| Soortnaam | Auteur(s) | Publicatiejaar |
|---|
| Marasmius abrubtipes | Corner | 1996 |
| Marasmius abundans | Corner | 1996 |
| Marasmius acanthocheilus | Desjardin & E. Horak | 1997 |
| Marasmius acerinus | Peck | 1899 |
| Marasmius acerosus | Y.S. Tan & Desjardin | 2007 |
| Marasmius aciebrunneus | Corner | 1996 |
| Marasmius aciecretaceus | Corner | 1996 |
| Marasmius acierufus | Corner | 1996 |
| Marasmius actiniceps | (Kalchbr. & Cooke) D.A. Reid | 1975 |
| Marasmius aculeatus | Pat. | 1900 |
| Marasmius acuminatus | Henn. | 1899 |
| Marasmius acutus | Corner | 1996 |
| Marasmius adhaesus | Corner | 1996 |
| Marasmius adisianus | Singer | 1989 |
| Marasmius aequatorialis | Singer | 1976 |
| Marasmius africanus | (Pat.) Sacc. | 1895 |
| Marasmius afrosulphureus | Courtec. | 1984 |
| Marasmius aimara | Singer | 1965 |
| Marasmius alachuanus | Murrill | 1942 |
| Marasmius albertianus | Singer | 1964 |
| Marasmius albidocremeus | Antonín | 2003 |
| Marasmius albidomurinus | Singer | 1989 |
| Marasmius albidus | Grgur. | 1997 |
| Marasmius albimyceliosus | Corner | 1996 |
| Marasmius albinanus | Corner | 1996 |
| Marasmius albofarinaceus | Henn. | 1901 |
| Marasmius albogriseus | (Peck) Singer | 1943 |
| Marasmius albopurpureus | T.H. Li & C.Q. Wang | 2015 |
| Marasmius albostipitatus | Chun Y. Deng & T.H. Li | 2012 |
| Marasmius alienigenus | J.S. Oliveira | 2020 |
| Marasmius alienus | Peck | 1910 |
| Marasmius alliacioides | Henn. | 1895 |
| Marasmius alliarius | Petch | 1948 |
| Marasmius alliifoetidus | Corner | 1996 |
| Marasmius alliipotens | Corner | 1996 |
| Marasmius alliodoratissimus | Garrido | 1988 |
| Marasmius allium | Eichelb. | 1906 |
| Marasmius allocystis | Singer | 1976 |
| Marasmius alniphilus | J. Favre | 1952 |
| Marasmius alopecuis | (Berk. & M.A. Curtis) Neda | 2004 |
| Marasmius alpinus | Killerm. | 1933 |
| Marasmius altoribeirensis | J.S. Oliveira | 2020 |
| Marasmius alveolaris | Cleland | 1927 |
| Marasmius amabilis | Har. & Pat. | 1903 |
| Marasmius amaryllidis | Torrend | 1913 |
| Marasmius amazonicus | Henn. | 1904 |
| Marasmius ambicellularis | J.S. Oliveira | 2020 |
| Marasmius amethystinus | J. Favre | 1955 |
| Marasmius amomi | Petch | 1948 |
| Marasmius amygdalosporus | Manim. & Leelav. | 1988 |
| Marasmius andasibensis | Antonín & Buyck | 2006 |
| Marasmius angustilamellatus | Y.S. Tan & Desjardin | 2009 |
| Marasmius anisocystidiatus | Antonín, Desjardin & H. Gsell | 1992 |
| Marasmius antarcticus | Speg. | 1887 |
| Marasmius apatelius | Singer | 1964 |
| Marasmius apogonus | Singer | 1977 |
| Marasmius aporpus | Singer | 1969 |
| Marasmius araneocephalus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius araucariae | Singer | 1965 |
| Marasmius arborescens | (Henn.) Beeli | 1928 |
| Marasmius argentinensis | Speg. | 1926 |
| Marasmius arimana | Dennis | 1951 |
| Marasmius aripoensis | (Dennis) Singer | 1965 |
| Marasmius armeniacus | Gilliam | 1975 |
| Marasmius artocarpi | Corner | 1996 |
| Marasmius arundinaceus | Velen. | 1927 |
| Marasmius ascendens | Petch | 1948 |
| Marasmius asemiformis | Singer | 1989 |
| Marasmius asiaticus | Mešić & Tkalčecc | 2010 |
| Marasmius aspilocephalus | Singer | 1965 |
| Marasmius ater | Singer | 1976 |
| Marasmius atlanticus | Singer | 1976 |
| Marasmius atroalbus | Henn. | 1895 |
| Marasmius atrocastaneus | G. Stev. | 1964 |
| Marasmius atroincrustatus | Singer | 1976 |
| Marasmius atropurpureus | Murrill | 1915 |
| Marasmius atrorubens | (Berk.) Mont. | 1854 |
| Marasmius aucklandicus | Henn. | 1896 |
