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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 421 | Arthonia varia | (Tul.) Jatta (1900) | No | Phacothecium varium | 1953 | LC NR | LF | |||
| 422 | Arthonia varians | (Davies) Nyl. (1861) | Yes | Arthonia varians | Arthonia glaucomaria | 714 | LC NS | LF | Arthonia varians | |
| 423 | Arthonia vinosa | Leight. (1856) | Yes | Arthonia vinosa | Arthonia didyma auct. brit. p.p. | 73 | LC L* | Arthonia vinosa | ||
| 424 | Arthonia vinosa var. pineti | (Körb.) Leight. (1871) | No | Arthonia didyma | 56 | LC | ||||
| 425 | Arthonia zwackhii | Sandst. (1903) | No | Reichlingia zwackhii | 74 | NT NR Sc | ||||
| 426 | Arthonia zwackhii var. macrospora | P. James | No | Synarthonia astroidestera | 1687 | NT NS IR | ||||
| 427 | Arthophacopsis parmeliarum | Hafellner (1998) | Yes | Arthophacopsis parmeliarum | 1983 | LC NR | LF | Arthophacopsis parmeliarum | ||
| 428 | Arthopyrenia aeruginella | (Nyl.) Arnold | No | Mycoglaena myricae | 1278 | LC NS | F | |||
| 429 | Arthopyrenia alba | (Schrad.) Zahlbr. (1922) | No | Acrocordia gemmata | 34 | LC L* | ||||
| 430 | Arthopyrenia allogena | (Nyl.) Arnold (1870) | Yes | Arthopyrenia allogena | 2011 | NE NR | LF | Arthopyrenia allogena | ||
| 431 | Arthopyrenia analepta | (Ach.) A. Massal. (1852) | Yes | Arthopyrenia analepta | Arthopyrenia fallax; Arthopyrenia lapponina | 1540 | LC | F | Arthopyrenia analepta | |
| 432 | Arthopyrenia analepta auct. brit. p.p. | auct. brit. p.p. | No | Naetrocymbe punctiformis | 1542 | name or specific epithet valid but has been misused in the past | LC | F | ||
| 433 | Arthopyrenia analeptoides | (Nyl.) A.L. Sm. | No | Mycoporum antecellens | 75 | LC | F | |||
| 434 | Arthopyrenia antecellans | (Nyl.) Arnold [orth. error] | No | Mycoporum antecellens | 75 | LC | F | |||
| 435 | Arthopyrenia antecellens | (Nyl.) Arnold | No | Mycoporum antecellens | 75 | LC | F | |||
| 436 | Arthopyrenia aphorisasa | (Stirt.) A.L. Sm. | No | status uncertain; type not traced | ||||||
| 437 | Arthopyrenia arenicola | (Leight.) A.L. Sm. (1911) | No | Collemopsidium argilospilum | 77 | DD NR IR | ||||
| 438 | Arthopyrenia areniseda | A.L. Sm. | No | Collemopsidium arenisedum | 1889 | NT NR IR | ||||
| 439 | Arthopyrenia argilospila | (Nyl.) A.L. Sm. | No | Collemopsidium argilospilum | 77 | DD NR IR | ||||
| 440 | Arthopyrenia atractospora | Zahlbr. (1935) | No | Naetrocymbe atractospora | 1979 | NT NR Sc | ||||
| 441 | Arthopyrenia biformis | (Borrer) A. Massal. | No | Anisomeridium biforme | 48 | LC | ||||
| 442 | Arthopyrenia bryospila | (Nyl.) Arnold | No | Frigidopyrenia bryospila | 78 | DD NR | ||||
| 443 | Arthopyrenia byssacea | (Taylor) A.L. Sm. | No | Anisomeridium biforme | 48 | LC | ||||
| 444 | Arthopyrenia caesia | (Nyl.) Zahlbr. | No | Collemopsidium caesium | 79 | NT NR Sc | ||||
| 445 | Arthopyrenia callunae | (De Not.) Aptroot (2006) | Yes | Arthopyrenia callunae | 2923 | NE NR | F | |||
| 446 | Arthopyrenia carneobrunneola | Coppins (1988) | No | Naetrocymbe carneobrunneola | 1622 | LC NS Sc IR | ||||
| 447 | Arthopyrenia cembrina | (Anzi) Grummann ex D. Hawksw. (1980) | No | Naetrocymbe punctiformis | 1542 | LC | F | |||
| 448 | Arthopyrenia cerasi | (Schrad.) A. Massal. (1852) | Yes | Arthopyrenia cerasi | 81 | LC NS | F | Arthopyrenia cerasi | ||
| 449 | Arthopyrenia chlorococca | (Leight.) A.L. Sm. (1911) | No | Normandina chlorococca | 2837 | LC | ||||
| 450 | Arthopyrenia cinereopruinosa | auct. brit. p.p. pre-c. 1980 [e.g. as used in original, 1976 version of RIEC] | No | Anisomeridium ranunculosporum | 1584 | name or specific epithet valid but has been misused in the past | LC |