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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5491 | Monerolechia badia | (Fr.) Kalb (2004) | Yes | Monerolechia badia | Buellia badia | 1546 | LC NS | Monerolechia badia | ||
| 5492 | Monodictys anaptychiae | (Lindau) D. Hawksw. (1975) | Yes | Monodictys anaptychiae | 2112 | NE NR | LF | Monodictys anaptychiae | ||
| 5493 | Monodictys cellulosa | S. Hughes (1958) | Yes | Monodictys cellulosa | Monodictys lepraria | 2113 | NE NR | LF | Monodictys cellulosa | |
| 5494 | Monodictys epilepraria | Kukwa & Diederich (2005) | Yes | Monodictys epilepraria | 2433 | NE NR | LF | Monodictys epilepraria | ||
| 5495 | Monodictys fuliginosa | Etayo (1996) | Yes | Monodictys fuliginosa | 2114 | NE NR | LF | Monodictys fuliginosa | ||
| 5496 | Monodictys lepraria | (Berk.) M.B. Ellis | No | Monodictys cellulosa | 2113 | NE NR | LF | |||
| 5497 | Montanelia disjuncta | (Erichsen) Divakar, A. Crespo, Wedin & Essl. (2012) | Yes | Montanelia disjuncta | Melanelia disjuncta; Parmelia disjuncta | 992 | LC NS | Montanelia disjuncta | ||
| 5498 | Mosigia illita | (Nyl.) R. Sant. | No | Rimularia badioatra | 733 | LC NS | ||||
| 5499 | Mosigia intercedens | (H. Magn.) R. Sant. | No | Rimularia intercedens | 1633 | LC NS | ||||
| 5500 | Mucor furfuraceus | L. (1753) | No | Coniocybe furfuracea | 466 | LC | ||||
| 5501 | Muellerella atricola | (Linds.) Sacc. & D. Sacc. | No | ? Muellerella lichenicola {LF} | LF | |||||
| 5502 | Muellerella erratica | (A. Massal.) Hafellner & Volk. John (2006) | Yes | Muellerella erratica | Muellerella pygmaea var. athallina | 2119 | NE NR | LF | Muellerella erratica | |
| 5503 | Muellerella haplotella | (Nyl.) Arnold ex Zopf (1896) | Yes | Muellerella haplotella | Muellerella polyspora auct. brit. | 2117 | lichenicolous fungus on Arthonia radiata | NE NR | LF | Muellerella haplotella |
| 5504 | Muellerella hospitans | Stizenb. (1863) | Yes | Muellerella hospitans | 2115 | NE NR | LF | Muellerella hospitans | ||
| 5505 | Muellerella lichenicola | (Sommerf.) D. Hawksw. (1979) | Yes | Muellerella lichenicola | 2116 | LC | LF | Muellerella lichenicola | ||
| 5506 | Muellerella opegraphicola | Zopf (1896) | No | Muellerella haplotella | 2117 | NE NR | LF | |||
| 5507 | Muellerella polyspora | auct. brit. non Hepp ex Müll. Arg. (1862) | No | Muellerella haplotella | 2117 | NE NR | LF | |||
| 5508 | Muellerella pygmaea | (Körb.) D. Hawksw. (1979) | Yes | Muellerella pygmaea | 2118 | LC | LF | Muellerella pygmaea | ||
| 5509 | Muellerella pygmaea var. athallina | (Müll. Arg.) Triebel | No | Muellerella erratica | 2119 | NE NR | LF | |||
| 5510 | Muellerella pygmaea var. ventosicola | (Mudd) Triebel | No | Muellerella ventosicola | 2120 | NE NR | LF | |||
| 5511 | Muellerella solenopsorae | Brien, Cl. Roux & Monnat (2022) | Yes | Muellerella solenopsorae | 2929 | on Solenopsora holophaea; Ireland only | LF | |||
| 5512 | Muellerella triseptata | Diederich (1986) | No | Capronia triseptata | 2772 | NE NR | LF | |||
| 5513 | Muellerella ventosicola | (Mudd) D. Hawksw. (2003) | Yes | Muellerella ventosicola | 2120 | NE NR | LF | Muellerella ventosicola | ||
| 5514 | Multiclavula corynoides | (Peck) R.H. Petersen (1967) | Yes | Multiclavula corynoides | 2755 | NE NR | Multiclavula corynoides | |||
| 5515 | Multiclavula mucida | (Pers.) R.H. Petersen (1967) | Yes | Multiclavula mucida | 2559 | NE NR | Multiclavula mucida | |||
| 5516 | Multiclavula vernalis | (Schwein.) R.H. Petersen (1967) | Yes | Multiclavula vernalis | 1779 | DD NR Sc | Multiclavula vernalis | |||
| 5517 | Mycobacidia arenicola | (Mudd) Sacc. & D. Sacc. | No | Arthrorhaphis grisea | 313 | LC NS | LF | |||
| 5518 | Mycobacidia flavovirescens | (A. Massal.) Rehm (1890) | No | Arthrorhaphis citrinella | 100 | LC | ||||
| 5519 | Mycobilimbia accedens | (Arnold) V. Wirth & Hafellner ex Hafellner (1989) | No | Bilimbia sabuletorum | 165 | LC | ||||
| 5520 | Mycobilimbia ahlesii | (Körb.) R. Sant., com. inval. | No | Bryobilimbia ahlesii | 790 | LC NS |