| Marasmius aurantiacus | I. Hino | 1943 |
| Marasmius aurantioferrugineus | Hongo | 1965 |
| Marasmius aurantiostipitatus | Antonín | 2004 |
| Marasmius auratus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius auriformis | Henn. | 1897 |
| Marasmius australis | Z.S. Bi & T.H. Li | 1987 |
| Marasmius austrorotula | Singer | 1969 |
| Marasmius avellaneus | J.S. Oliveira | 2020 |
| Marasmius aztecus | Singer | 1976 |
| Marasmius badiceps | Peck | 1897 |
| Marasmius badiiceps | Corner | 1996 |
| Marasmius baeocephalus | Singer | 1976 |
| Marasmius bahamensis | Murrill | 1915 |
| Marasmius balingensis | Corner | 1996 |
| Marasmius bambusae | (Pat.) Sacc. & Trotter | 1912 |
| Marasmius bambusiniformis | Singer | 1976 |
| Marasmius bambusinus | Fr. | 1838 |
| Marasmius barbatus | Velen. | 1939 |
| Marasmius barombiensis | Henn. | 1895 |
| Marasmius basicarneus | Corner | 1996 |
| Marasmius bathomphalus | Singer | 1989 |
| Marasmius batistae | Singer | 1965 |
| Marasmius baumannii | Henn. | 1897 |
| Marasmius beelianus | Singer | 1964 |
| Marasmius bekolacongoli | Beeli | 1928 |
| Marasmius bellipes | Morgan | 1905 |
| Marasmius bellus | Berk. | 1856 |
| Marasmius benecystidiatus | Corner | 1996 |
| Marasmius benghalensis | A.K. Dutta & K. Acharya | 2021 |
| Marasmius beniensis | Singer | 1965 |
| Marasmius berambutanus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius berteroi | (Lév.) Murrill | 1915 |
| Marasmius bezerrae | Singer | 1976 |
| Marasmius bingaensis | Singer | 1964 |
| Marasmius bipindeensis | Henn. | 1897 |
| Marasmius boliviae | Singer | 1965 |
| Marasmius bondoi | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius borealis | Gilliam | 1975 |
| Marasmius brachypus | Speg. | 1898 |
| Marasmius brachysporus | Singer | 1989 |
| Marasmius bromeliacearum | Singer | 1952 |
| Marasmius bruchianus | Speg. | 1926 |
| Marasmius brunneicrenulatus | Corner | 1996 |
| Marasmius brunneimarginatus | Corner | 1996 |
| Marasmius brunneinanus | Corner | 1996 |
| Marasmius brunneoaurantiacus | Antonín & Buyck | 2006 |
| Marasmius brunneocinctus | Singer | 1976 |
| Marasmius brunneodiscus | Pegler | 1968 |
| Marasmius brunneolus | (Beeli) Singer | 1964 |
| Marasmius brunneoniger | Antonín & De Kesel | 2013 |
| Marasmius brunneoolivascens | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius brunneospermus | Har. Takah. | 1999 |
| Marasmius brunneostriatus | Petch | 1948 |
| Marasmius bubalinus | Pegler | 1966 |
| Marasmius buchwaldii | Henn. | 1900 |
| Marasmius bulliardii (Dwergwieltje) | Quél. | 1878 |
| Marasmius burkillii | (Massee) Manjula | 1983 |
| Marasmius bururiensis | Antonín | 2003 |
| Marasmius buxi | Fr. | 1872 |
| Marasmius buxicola | Kalamees | 1986 |
| Marasmius buzae | Dennis | 1961 |
| Marasmius buzungolo | Singer | 1964 |
| Marasmius caesius | Murrill | 1940 |
| Marasmius caespitosus | Peck | 1873 |
| Marasmius cafeyen | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius calhouniae | Singer | 1989 |
| Marasmius caliensis | Singer | 1976 |
| Marasmius callicarpellus | Murrill | 1946 |
| Marasmius calopodioides | Henn. | 1899 |
| Marasmius calvocystidiatus | D.L. Komura & J.J. Oliveira | 2016 |
| Marasmius camerunensis | Antonín & Mossebo | 2003 |
| Marasmius campanulatus | Peck | 1872 |
| Marasmius campestris | N.K. Zeng, Zhi Q. Liang & M.S. Su | 2017 |
| Marasmius canalipes | Tkalčecc & Mešić | 2010 |
| Marasmius cantareirensis | J.J. Oliveira | 2016 |
| Marasmius cantharelloides | Henn. | 1897 |
| Marasmius caperatus | Berk. | 1851 |
