Species (13.556)
- Lophodermium seditiosum Minter, Staley & Millar 1978
- Lophodermium versicolor (Wahlenb.) Rehm 1887
- Loramyces macrosporus Ingold & Chapman 1952
- Loricella alnea Velen. 1947
- Loricella ludmilae Velen. 1939
- Ludwigomyces parasiticus Kirschst. 1939
- Lulworthia fucicola G.K. Sutherl. 1916
- Lichenoconium erodens M.S. Christ. & D. Hawksw. 1977
- Lichenochora xanthoriae Triebel & Rambold 1991
- Lichenoconium usneae (Anzi) D. Hawksw. 1977
- Lichenoconium xanthoriae M.S. Christ. 1956
- Lichenodiplis pertusariicola (Nyl.) Diederich 2003
- Lichenodiplis lecanorae (Vouaux) Dyko & D. Hawksw. 1979
- Octosporopsis nicolai (Maire) U. Lindemann, M. Vega, T. Richter 2014
- Octospora sydowii (Rehm) M.M. Moser 1963
- Oculimacula yallundae (Wallwork & Spooner) Crous & W. Gams 2003
- Octosporella jungermanniarum (P. Crouan & H. Crouan) Döbbeler 1980
- Odontotrema diffindens Rehm 1881
- Oedocephalum pallidum (Berk. & Broome) Cost. 1886
- Ohleria obducens G. Winter 1872
- Ohleria rugulosa Fuckel 1870
- Oidiodendron griseum Robak 1934
- Ohleria modesta Fuckel 1868
- Oidiodendron tenuissimum (Peck) S. Hughes 1958
- Oidiopsis balsaminae Rajd. 1966
- Olla lachnoides Velen. 1934
- Olla graminicola Raitv. 2004
- Olla lonicerae Velen. 1934
- Olla millepunctata (Lib.) Svr?ek 1986
- Paratrichophaea parvispora Benkert 2010
- Paratrichophaea michiganensis (Kanouse) Pfister 1988
- Paratrichophaea boudieri (Grélet) Bronckers 2003
- Parorbiliopsis extumescens (P. Karst.) Spooner & Dennis 1986
- Parorbiliopsis luzulae-silvaticae Svr?ek 1993
- Parorbiliopsis salicis Svr?ek 1992
- Parorbiliopsis samarae (Velen.) Svr?ek 1992
- Parthenope pilatii Velen. 1939
- Passalora alni (Chupp & H.C. Greene) Deighton 1967
- Passalora bupleuri (Pers.) U. Braun 1997
- Passalora angelicae (Ellis & Everh.) U. Braun 1992
- Passalora bacilligera (Mont. & Fr.) Fresen. 1856
- Passalora cnidii (Constant.) Poonam Srivast. 1994
- Passeriniella discors (Sacc. & Ellis) Apinis & Chesters 1964
- Paurocotylis pila Berk. 1855
- Penicillium citrinum Thom 1910
- Penicillium digitatum (Pers.) Sacc. 1881
- Penicillium expansum Link ex Gray 1821
- Penicillium glandicola (Oudem.) Seifert & Samson 1985
- Penicillium raistrickii G. Sm. 1933
- Penicillium stoloniferum Thom 1910
- Periconia alba Preuss 1851
- Periconia byssoides Pers. : Fr. 1801
- Periconia atra Corda 1837
- Periconia cookei E.W. Mason & M.B. Ellis 1953
- Periconia curta (Berk.) E.W. Mason & M.B. Ellis 1953
- Periconia circinata (L. Mangin) Sacc. 1906
- Periconia digitata (Cooke) Sacc. 1886
- Periconia hispidula (Pers. : Fr.) E.W. Mason & M.B. Ellis 1953
- Periconia obscurata Kirschst. 1936
- Periconia macrospinosa Lefebvre & Aar.G. Johnson 1949
- Periconia minutissima Corda 1837
- Periconia typhicola E.W. Mason & M.B. Ellis 1953
- Peridiothelia fuliguncta (Norman) D. Hawksw. 1985
- Perisporium kunzei (Fuckel) Sacc. 1882
- Peroneutypa scoparia (Schwein.) Carmarán & A.I. Romero 2006
- Peroneutypella isariphora (Nitschke) Berl. 1902
- Passalora circumscissa (Sacc.) U. Braun 1995
- Passalora concors (Casp.) U. Braun & Crous 2003
- Passalora ferruginea (Fuckel) U. Braun & Crous 2003
- Passalora depressa (Berk. & Broome) Sacc. 1919
- Passalora murina (Ellis & Kellerm.) U. Braun & Crous 2003
- Passalora pastinacae (Sacc.) U. Braun 1992
- Passalora scandicearum (Magnus) U. Braun & Crous 2003
- Passalora spegazzinii U. Braun 1997
- Passalora scariolae Syd. 1994
- Passeriniella obiones (P. Crouan & H. Crouan) K.D. Hyde & Mouzouras 1988
- Passerinula candida Sacc. 1875
- Patellaria atrata (Hedw.) Fr. 1822
- Patellaria inclusa P. Karst. 1871
- Patellaria sanguineoatra Rehm 1881
- Patellariopsis atrovinosa (A. Bloxam ex Curr.) Dennis 1974
- Patellariopsis clavispora (Berk. & Broome) Dennis 1964
- Patellea atrosanguinea (Fuckel) Kirschst. 1938
- Patellea karschioides Kirschst. 1907
- Patellea pallida (Berk.) Massee 1895
- Patinella macrospora Massee 1893
- Patinella hyalophaea Sacc. 1875
- Patinella rubrotingens (Berk. & Broome) Sacc. 1889
- Patinella punctiformis Rehm 1889
- Penicillium brevicompactum Dierckx 1901
- Penicillium chrysogenum Thom 1910
- Penicillium simplicissimum (Oudem.) Thom 1930
- Penicillium vulpinum (Cooke & Massee) Seifert & Samson 1985
- Periconia cambrensis E.W. Mason & M.B. Ellis 1953
- Periconia funerea (Ces.) E.W. Mason & M. B. Ellis 1953
- Mollisia russea (Schmid-Heckel) Baral 2008
- Mollisia sesleriae (Velen.) L.G. Krieglst. 1999
- Mollisia sericeomarginata Svr?ek 1986