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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 721 | Bacidia pulvinata | (Taylor) Mudd | No | Toninia thiopsora | 1425 | LC NS | ||||
| 722 | Bacidia rosella | auct. brit. p.p. | No | Bacidina phacodes | 161 | LC | ||||
| 723 | Bacidia rosella | auct. brit. p.p. | No | Bacidia rubella | 164 | LC | ||||
| 724 | Bacidia rubella | (Hoffm.) A. Massal. (1852) | Yes | Bacidia rubella | Bacidia luteola | 164 | LC | Bacidia rubella | ||
| 725 | Bacidia sabuletorum | (Schreb.) Lettau (1912) | No | Bilimbia sabuletorum | 165 | LC | ||||
| 726 | Bacidia salicicola | Wheldon & Travis (1915) | No | Scoliciosporum chlorococcum | 1320 | LC | ||||
| 727 | Bacidia saxenii | Erichsen (1941) | No | Bacidina saxenii | 1593 | LC NS | ||||
| 728 | Bacidia scopulicola | auct. p.min.p. [non-isidiate/sorediate specimens] | No | Bacidia sipmanii | 2501 | name or specific epithet valid but has been misused in the past | NE NR | |||
| 729 | Bacidia scopulicola | (Nyl.) A.L. Sm. (1911) | Yes | Bacidia scopulicola | 166 | LC | Bacidia scopulicola | |||
| 730 | Bacidia sipmanii | M. Brand, Coppins, van den Boom & Sérus. (2009) | Yes | Bacidia sipmanii | 2501 | NE NR | Bacidia sipmanii | |||
| 731 | Bacidia sphaeroides | auct. brit. p.p. | No | Bilimbia sabuletorum | 165 | LC | ||||
| 732 | Bacidia sphaeroides | auct. brit. p.p. | No | Lecania naegelii | 159 | LC | ||||
| 733 | Bacidia sphaeroides | auct. brit. p.p. | No | Micarea alabastrites | 871 | LC Sc IR | ||||
| 734 | Bacidia sphaeroides | (Dicks.) Zahlbr., non auct. brit. p.max.p. | No | Mycobilimbia sphaeroides | 320 | LC L* | ||||
| 735 | Bacidia spododes | (Nyl.) Zahlbr. | No | Micarea nitschkeana | 885 | LC | ||||
| 736 | Bacidia squamellosa | auct. brit. non (S. Ekman) Coppins & Aptroot | No | Bacidina celtica | 1732 | LC NS | ||||
| 737 | Bacidia squamellosa | (S. Ekman) Coppins & Aptroot (2008) | No | Bacidina squamellosa | Incorrectly reported from the Britih Isles | |||||
| 738 | Bacidia subacerina | Vain. (1922) | No | Bacidia laurocerasi | 155 | LC | ||||
| 739 | Bacidia subcircumspecta | Coppins (1992) | No | Bibbya subcircumspecta | 1651 | LC NS Sc IR | ||||
| 740 | Bacidia subfuscula | (Nyl.) Th. Fr. (1867) | No | Bacidina subfuscula | 167 | LC NS | ||||
| 741 | Bacidia subincompta | auct. | No | Toniniopsis separabilis | 168 | VU C, D1 NS P Eng Sc | ||||
| 742 | Bacidia subtilis | Vězda (1961) | No | Fellhanera subtilis | 1754 | LC NR | ||||
| 743 | Bacidia subturgidula | (Nyl.) Zahlbr. (1926) | Yes | Bacidia subturgidula | 169 | CR D NR E P Eng IR | Bacidia subturgidula | |||
| 744 | Bacidia subviridescens | (Nyl.) Zahlbr. | No | Micarea subviridescens | 2361 | LC NR | ||||
| 745 | Bacidia sulphurella | Samp. (1924) | No | Bacidina modesta | 2502 | LC NS | ||||
| 746 | Bacidia tetramera | (De Not.) Coppins (1988) | No | Mycobilimbia tetramera | 160 | VU D1+2 NR Sc | ||||
| 747 | Bacidia trachona | (Ach.) Lettau (1912) | No | Aquacidia trachona | 170 | LC NS | ||||
| 748 | Bacidia trisepta | auct. p.max.p. | No | Micarea peliocarpa | 886 | LC | ||||
| 749 | Bacidia umbrina | (Ach.) Bausch | No | Scoliciosporum umbrinum | 1322 | LC | ||||
| 750 | Bacidia umbrina var. compacta | (Körb.) Th. Fr. (1874) | No | Scoliciosporum umbrinum | 1322 | LC |