| Marasmius capitatus | Har. Takah. | 2000 |
| Marasmius carcharus | Singer | 1964 |
| Marasmius caricicola | Kauffman | 1915 |
| Marasmius caricinus | Velen. | 1939 |
| Marasmius carminis | Singer | 1976 |
| Marasmius carneicolor | Corner | 1996 |
| Marasmius carneoniger | Corner | 1996 |
| Marasmius carneotinctus | Singer | 1976 |
| Marasmius carpenterianus | Singer | 1959 |
| Marasmius carpophilus | Singer | 1937 |
| Marasmius caryotae | (Berk.) Petch | 1947 |
| Marasmius cascadensis | Garrido | 1988 |
| Marasmius castaneicolor | Penn. | 1915 |
| Marasmius castaneophilus | I??lo?lu, All?, Solak & Watling | 2009 |
| Marasmius castaneovelutinus | Henn. | 1905 |
| Marasmius castellanoi | Singer | 1976 |
| Marasmius catervatus | Massee | 1892 |
| Marasmius caucasicus | Singer | 1937 |
| Marasmius cavipes | Velen. | 1939 |
| Marasmius cecropiae | Dennis | 1961 |
| Marasmius cecropiformis | Antonín & Hauskn. | 2006 |
| Marasmius celtibericus | G. Moreno & Raitv. | 1998 |
| Marasmius cenospilus | Singer | 1982 |
| Marasmius centroamericanus | Singer | 1989 |
| Marasmius cepistipes | Henn. & E. Nyman | 1899 |
| Marasmius cerussatus | Pat. | 1903 |
| Marasmius chiapasensis | Singer | 1976 |
| Marasmius chordalis | Fr. | 1838 |
| Marasmius chrysoblepharioides | Niveiro & N.A. Ramírez | 2018 |
| Marasmius chrysoblepharis | Singer | 1976 |
| Marasmius chrysocephalus | Singer | 1976 |
| Marasmius cibarius | Singer | 1976 |
| Marasmius ciliatomarginatus | Desjardin | 1989 |
| Marasmius ciliatus | Pegler | 1983 |
| Marasmius cineraceus | Petch | 1948 |
| Marasmius cinereoalbus | Murrill | 1915 |
| Marasmius cinereoflavidus | Henn. | 1901 |
| Marasmius citrinus | Henn. | 1895 |
| Marasmius cladophyllus | Berk. | 1856 |
| Marasmius clitocybiformis | Henn. | 1904 |
| Marasmius coarctatus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius coccineatus | Bat. | 1957 |
| Marasmius cohaerens (Hoornsteeltaailing) | (Pers.) Cooke & Quél. | 1878 |
| Marasmius coklatus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius colimensis | Murrill | 1915 |
| Marasmius collinus | (Scop.) Singer | 1942 |
| Marasmius colorimarginatus | Antonín | 2003 |
| Marasmius conchiformis | J.S. Oliveira & Capelari | 2014 |
| Marasmius confertus | Berk. & Broome | 1873 |
| Marasmius conicoparvus | Antonín, C. Sharp & D. Stubbe | 2013 |
| Marasmius conquistensis | Singer | 1965 |
| Marasmius convoluticeps | Singer | 1976 |
| Marasmius coprophilus | Speg. | 1926 |
| Marasmius corneri | Wannathes, Desjardin & Lumyong | 2007 |
| Marasmius coronatus | Petch | 1916 |
| Marasmius corrugatiformis | Singer | 1964 |
| Marasmius corrugatus | (Pat.) Sacc. & P. Syd. | 1902 |
| Marasmius costaricensis | Singer | 1989 |
| Marasmius crassitunicatus | de Meijer | 2009 |
| Marasmius cremeopileatus | Antonín & C. Sharp | 2006 |
| Marasmius cremeus | Wannathes, Desjardin & Lumyong | 2007 |
| Marasmius crinipes | Antonín, Ryoo & H.D. Shin | 2012 |
| Marasmius crinis-equi | F. Muell. ex Kalchbr. | 1880 |
| Marasmius crispus | Henn. | 1897 |
| Marasmius croceus | G. Stev. | 1964 |
| Marasmius cryptocystidiatus | Corner | 1996 |
| Marasmius cryptomeriae | S. Imai | 1941 |
| Marasmius cryptotrichus | Singer | 1976 |
| Marasmius cuatrecasasii | Singer | 1976 |
| Marasmius culmisedus | Singer | 1952 |
| Marasmius cundinamarcae | Singer | 1976 |
| Marasmius cupreostipes | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius cupulicola | Métrod | 1954 |
| Marasmius curreyi (Oranje grastaailing) | Berk. & Broome | 1879 |
| Marasmius cyaneomarginatus | Corner | 1996 |
