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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8611 | Arthonia intexta | Almq. (1880) | Yes | Arthonia intexta | 1933 | NE NR | LF | Arthonia intexta | ||
| 8612 | Arthonia insinuata | Stirt. (1876) | No | Naevia punctiformis | 68 | LC | F | |||
| 8613 | Arthonia impolita | (Hoffm.) Borrer | No | Pachnolepia pruinata | 63 | LC | ||||
| 8614 | Arthonia ilicinella | Nyl. (1867) | Yes | Arthonia ilicinella | 62 | NT NS E Sc IR | Arthonia ilicinella | |||
| 8615 | Arthonia ilicina | Taylor (1836) | Yes | Arthonia ilicina | Arthothelium ilicinum | 94 | LC Sc IR | Arthonia ilicina | ||
| 8616 | Arthonia hypnophila | Coppins ad int. | No | Arthonia mediella | 413 | LC NS | ||||
| 8617 | Arthonia hibernica | Nyl. (1876) | No | Arthonia excipienda | 1599 | NT NR Sc | F | |||
| 8618 | Arthonia gregaria var. kermesina | (Schaer.) Willey (1890) | No | Coniocarpon cinnabarinum | 72 | LC | ||||
| 8619 | Arthonia gregaria var. kermesina | (Schaer.) Willey (1890) | No | Coniocarpon cinnabarinum | 72 | LC | ||||
| 8620 | Arthonia gregaria var. dubia | (Turner & Borrer) Mudd | No | Coniocarpon cinnabarinum | 72 | LC | ||||
| 8621 | Arthonia gregaria f. cuspidans | (Nyl.) A.L. Sm. (1926) | No | Coniocarpon cuspidans | 58 | LC | ||||
| 8622 | Arthonia gregaria | (Weigel) Körb., non Fée | No | Coniocarpon cinnabarinum | 72 | LC | ||||
| 8623 | Arthonia graphidicola | Coppins (1989) | Yes | Arthonia graphidicola | 735 | LC NS Sc IR | LF | Arthonia graphidicola | ||
| 8624 | Arthonia granitophila | Th. Fr. (1865) | Yes | Arthonia granitophila | Melaspilea granitophila; Melaspilea subarenacea | 868 | LC NS | Arthonia granitophila | ||
| 8625 | Arthonia glaucomaria | Nyl. (1856) | No | Arthonia varians | 714 | LC NS | LF | |||
| 8626 | Arthonia gelidae | R. Sant. (1986) | Yes | Arthonia gelidae | 1961 | NE NR | LF | Arthonia gelidae | ||
| 8627 | Arthonia galactites | (DC.) Dufour (1818) | Yes | Arthonia galactites | 61 | Ex | F | Arthonia galactites | ||
| 8628 | Arthonia galactinaria | Leight. | No | Arthonia apotheciorum | 1501 | LC NS | LF | |||
| 8629 | Arthonia fuscopurpurea | (Tul.) R. Sant. (1960) | Yes | Arthonia fuscopurpurea | 775 | LC NS | LF | Arthonia fuscopurpurea | ||
| 8630 | Arthonia fusca | (A. Massal.) Hepp (1860) | Yes | Arthonia fusca | Arthonia lapidicola auct. | 64 | LC | Arthonia fusca | ||
| 8631 | Arthonia exilis | auct. brit. | No | Bryostigma lapidicola | 1700 | LC NS | ||||
| 8632 | Arthonia excipienda | (Nyl.) Leight. (1871) | Yes | Arthonia excipienda | Arthonia dispersa var. excipienda Arthonia hibernica |
1599 | NT NR Sc | F | Arthonia excipienda | |
| 8633 | Arthonia epiphyscia | sensu D. Hawksw. (1983) p.p. | No | Arthonia phaeophysciae | 1982 | LC NR | LF | |||
| 8634 | Arthonia epiphyscia | Nyl. (1875) | Yes | Arthonia epiphyscia | 122 | lichenicolous on Physcia | LC NR | LF | Arthonia epiphyscia | |
| 8635 | Arthonia epipasta | auct. brit. p.max.p. | No | Naevia punctiformis | 68 | LC | F | |||
| 8636 | Arthonia epipasta | auct. brit. p.min.p. | No | Arthonia radiata | 69 | LC | ||||
| 8637 | Arthonia epimela | (Norman ex Almq.) Minks (1892) | Yes | Arthonia epimela | 2818 | on Amandinea punctata | NE NR | LF | ||
| 8638 | Arthonia epicladonia | (Nyl.) Alstrup & Zhurb. (2004) | No | Zhurbenkoa epicladonia | 2199 | NE NR | LF | |||
| 8639 | Arthonia endlicheri | (Garov.) Oxner (1956) | No | Sparria endlicheri | 59 | LC ?NS Sc | ||||
| 8640 | Arthonia elegans | (Ach.) Almq. (1880), auct. brit. p.min.p. | No | Coniocarpon fallax | 2760 | LC |