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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1381 | Calogaya oblitterata | (Pers.) P.F. Cannon & Coppins (2024) | Yes | Calogaya oblitterata | Caloplaca arnoldii auct. brit.; Caloplaca arnoldii subsp. oblitterata | 236 | LC | Calogaya oblitterata | ||
| 1382 | Calogaya pusilla | (A. Massal.) Arup, Frödén & Søchting (2013) | Yes | Calogaya pusilla | Caloplaca murorum auct. brit.; Caloplaca pusilla; Caloplaca saxicola auct. brit. | 277 | LC | Calogaya pusilla | ||
| 1383 | Caloplaca ahtii | Søchting (1994) | Yes | Caloplaca ahtii | 2318 | DD NR P Sc | Caloplaca ahtii | |||
| 1384 | Caloplaca albolutescens | (Nyl.) H. Olivier (1909) | No | Kuettlingeria albolutescens | 2503 | LC NS | ||||
| 1385 | Caloplaca alociza | (A. Massal.) Mig. (1925) | No | Pyrenodesmia alociza | 233 | LC NS | ||||
| 1386 | Caloplaca alstrupii | Søchting (1999) | Yes | Caloplaca alstrupii | 2612 | Caloplaca alstrupii | ||||
| 1387 | Caloplaca ammiospila | (Wahlenb.) H. Olivier (1909) | No | Blastenia ammiospila | 1746 | EN D NR Sc | ||||
| 1388 | Caloplaca ammiospila | (Wahlenb.) H. Olivier | No | incorrectly reported from the British Isles | ||||||
| 1389 | Caloplaca approximata | (Lynge) H. Magn. (1946) | No | Amundsenia approximata | 1591 | NT NR Sc | ||||
| 1390 | Caloplaca aractina | (Fr.) Häyrén (1914) | No | Sanguineodiscus aractinus | 234 | VU D2 NR P Eng | ||||
| 1391 | Caloplaca arcis | (Poelt & Vězda) Arup (2006) | No | Flavoplaca arcis | 2442 | LC NS | ||||
| 1392 | Caloplaca arenaria | (Pers.) Müll. Arg. (1862) | No | Rufoplaca arenaria | 235 | LC NS | ||||
| 1393 | Caloplaca arnoldii | sensu auct. brit. | No | Calogaya oblitterata | 236 | LC | ||||
| 1394 | Caloplaca arnoldii subsp. obliterata | (Pers.) Gaya (2009) [orthogr. error] | No | Calogaya oblitterata | 236 | orthographic error | LC | |||
| 1395 | Caloplaca arnoldii subsp. oblitterata | (Pers.) Gaya (2009) | No | Calogaya oblitterata | 236 | LC | ||||
| 1396 | Caloplaca asserigena | (J. Lahm) Della Torre & Sarnth. (1902) | No | Marchantiana asserigena | 2371 | LC NS | ||||
| 1397 | Caloplaca atroflava | (Turner) Mong. (1914) | No | Kuettlingeria atroflava | 237 | CR D NR P Wa | ||||
| 1398 | Caloplaca atroflava var. submersa | (Nyl.) H. Magn. (1944) | No | ? Kuettlingeria atroflava | ||||||
| 1399 | Caloplaca aurantia | (Pers.) Hellb. (1890) | No | Variospora aurantia | 239 | LC | ||||
| 1400 | Caloplaca aurantia var. heppiana | (Müll. Arg.) Poelt (1954) | No | Variospora flavescens | 259 | LC | ||||
| 1401 | Caloplaca aurantia var. irrubescens | (Nyl. ex Arnold) Jatta (1900) | No | Squamulea subsoluta | 262 | DD NR Sc | ||||
| 1402 | Caloplaca aurantiaca | (Lightf.) Th. Fr., non auct. | No | Blastenia ferruginea s. lat. | 2280 | |||||
| 1403 | Caloplaca aurantiaca | auct. p.p. [corticolous] | No | Gyalolechia flavorubescens | 254 | EN A NS P Eng Sc Wa | ||||
| 1404 | Caloplaca aurantiaca | auct. p.p. [saxicolous] | No | Gyalolechia flavovirescens | 255 | LC | ||||
| 1405 | Caloplaca aurantiaca | No | 1544 | BLS number no longer used | ||||||
| 1406 | Caloplaca aurea | (Schaer.) Zahlbr. | No | incorrectly reported from the British Isles | ||||||
| 1407 | Caloplaca austrocitrina | Vondrák, Říha, Arup & Søchting (2009) | No | Flavoplaca austrocitrina | 2613 | LC | ||||
| 1408 | Caloplaca borreri | J.R. Laundon (2005) | Yes | Caloplaca borreri | 2430 | Ex | Caloplaca borreri | |||
| 1409 | Caloplaca britannica | R. Sant. (1992) | No | Haloplaca britannica | 1689 | LC NS ?E Sc IR | ||||
| 1410 | Caloplaca caesiorufa | auct. brit., non (Schrad.) Flagey | No | Kuettlingeria ceracea | 1644 | LC |