| Marasmius cyathula | Henn. | 1895 |
| Marasmius cylindraceocampanulatus | Henn. | 1899 |
| Marasmius cyperinus | Speg. | 1926 |
| Marasmius cyphella | Dennis & D.A. Reid | 1957 |
| Marasmius cyphelloides | Henn. | 1897 |
| Marasmius cyrillaedis | Dennis | 1968 |
| Marasmius cystidiatus | S.A. Sharafudheen & Manim. | 2018 |
| Marasmius cystidioccultus | J.S. Oliveira & Capelari | 2012 |
| Marasmius cystidiophorus | Dennis | 1951 |
| Marasmius cystidiosus | (A.H. Sm. & Hesler) Gilliam | 1976 |
| Marasmius dahlii | Henn. | 1898 |
| Marasmius dasypus | Speg. | 1909 |
| Marasmius dauliporpus | Singer | 1989 |
| Marasmius davidii | Antonín | 2003 |
| Marasmius decens | Herp. | 1912 |
| Marasmius decipiens | Halling, Desjardin & Tish | 1985 |
| Marasmius defibulatus | Singer | 1959 |
| Marasmius deficiens | Corner | 1996 |
| Marasmius delectans | Morgan | 1905 |
| Marasmius delicatulus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius dendrosetosus | Shay & Desjardin | 2017 |
| Marasmius de-tonianus | Sacc. & Cub. | 1887 |
| Marasmius dichromopus | Speg. | 1926 |
| Marasmius dicotyledoneus | (Singer) Singer | 1976 |
| Marasmius dictyocephalus | Desjardin & E. Horak | 1997 |
| Marasmius digilioi | Singer | 1952 |
| Marasmius diminutivus | Y.S. Tan, Desjardin & Vikinesw. | 2009 |
| Marasmius dimiticus | Corner | 1996 |
| Marasmius dimorphus | C. Puccin. & Capelari | 2006 |
| Marasmius discipes | Henn. | 1895 |
| Marasmius discoideus | Henn. | 1895 |
| Marasmius discopus | Massee | 1902 |
| Marasmius dispersus | Corner | 1996 |
| Marasmius disseminatus | Velen. | 1939 |
| Marasmius ditopotrama | Singer | 1965 |
| Marasmius dodecaphyllus | Singer | 1965 |
| Marasmius domesticus | Murrill | 1939 |
| Marasmius dryinus | Singer | 1990 |
| Marasmius dysodes | Singer | 1965 |
| Marasmius ealaensis | Beeli | 1928 |
| Marasmius earlei | Murrill | 1915 |
| Marasmius echinatulus | Singer | 1959 |
| Marasmius echinosphaerus | Singer | 1964 |
| Marasmius echinulatus | (Murrill) Sacc. & Trotter | 1925 |
| Marasmius edodoides | Corner | 1996 |
| Marasmius edwallianus | Henn. | 1900 |
| Marasmius elaeidicola | Henn. | 1901 |
| Marasmius elaeocephalus | Singer | 1964 |
| Marasmius elatus | (Pat.) Sacc. & Trotter | 1912 |
| Marasmius elegans | (Cleland) Grgur. | 1997 |
| Marasmius elegantioides | Bat. | 1952 |
| Marasmius ellipsoidosporus | Ash. Kumar, Singer & S.L. Stephenson | 1991 |
| Marasmius elongatipes | Peck | 1882 |
| Marasmius englerianus | Henn. | 1895 |
| Marasmius eorotula | Singer | 1976 |
| Marasmius epelaeus | Singer | 1965 |
| Marasmius epifagus | Gilliam | 1975 |
| Marasmius epiphylloides (Klimoptaailing) | (Rea) Sacc. & Trotter | 1925 |
| Marasmius epiphyllus (Witte taailing) | (Pers.) Fr. | 1838 |
| Marasmius epirhododendron | Kalamees | 1986 |
| Marasmius episemus | Singer | 1964 |
| Marasmius epodius (Duintaailing) | Bres. | 1887 |
| Marasmius erumpens | Massee | 1898 |
| Marasmius eucladopus | Singer | 1965 |
| Marasmius euosmus | Singer | 1959 |
| Marasmius excentripes | S. Ito & S. Imai | 1939 |
| Marasmius exiguus | Singer | 1969 |
| Marasmius exillimus | Corner | 1996 |
| Marasmius exocarpi | Berk. | 1881 |
| Marasmius eyssartieri | Antonín & Buyck | 2006 |
| Marasmius fagesidus | Velen. | 1947 |
| Marasmius fagi | (Kalamees) Kalamees | 1989 |
| Marasmius falcatipes | Desjardin | 1989 |
| Marasmius farinolens | Corner | 1996 |
| Marasmius fasciculatus | Beeli | 1928 |
| Marasmius favoloides | Henn. | 1895 |
| Marasmius favrei | Antonín | 1991 |
| Marasmius felix | Morgan | 1906 |
