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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8311 | Bacidia caligans | (Nyl.) A.L. Sm. (1911) | No | Bacidina caligans | 137 | LC NS | ||||
| 8312 | Bacidia caesiovirens | S. Ekman & Holien (1995) | Yes | Bacidia caesiovirens | 1926 | In NW Britain, often confused with B. biatorina | LC NS Sc IR | Bacidia caesiovirens | ||
| 8313 | Bacidia byssoboliza | (Nyl.) H. Olivier (1911) | No | Aquacidia antricola | 139 | LC NS | ||||
| 8314 | Bacidia brandii | Coppins & van den Boom (2002) | No | Bacidina brandii | 2411 | LC NR | ||||
| 8315 | Bacidia biatorina | (Körb.) Vain. (1922) | Yes | Bacidia biatorina | Bacidia endoleuca | 136 | LC | Bacidia biatorina | ||
| 8316 | Bacidia beckhausii | auct. brit. p.p. | No | Micarea longispora | 894 | name or specific epithet valid but has been misused in the past | LC NS Sc IR | |||
| 8317 | Bacidia beckhausii | Körb. (1860) | No | Biatora beckhausii | 135 | LC NS | ||||
| 8318 | Bacidia bagliettoana | (A. Massal. & De Not.) Jatta (1900) | Yes | Toniniopsis bagliettoana | 158 | LC | ||||
| 8319 | Bacidia auerswaldii | (Hepp ex Stizenb.) Mig. (1929) | No | Scutula effusa | Scutula effusa | 134 | DD NR | |||
| 8320 | Bacidia atrosanguinea subsp. oribata | (Nyl.) A.L. Sm. (1911) | No | Toniniopsis coelestina | 1424 | VU D1, D2 NR Sc | ||||
| 8321 | Bacidia atrosanguinea | auct. brit. | No | Toniniopsis separabilis | 168 | VU C, D1 NS P Eng Sc | ||||
| 8322 | Bacidia atrogrisea | (Delise ex Hepp) Körb. | No | Bacidia laurocerasi | 155 | LC | ||||
| 8323 | Bacidia assulata | auct. brit., non (Körb.) Vězda | Yes | Bacidia assulata | 133 | Not conspecific with Bacidina assulata | DD NR | Bacidia assulata | ||
| 8324 | Bacidia ascaridiella | (Nyl.) A.L. Sm. (1911) | No | Spirographa fusisporella | 2218 | LC NS | LF | |||
| 8325 | Bacidia arnoldiana f. corticola | Arnold (1862) | No | Bacidina modesta | 2502 | LC NS | ||||
| 8326 | Bacidia arnoldiana | auct. p.p. (corticolous specimens) | No | Bacidina modesta | 2502 | name or specific epithet valid but has been misused in the past | LC NS | |||
| 8327 | Bacidia arnoldiana | Körb. (1860) | No | Bacidina arnoldiana | 132 | LC | ||||
| 8328 | Bacidia arceutina var. hypnaea | (Nyl.) A.L. Sm. | No | Bacidia arceutina | 131 | LC | ||||
| 8329 | Bacidia arceutina f. deminuta | Th. Fr. | No | Bacidia arceutina | 131 | LC | ||||
| 8330 | Bacidia arceutina f. brevispora | Wheldon & Travis (1915) | No | ? Micarea lignaria | ||||||
| 8331 | Bacidia arceutina | (Ach.) Arnold (1869) | Yes | Bacidia arceutina | Bacidia leightoniana | 131 | LC | Bacidia arceutina | ||
| 8332 | Bacidia antricola | Hulting (1872) | No | Aquacida antricola | 139 | LC NS | ||||
| 8333 | Bacidia albidocarnea | (Nyl.) Zahlbr. (1927) | No | Bacidia fuscoviridis | 148 | LC NS Sc | ||||
| 8334 | Bacidia affinis | (Stizenb.) Vain. (1922) | No | Toniniopsis separabilis | 168 | VU C, D1 NS P Eng Sc | ||||
| 8335 | Bacidia adastra | Sparrius & Aptroot (2003) | No | Bacidina adastra | 2384 | LC NS | ||||
| 8336 | Bacidia acerina | auct. brit. p.max.p. | No | Bacidia laurocerasi | 155 | LC | ||||
| 8337 | Bacidia acerina | (Ach.) Arnold | No | Bacidia polychroa | 163 | Ex | ||||
| 8338 | Bacidia accedens | (Arnold) Lettau | No | Bilimbia sabuletorum | 165 | LC | ||||
| 8339 | Bacidia absistens | (Nyl.) Arnold (1870) | Yes | Bacidia absistens | 129 | LC | Bacidia absistens | |||
| 8340 | Bacidia abbrevians | (Nyl.) Th. Fr. | No | Bacidia igniarii | 1828 | VU D1 NR Sc |