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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 871 | Thelidium acrotellum | Arnold | No | Thelidium minutulum | 1391 | LC | ||||
| 872 | Thelenella vezdae | No | 2397 | BLS number no longer used | ||||||
| 873 | Thelenella muscorum var. octospora | (Nyl.) Coppins & Fryday (2004) | Yes | Thelenella muscorum var. octospora | Chromatochlamys muscorum var. octospora | 1778 | NE NR Sc | Thelenella muscorum var. octospora | ||
| 874 | Thelenella muscorum var. muscorum | (Th. Fr.) Vain. (1899) | Yes | Thelenella muscorum var. muscorum | Chromatochlamys muscorum var. muscorumMicroglaena muscorum | 901 | LC | Thelenella muscorum var. muscorum | ||
| 875 | Thelenella modesta | (Nyl.) Nyl. (1855) | Yes | Thelenella modesta | Microglaena modesta | 900 | CR B NR P Sc | Thelenella modesta | ||
| 876 | Thelenella larbalestieri | (A.L. Sm.) Coppins & Fryday (2004) | Yes | Thelenella larbalestieri | Chromatochlamys larbalestieri Microglaena larbalestieri |
899 | VU D2 NR E Sc IR | Thelenella larbalestieri | ||
| 877 | Thamnolia vermicularis var. subuliformis | (Ehrh.) Schaer. (1850) | No | Thamnolia vermicularis | 1382 | LC | ||||
| 878 | Thamnolia vermicularis | (Sw.) Schaer. (1850) | Yes | Thamnolia vermicularis | Thamnolia subuliformis; Thamnolia vermcicularis subsp. subuliformis | 1382 | LC | Thamnolia vermicularis | ||
| 879 | Thamnolia subuliformis | (Ehrh.) W.L. Culb.(1963) | No | Thamnolia vermicularis | 1382 | LC | ||||
| 880 | Thamnogalla crombiei | (Mudd) D. Hawksw. (1980) | Yes | Thamnogalla crombiei | 2245 | DD NR | LF | Thamnogalla crombiei | ||
| 881 | Thalloidima tumidulum | (Sm.) Szatala (1932) | No | Porpidinia tumidula | 1429 | Ex | ||||
| 882 | Thalloidima squamatum | (Hoffm.) M. Westb. & Timdal (2023) | Yes | Thalloidima squamatum | 2874 | NE NR | ||||
| 883 | Thalloidima sedifolium | (Scop.) Kistenich, Timdal, Bendiksby & S. Ekman (2018) | Yes | Thalloidima sedifolium | Toninia caeruleonigricans auct.; Toninia sedifolia | 1416 | LC P Eng Wa | Thalloidima sedifolium | ||
| 884 | Thalloidima rosulatum | Anzi (1868) | Yes | Thalloidima rosulatum | Toninia rosulata | 1814 | EN D NR Sc | Thalloidima rosulatum | ||
| 885 | Thalloidima physaroides | (Opiz) Kistenich, Timdal, Bendiksby & S. Ekman (2018) | Yes | Thalloidima physaroides | Toninia lurida; Toninia physaroides | 1906 | CR B2, C2 NR P Eng | Thalloidima physaroides | ||
| 886 | Thalloidima opuntioides | (Vill.) Kistenich, Timdal, Bendiksby & S. Ekman (2018) | Yes | Thalloidima opuntioides | Toninia opuntioides | 1905 | Not extinct. Needs re-evaluating | NR | Thalloidima opuntioides | |
| 887 | Thalloidima diffractum | (A. Massal.) A. Massal. (1853) | Yes | Thalloidima diffractum | Toninia diffracta | 1903 | DD NR Sc | Thalloidima diffractum | ||
| 888 | Thalloidima cumulatum | (Sommerf.) Hellb. | No | Stereocaulon cumulatum | 1419 | Ex | ||||
| 889 | Thalloidima coeruleonigricans | auct. | No | Thalloidima sedifolium | 1416 | LC P Eng Wa | ||||
| 890 | Thalloidima candidum | (Weber) A. Massal. (1852) | No | incorrectly reported from the British Isles | ||||||
| 891 | Tetramelos pulverulentus | |||||||||
| 892 | Tetramelas pulverulentus | (Anzi) A. Nordin & Tibell (2005) | Yes | Tetramelas pulverulentus | Buellia pulverulenta; Diplotomma pulverulenta | 1855 | NE NR Sc | Tetramelas pulverulentus | ||
| 893 | Tetramelas papillatus | (Sommerf.) Kalb (2004) | Yes | Tetramelas papillatus | Buellia papillata | 256 | CR D NR Sc | Tetramelas papillatus | ||
| 894 | Tetramelas insignis | (Körb.) Kalb (2004) | Yes | Tetramelas insignis | Buellia insignis | 208 | CR D NR Sc | Tetramelas insignis | ||
| 895 | Tephromela pertusarioides | (Degel.) Hafellner & Cl. Roux (1985) | Yes | Tephromela pertusarioides | 1810 | DD NR | Tephromela pertusarioides | |||
| 896 | Tephromela grumosa | (Pers.) Hafellner & Cl. Roux (1985) | Yes | Tephromela grumosa | Lecanora atra var. grumosa Lecanora grumosa |
654 | LC | Tephromela grumosa | ||
| 897 | Tephromela atra var. torulosa | (Flot.) Hafellner (1992) | Yes | Tephromela atra var. torulosa | 2349 | LC NS | Tephromela atra var. torulosa | |||
| 898 | Tephromela atra var. atra | (Huds.) Hafellner (1983) | Yes | Tephromela atra var. atra | Lecanora atra | 630 | LC | Tephromela atra var. atra | ||
| 899 | Tephromela armeniaca | (DC.) Hertel & Rambold | No | Calvitimela armeniaca | 697 | LC NR Sc | ||||
| 900 | Tephromela aglaea | (Sommerf.) Hertel & Rambold (1885) | No | Calvitimela aglaea | 693 | LC NS |