| Marasmius ferruginacies | Antonín | 2004 |
| Marasmius ferrugineus | Berk. & Broome | 1869 |
| Marasmius ferruginoides | Antonín | 2004 |
| Marasmius fiardii | Singer | 1983 |
| Marasmius fibrillosipes | Corner | 1996 |
| Marasmius fimetarius | Velen. | 1939 |
| Marasmius fissuratus | Chun Y. Deng, Antonín & T.H. Li | 2015 |
| Marasmius flabellatus | Henn. | 1901 |
| Marasmius flavidulibrunneus | Corner | 1996 |
| Marasmius flavidulus | Henn. | 1901 |
| Marasmius flavus | Singer | 1964 |
| Marasmius fleischerianus | Henn. | 1899 |
| Marasmius flexipes | Manim. & Leelav. | 1987 |
| Marasmius floridanus | Murrill | 1940 |
| Marasmius flotoviophilus | Singer | 1965 |
| Marasmius foliicola | Singer | 1976 |
| Marasmius foliiphilus | Antonín | 2003 |
| Marasmius friesianus | Henn. | 1895 |
| Marasmius fuligineo-ochraceus | J.J. Oliveira | 2016 |
| Marasmius fuligineorotula | Singer | 1965 |
| Marasmius fulvipes | Corner | 1996 |
| Marasmius fulvoferrugineus | Gilliam | 1976 |
| Marasmius fulvovelutinus | Beeli | 1928 |
| Marasmius funiculosus | Corner | 1996 |
| Marasmius furcatus | Velen. | 1939 |
| Marasmius furfuraceus | Killerm. | 1933 |
| Marasmius fuscirugosus | Corner | 1996 |
| Marasmius fusicystidiosus | Antonín, Ryoo & H.D. Shin | 2010 |
| Marasmius fusicystis | Singer | 1952 |
| Marasmius galbinus | T.H. Li & Chun Y. Deng | 2011 |
| Marasmius galeraeformis | Velen. | 1939 |
| Marasmius ganyao | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius geophyllus | Henn. | 1901 |
| Marasmius glabellus | Peck | 1873 |
| Marasmius glaucopus | (Pat.) Sacc. & D. Sacc. | 1905 |
| Marasmius gogolensis | Henn. | 1894 |
| Marasmius gomezii | Singer | 1989 |
| Marasmius goossensiae | Beeli | 1928 |
| Marasmius gracilichorda | Corner | 1996 |
| Marasmius gracilis | J.S. Oliveira | 2020 |
| Marasmius gracillimitenax | Corner | 1996 |
| Marasmius gracillimus | Henn. | 1897 |
| Marasmius graminicola | Speg. | 1898 |
| Marasmius graminipes | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius graminum | (Lib.) Berk. | 1860 |
| Marasmius grandisetulosus | Singer | 1964 |
| Marasmius grandisporus | Henn. | 1897 |
| Marasmius grandiviridis | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius gregarius | Peck | 1896 |
| Marasmius griseoflavus | Henn. | 1901 |
| Marasmius griseofuscescens | Singer | 1976 |
| Marasmius griseoradiatus | Desjardin & Ovrebo | 2006 |
| Marasmius griseoroseus | (Mont.) Singer | 1976 |
| Marasmius griseoviolaceus | Petch | 1948 |
| Marasmius guanacastensis | Singer | 1989 |
| Marasmius guatopoensis | Dennis | 1961 |
| Marasmius guzmanianus | Singer | 1976 |
| Marasmius gypseus | Retn. | 2010 |
| Marasmius haediniformis | Singer | 1964 |
| Marasmius haematocephalus | (Mont.) Fr. | 1838 |
| Marasmius hainanensis | T.H. Li | 1994 |
| Marasmius halimunensis | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius hautefeuillei | Pat. & Demange | 1910 |
| Marasmius hawaiensis | Henn. | 1899 |
| Marasmius heinemannianus | Antonín | 1999 |
| Marasmius heliomyces | Murrill | 1940 |
| Marasmius hellebori-corsici | Romagn. | 1978 |
| Marasmius helvelloides | Henn. & E. Nyman | 1899 |
| Marasmius helvoloides | Singer | 1976 |
| Marasmius hemileucus | (Sacc.) Murrill | 1915 |
| Marasmius hemimycena | Singer | 1965 |
| Marasmius hemisphaericus | Murrill | 1946 |
| Marasmius hendecaphyllus | Singer | 1989 |
| Marasmius herbisedus | Velen. | 1939 |
| Marasmius heterochellus | Singer | 1965 |
| Marasmius hexaphyllus | Singer | 1989 |
| Marasmius highlandsensis | Antonín | 1993 |
