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 Sort ascending | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 8551 | Arthonia subfuscicola | (Linds.) Triebel (1991) | Yes | Arthonia subfuscicola | 1936 | lichenicolous on Lecanora carpinea | NE NR Sc | LF | Arthonia subfuscicola | |
| 8552 | Arthonia subastroidea subsp. orbilliferum | Almq. (1880) | No | Arthothelium orbilliferum | 1711 | LC NS Sc IR | F | |||
| 8553 | Arthonia stictarum | (Tul.) Th. Fr. | No | Plectocarpon lichenum | 2153 | LC NS | LF | |||
| 8554 | Arthonia stereocaulina | (Ohlert) R. Sant. (1993) | Yes | Arthonia stereocaulina | 2406 | lichenicolous on Stereocaulon | DD NR | LF | Arthonia stereocaulina | |
| 8555 | Arthonia stellaris | auct. brit. p.p., non Kremp. | No | Synarthonia astroidestera | 1687 | name or specific epithet valid but has been misused in the past | NT NS IR | |||
| 8556 | Arthonia stellaris | Kremp. (1861) | Yes | Arthonia stellaris | 71 | LC NS | Arthonia stellaris | |||
| 8557 | Arthonia spadicea | Leight. (1854) | No | Diarthonis spadicea | 70 | LC | ||||
| 8558 | Arthonia sampaianae | (Diederich & Etayo) Ertz & Diederich (2005) | Yes | Arthonia sampaianae | Plectocarpon sampaianae | 2154 | lichenicolous on Fuscopannaria sampaiana | NT NR | LF | Arthonia sampaianae |
| 8559 | Arthonia ruana | A. Massal. (1852) | No | Arthothelium ruanum | 97 | LC NS | ||||
| 8560 | Arthonia reniformis | (Pers.) Röhl. (1813) | Arthonia reniformis | Incorrectly reported from the British Isles | ||||||
| 8561 | Arthonia radiata var. swartziana | (Ach.) P. Syd. | No | Arthonia radiata | 69 | LC | ||||
| 8562 | Arthonia radiata | (Pers.) Ach. (1808) | Yes | Arthonia radiata | Arthonia radiata var. swartziana | 69 | LC | Arthonia radiata | ||
| 8563 | Arthonia punctilliformis | Leight. | No | of uncertain affinity | F | |||||
| 8564 | Arthonia punctilliformis | Leight. (1876) | Yes | Arthonia punctilliformis | 2010 | NE NR | F | |||
| 8565 | Arthonia punctiformis var. melantera | sensu Leight. | No | Naevia punctiformis | 68 | LC | F | |||
| 8566 | Arthonia punctiformis | Ach. (1808) | No | Naevia punctiformis | 68 | LC | F | |||
| 8567 | Arthonia punctella | Nyl. (1859) | Yes | Arthonia punctella | 1929 | lichenicolous on Diplotomma alboatrum | LC NR | LF | Arthonia punctella | |
| 8568 | Arthonia pruinata | (Pers.) Steud. ex A.L. Sm. (1911) | No | Pachnolepia pruinata | 63 | LC | ||||
| 8569 | Arthonia protoparmeliopseos | Etayo & Diederich (2009) | Yes | Arthonia protoparmeliopseos | 2631 | on thallus & apothecia of Lecanora muralis | NE NR | LF | Arthonia protoparmeliopseos | |
| 8570 | Arthonia protoparmeliae | Etayo (2010) | Yes | Arthonia protoparmeliae | 2655 | lichenicolous on Protoparmelia badia | NE NR | LF | Arthonia protoparmeliae | |
| 8571 | Arthonia pineti | Körb. | No | Arthonia didyma | 56 | LC | ||||
| 8572 | Arthonia phaeophysciae | Grube & Matzer (1997) | Yes | Arthonia phaeophysciae | 1982 | lichenicolous on Phaeophyscia orbicularis | LC NR | LF | Arthonia phaeophysciae | |
| 8573 | Arthonia phaeobaea | (Norman) Norman (1869) | Yes | Arthonia phaeobaea | 67 | LC NS | Arthonia phaeobaea | |||
| 8574 | Arthonia peltigerea | Th. Fr. (1866) | Yes | Arthonia peltigerea | 1935 | NE NR | LF | Arthonia peltigerea | ||
| 8575 | Arthonia patellulata | auct. brit. p.p. | No | Arthonia didyma | 56 | name or specific epithet valid but has been misused in the past | LC | |||
| 8576 | Arthonia patellulata | auct. brit. p.p. | No | Bryostigma lapidicola | 1700 | name or specific epithet valid but has been misused in the past | LC NS | |||
| 8577 | Arthonia patellulata | Nyl. (1853) | Yes | Arthonia patellulata | 66 | NT NS P Sc | Arthonia patellulata | |||
| 8578 | Arthonia parietinaria | Hafellner & A. Fleischhacker (2016) | Yes | Arthonia parietinaria | 2683 | parasitic on Xanthoria parietina | NE NS | LF | Arthonia parietinaria | |
| 8579 | Arthonia paralia | Nyl. | No | Arthonia phaeobaea | 67 | LC NS | ||||
| 8580 | Arthonia pannariae | Zhurb. & Grube (2010) | Yes | Arthonia pannariae | 2576 | lichenicolous on Psoroma hypnorum | NE NR | LF | Arthonia pannariae |