidea carneoglauca; Verrucaria torta | 139 | LC NS | Aquacidia antricola | ||
| 255 | Aquacidia trachona | (Ach.) Aptroot (2018) | Yes | Aquacidia trachona | Bacidia trachona | 170 | LC NS | Aquacidia trachona | ||
| 256 | Aquacidia viridifarinosa | (Coppins & P. James) Aptroot (2018) | Yes | Aquacidia viridifarinosa | Bacidia viridifarinosa | 1583 | LC | Aquacidia viridifarinosa | ||
| 257 | Arctomia delicatula | Th. Fr. (1860) | Yes | Arctomia delicatula | Placynthium delicatulum | 50 | NT NR Sc | Arctomia delicatula | ||
| 258 | Arctomia fascicularis | (L.) Otálora & Wedin (2013) | No | Gabura fascicularis | 444 | NT NS P Sc WaL IR | ||||
| 259 | Arctoparmelia incurva | (Pers.) Hale (1986) | Yes | Arctoparmelia incurva | Parmelia incurva | 1000 | LC | Arctoparmelia incurva | ||
| 260 | Arrhenia cupulatoides | (Orton) I. Saar & Voitk (2024) | Yes | Arrhenia cupulatoides | Arrhenia peltigerina auct. brit. p.p.; Omphalina cupulatoides; Omphalina peltigerina auct. brit. p.p. | 2908 | NE NR | LF | ||
| 261 | Arrhenia griseopallida | (Desm.) Watling (1989) | Yes | Arrhenia griseopallida | Omphalina griseopallida | No longer considered to be lichenized | NE | F | ||
| 262 | Arrhenia mohniensis | Voitk, Burzynski & I. Saar (2024) | Yes | Arrhenia mohniensis | Arrhenia peltigerina auct. brit. p.p.; Omphalina peltigerina auct. brit. p.p. | 2909 | on Peltigera | NE NR | LF | |
| 263 | Arrhenia peltigerina | auct. brit. p.p. non (Peck) Redhead, Lutzoni, Moncalvo & Vilgalys (2002) | No | Arrhenia mohniensis | 2909 | NE NR | LF | |||
| 264 | Arrhenia peltigerina | auct. brit. p.p. non (Peck) Redhead, Lutzoni, Moncalvo & Vilgalys (2002) | No | Arrhenia cupulatoides | 2908 | NE NR | LF | Arrhenia peltigerina | ||
| 265 | Arthonia abelonae | P.M. Jørg. (1970) [orth. error] | No | Corticiruptor abeloneae | 1915 | NT NR | ||||
| 266 | Arthonia abeloneae | P.M. Jørg. (1970) | No | Corticiruptor abeloneae | 1915 | lichenicolous on Sticta 'doufourii' | NT NR | LF | ||
| 267 | Arthonia almquistii | Vain. (1883) | Yes | Arthonia almquistii | 771 | NE NR Sc | LF | Arthonia almquistii | ||
| 268 | Arthonia amylospora | Almq. (1880) | Yes | Arthonia amylospora | 1930 | LC NR Sc | LF | Arthonia amylospora | ||
| 269 | Arthonia anastomosans | auct. brit. p.p. | No | Arthothelium lirellans | 1569 | LC NS Sc IR | F | |||
| 270 | Arthonia anastomosans | auct. brit. p.p. | No | Arthothelium orbilliferum | 1711 | LC NS Sc IR | F |