| Marasmius hinnuleiformis | Murrill | 1915 |
| Marasmius hioramii | Murrill | 1915 |
| Marasmius hobbitorum | J.S. Oliveira | 2020 |
| Marasmius horridulus | Singer | 1986 |
| Marasmius hortorum | Corner | 1996 |
| Marasmius hudsonii (Hulsttaailing) | (Pers.) Fr. | 1838 |
| Marasmius hyalinotrichus | Singer | 1965 |
| Marasmius hydropodoides | Singer | 1989 |
| Marasmius hygrocybiformis | Chun Y. Deng & T.H. Li | 2012 |
| Marasmius hylaeae | Singer | 1976 |
| Marasmius hylaeicola | Singer | 1976 |
| Marasmius hymeniicephalus | (Sacc.) Singer | 1952 |
| Marasmius idroboi | Singer | 1976 |
| Marasmius iguazuensis | Singer | 1952 |
| Marasmius ilicicola | Desjardin | 1989 |
| Marasmius imitarius | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius inaquosi | Desjardin | 1992 |
| Marasmius incisissimus | Rick | 1961 |
| Marasmius indojasminodorus | A.K. Dutta, K. Acharya & K. Das | 2019 |
| Marasmius indopurpureostriatus | K. Das, A.K. Dutta & K. Acharya | 2015 |
| Marasmius infundibuliformis | Corner | 1996 |
| Marasmius insignis | I. Hino | 1943 |
| Marasmius insipidus | Gilliam | 1975 |
| Marasmius insititius | Fr. | 1838 |
| Marasmius insolitus | Kiyashko & E.F. Malysheva | 2014 |
| Marasmius inthanonensis | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius inundabilis | Singer | 1989 |
| Marasmius inversus | Massee | 1899 |
| Marasmius iodactylus | Singer | 1989 |
| Marasmius ionides | Pat. | 1903 |
| Marasmius iras | Y.S. Tan & Desjardin | 2009 |
| Marasmius izonetae | Singer | 1989 |
| Marasmius jalapensis | Murrill | 1915 |
| Marasmius jamaicensis | Murrill | 1915 |
| Marasmius janauariensis | Singer | 1989 |
| Marasmius jaruensis | Capelari & Maziero | 1988 |
| Marasmius jasminodorus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius jinfoshanensis | Chun Y. Deng & Gafforov | 2021 |
| Marasmius jodocodos | Henn. | 1897 |
| Marasmius juncinus | Velen. | 1927 |
| Marasmius kaernbachii | Henn. | 1898 |
| Marasmius kanchingensis | Y.S. Tan & Desjardin | 2009 |
| Marasmius katangensis | Singer | 1964 |
| Marasmius kembangus | Desjardin & E. Horak | 2000 |
| Marasmius kigwenensis | Antonín | 2003 |
| Marasmius koae | Desjardin & Hemmes | 2011 |
| Marasmius koreanus | Antonín, Ryoo & H.D. Shin | 2012 |
| Marasmius kuthubutheenii | Y.S. Tan, Desjardin, Vikinesw. & N. Abdullah | 2009 |
| Marasmius lacteoides | Antonín | 2003 |
| Marasmius laetus | Rick | 1961 |
| Marasmius lanaripes | Cooke & Massee | 1889 |
| Marasmius lanatus | (Schumach.) Morgan | 1905 |
| Marasmius lapidicola | Velen. | 1939 |
| Marasmius laricinus | Velen. | 1920 |
| Marasmius latepileatus | Antonín & C. Sharp | 2003 |
| Marasmius lateritiosulcatus | S. Ito & S. Imai | 1939 |
| Marasmius lateritius | Petch | 1948 |
| Marasmius laticlavatus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius latiusculospermus | Singer | 1976 |
| Marasmius lebeliae | F.E. Guard | 2020 |
| Marasmius leelavathyi | Manim., Tkalčecc & Mešić | 2010 |
| Marasmius leguminosarum | Singer | 1965 |
| Marasmius leighii | A.H. Sm. | 1979 |
| Marasmius leptopus | Peck | 1903 |
| Marasmius leptus | Singer | 1964 |
| Marasmius leucophaeus | (Sacc.) Petch | 1945 |
| Marasmius leucorotalis | Singer | 1965 |
| Marasmius leucozonites | Singer | 1965 |
| Marasmius leucozonitiformis | Singer | 1976 |
| Marasmius leveilleanus | (Berk.) Sacc. & Trotter | 1925 |
| Marasmius lignicola | Velen. | 1927 |
| Marasmius lilacinitinctus | Mešić & Tkalčecc | 2010 |
| Marasmius lilacinoalbus | Beeli | 1928 |
| Marasmius lilacinostriatus | Henn. | 1895 |
