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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8341 | Tichothecium perpusillum | (Nyl.) Arnold (1874) | No | Endococcus perpusillus | 2059 | NE NR | LF | |||
| 8342 | Tichothecium pygmaeum | Körb. | No | Muellerella pygmaea | 2118 | LC | LF | |||
| 8343 | Tichothecium pygmaeum var. ecatonosporum | (Anzi) G. Winter | No | Muellerella pygmaea | 2118 | LC | LF | |||
| 8344 | Tichothecium pygmaeum var. erraticum | (A. Massal.) Vouaux | No | Muellerella lichenicola | 2116 | LC | LF | |||
| 8345 | Tichothecium pygmaeum var. ventosicola | (Mudd) G. Winter | No | Muellerella ventosicola | 2120 | NE NR | LF | |||
| 8346 | Tichothecium rimosicola | (Leight.) Arnold (1861) | No | Phaeospora rimosicola | 2142 | LC NR | LF | |||
| 8347 | Tichothecium rugulosum | (Nyl.) Arnold | No | Endococcus rugulosus | 2061 | NE NR | LF | |||
| 8348 | Tichothecium squamarioides | (Mudd) G. Winter | No | Polycoccum squamarioides | 2168 | NE NR | LF | |||
| 8349 | Tichothecium stereocaulicola | (Linds.) Arnold | No | Polycoccum trypethelioides | 2169 | NT NR | LF | |||
| 8350 | Tichothecium stigma | auct. | No | Endococcus perpusillus | 2059 | NE NR | LF | |||
| 8351 | Tichothecium vermicularium | (Linds.) Arnold | No | incorrectly reported from the British Isles | LF | |||||
| 8352 | Tingiopsidium elaeinum | (Wahlenb.) Hafellner & T. Sprib. (2016) | Yes | Tingiopsidium elaeinum | Vestergrenopsis elaeina | 1822 | VU D2 NR Sc | Tingiopsidium elaeinum | ||
| 8353 | Toensbergia geminipara | (Th. Fr.) T. Sprib. & Resl (2020) | Yes | Toensbergia geminipara | Ochrolechia geminipara; Pertusaria geminipara | 923 | NT NR Sc | Toensbergia geminipara | ||
| 8354 | Toensbergia leucococca | (R. Sant.) Bendiksby & Timdal (2013) | Yes | Toensbergia leucococca | Hypocenomyce leucococca; Pycnora leucococca | 1868 | DD NR Sc | Toensbergia leucococca | ||
| 8355 | Tomasellia diffusa | (Leight.) J. Lahm (1885) | Yes | Tomasellia diffusa | Melanotheca diffusa | 1730 | LC NR Sc | F | Tomasellia diffusa | |
| 8356 | Tomasellia gelatinosa | (Chevall.) Zahlbr. (1922) | Yes | Tomasellia gelatinosa | Melanotheca gelatinosa | 1565 | LC | F | Tomasellia gelatinosa | |
| 8357 | Tomasellia ischnobela | (Nyl.) Keissl. | No | Celothelium ischnobelum | 1566 | LC | ||||
| 8358 | Tomasellia lactea | (Ach.) R.C. Harris | No | Mycoporum lacteum | 1576 | NT NS Sc | F | |||
| 8359 | Toninia alutacea | (Anzi) H. Olivier | No | incorrectly reported from the British Isles | ||||||
| 8360 | Toninia aromatica | (Sm.) A. Massal. (1855) | No | Toniniopsis aromatica | 1415 | LC | ||||
| 8361 | Toninia caeruleonigricans | auct. | No | Thalloidima sedifolium | 1416 | LC P Eng Wa | ||||
| 8362 | Toninia cambrica | (Wheldon) Walt. Watson | No | Stereocaulon leucophaeopsis | 1639 | LC NS M* | ||||
| 8363 | Toninia candida | (Weber) Th. Fr. (1867) | No | Thalloidima candidum | incorrectly reported from the British Isles, BLS number 1417 no longer used | |||||
| 8364 | Toninia caradocensis | (Leight. ex Nyl.) J. Lahm | No | Xylopsora caradocensis | 576 | LC | ||||
| 8365 | Toninia carbonacea | Anzi (1860) | No | Toniniopsis verrucarioides | 1418 | LC NS | ||||
| 8366 | Toninia cervina | Lönnr. (1858) | No | Toniniopsis verrucarioides | 1418 | LC NS | ||||
| 8367 | Toninia coelestina | (Anzi) Vězda (1961) | No | Toniniopsis coelestina | 1424 | VU D1, D2 NR Sc | ||||
| 8368 | Toninia cumulata | (Sommerf.) Th. Fr. | No | Stereocaulon cumulatum | 1419 | Ex | ||||
| 8369 | Toninia diffracta | (A. Massal.) Zahlbr. (1901) | No | Thalloidima diffractum | 1903 | DD NR Sc | ||||
| 8370 | Toninia episema | (Nyl.) Timdal (1991) | No | Kiliasia episema | 1904 | LC | LF |