| Marasmius lilacinus | Henn. | 1896 |
| Marasmius limonispora | Kauffman | 1926 |
| Marasmius limosus (Rietwieltje) | Quél. | 1878 |
| Marasmius linderi | Singer | 1948 |
| Marasmius linderioides | J.S. Oliveira & Capelari | 2014 |
| Marasmius liquidambaris | Singer | 1976 |
| Marasmius livistonae | I. Hino | 1943 |
| Marasmius lolema | Beeli | 1928 |
| Marasmius lomatiae | Singer | 1969 |
| Marasmius longibasidiatus | J.S. Oliveira | 2020 |
| Marasmius longicystidiatus | Antonín | 2003 |
| Marasmius longisetosus | J.S. Oliveira & Capelari | 2014 |
| Marasmius longistipitatus | Antonín | 2004 |
| Marasmius longistriatus | Peck | 1906 |
| Marasmius lotaensis | Henn. | 1900 |
| Marasmius louisii | Singer | 1964 |
| Marasmius lovedalensis | Antonín & Verbeken | 2003 |
| Marasmius lubricus | J.S. Oliveira & Cortez | 2016 |
| Marasmius luculentus | A.K. Dutta, K. Acharya & Antonín | 2017 |
| Marasmius ludmilae | Velen. | 1939 |
| Marasmius luteomarginatus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius luteoolivaceus | J.S. Oliveira | 2020 |
| Marasmius luteostipitatus | Mossebo & Antonín | 2004 |
| Marasmius maasii | Singer | 1989 |
| Marasmius macrocystidiosus | Kiyashko & E.F. Malysheva | 2014 |
| Marasmius macrolobieti | Singer | 1964 |
| Marasmius macrosporus | M. Zang | 1979 |
| Marasmius maculosus | Har. Takah. | 2002 |
| Marasmius madagascariensis | Shay & Desjardin | 2017 |
| Marasmius magnificus | (Henn.) Singer | 1945 |
| Marasmius magnisetulosus | Singer | 1976 |
| Marasmius magnisporus | Murrill | 1912 |
| Marasmius magnus | A.C. Magnago & J.S. Oliveira | 2016 |
| Marasmius major | Singer | 1947 |
| Marasmius makok | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius malesianus | Corner | 1996 |
| Marasmius mandaiensis | Corner | 1996 |
| Marasmius manuripiensis | Singer | 1965 |
| Marasmius mapaniae | Corner | 1996 |
| Marasmius maranguensis | Henn. | 1895 |
| Marasmius marasmioides | (Singer) Singer | 1982 |
| Marasmius marthae | Singer | 1959 |
| Marasmius martinii | Singer | 1959 |
| Marasmius masoniae | G. Stev. | 1964 |
| Marasmius masseei | Tkalčecc & Mešić | 2010 |
| Marasmius matangensis | Corner | 1996 |
| Marasmius matrisdei | Singer | 1965 |
| Marasmius maximus | Hongo | 1962 |
| Marasmius mazatecus | Singer | 1976 |
| Marasmius mbalmayoensis | Douanla-Meli | 2008 |
| Marasmius mediterraneus | Corriol | 2007 |
| Marasmius megalospermus | Singer | 1965 |
| Marasmius megistosporus | Singer | 1965 |
| Marasmius megistus | Singer | 1964 |
| Marasmius meliae | J.E. Wright | 1970 |
| Marasmius melinocephalus | Singer | 1965 |
| Marasmius mengoensis | Pegler | 1977 |
| Marasmius mentakiensis | Corner | 1996 |
| Marasmius mesocephalus | Singer | 1989 |
| Marasmius mesosporus | Singer | 1964 |
| Marasmius michailowskoensis | Henn. | 1905 |
| Marasmius microdendron | Singer | 1965 |
| Marasmius microhaedinus | Singer | 1965 |
| Marasmius micromerus | Corner | 1996 |
| Marasmius microrotalis | Singer | 1989 |
| Marasmius midnapurensis | A.K. Dutta, P. Pradhan & K. Acharya | 2014 |
| Marasmius minimus | Dennis | 1961 |
| Marasmius minusculus | Singer | 1989 |
| Marasmius minutissimus | Peck | 1875 |
| Marasmius minutoides | Antonín | 2003 |
| Marasmius mirabilis | Velen. | 1920 |
| Marasmius misionensis | Singer | 1965 |
| Marasmius missangoensis | Pat. | 1902 |
| Marasmius mokfaensis | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius molfinoanus | Speg. | 1926 |
| Marasmius monstruosus | Corner | 1996 |
| Marasmius montagneanus | Singer | 1976 |
| Marasmius montanus | Murrill | 1915 |
| Marasmius morganianus | Sumst. | 1914 |
| Marasmius mulanjeensis | Antonín | 2003 |
| Marasmius multifolius | Peck | 1915 |
| Marasmius multiplex | Corner | 1996 |
| Marasmius multivenosus | Murrill | 1946 |
| Marasmius multivolus | Corner | 1996 |
| Marasmius mundulus | Singer | 1989 |
| Marasmius munsae | Henn. | 1898 |
| Marasmius munyozii | Singer | 1969 |
| Marasmius muramwyanensis | Antonín | 2003 |
| Marasmius musicola | Murrill | 1915 |
| Marasmius musicolor | Y.S. Tan & Desjardin | 2009 |
| Marasmius musisporus | Desjardin & E. Horak | 1997 |
| Marasmius mvumae | Antonín & C. Sharp | 2003 |
| Marasmius myocephalus | Singer | 1976 |
| Marasmius myrciae | (Pat.) Sacc. & P. Syd. | 1902 |
| Marasmius nanorotalis | Singer | 1989 |
| Marasmius nanosporus | Raithelh. | 2004 |
| Marasmius napoensis | Singer | 1976 |
| Marasmius naucoriiformis | Corner | 1996 |
| Marasmius nebularum | Singer | 1965 |
| Marasmius neglectus | Singer | 1976 |
| Marasmius neocrinis-equi | R.A. Koch & Aime | 2020 |
| Marasmius neorotula | Singer | 1989 |
| Marasmius neosessilis | Singer | 1955 |
| Marasmius neotrichotus | Niveiro, N.A. Ramírez & Antonín | 2018 |
| Marasmius neotropicalis | J.S. Oliveira | 2020 |
| Marasmius neotropicus | Mešić & Tkalčecc | 2010 |
| Marasmius nephelogenes | Singer | 1990 |
| Marasmius nexus | Desjardin & E. Horak | 1997 |
| Marasmius nidus-avis | R.A. Koch, N. Siegel & Aime | 2020 |
| Marasmius nigriceps | Corner | 1996 |
| Marasmius nigrodiscus | (Peck) Halling | 1983 |
| Marasmius nigrogriseus | Antonín & Buyck | 2006 |
| Marasmius nilgiriensis | Natarajan & Raman | 1981 |
| Marasmius niveicolor | Murrill | 1915 |
| Marasmius nivicola | Har. Takah. | 2000 |
| Marasmius nocturnus | Har. Takah. | 2000 |
| Marasmius nodulocystis | Pegler | 1977 |
| Marasmius nogalesii | Singer | 1965 |
| Marasmius nolaneiformis | Murrill | 1940 |
| Marasmius notandus | Corner | 1996 |
| Marasmius nothomyrciae | Singer | 1962 |
| Marasmius novopommeranus | Henn. | 1894 |
| Marasmius nummularioides | Desjardin & Y.S. Tan | 2007 |
| Marasmius nuptialis | Morgan | 1905 |
| Marasmius nyikae | Antonín | 2003 |
| Marasmius nymanianus | Henn. | 1899 |
| Marasmius oaxacanus | Singer | 1959 |
| Marasmius obsoletus | Murrill | 1915 |
| Marasmius obtusifolius | Rea | 1920 |
| Marasmius occultatiformis | Antonín, Ryoo & H.D. Shin | 2012 |
| Marasmius occultatus | Har. Takah. | 2000 |
| Marasmius ochraceoniger | Henn. | 1901 |
| Marasmius ochroleucus | Desjardin & E. Horak | 1997 |
| Marasmius ochropoides | Y.S. Tan & Desjardin | 2009 |
| Marasmius ochropus | Singer | 1964 |
| Marasmius octifolius | Murrill | 1946 |
| Marasmius odoratus | V.A. Farook & Manim. | 2015 |
| Marasmius oleiger | Singer | 1965 |
| Marasmius olens | Velen. | 1939 |
| Marasmius oligocystis | Singer | 1959 |
| Marasmius olivascens | Y.S. Tan & Desjardin | 2009 |
| Marasmius olivascenticeps | Singer | 1976 |
| Marasmius omphalinus | (Pat. & Demange) Sacc. & Trotter | 1912 |
| Marasmius onoticus | Singer | 1976 |
| Marasmius opalinus | Massee | 1906 |
| Marasmius opulentus | Har. Takah. | 2000 |
| Marasmius oreades (Weidekringzwam) | (Bolton) Fr. | 1836 |
| Marasmius orientalis | Antonín, Ryoo & H.D. Shin | 2010 |
| Marasmius ornatus | Henn. | 1897 |
| Marasmius pallenticeps | Singer | 1976 |
| Marasmius pallescens | Murrill | 1915 |
| Marasmius pallidibrunneus | J.S. Oliveira | 2020 |
| Marasmius pallidiceps | Murrill | 1946 |
| Marasmius pallidocinctus | Singer | 1976 |
| Marasmius pallidorubens | (Berk. & Broome) Petch | 1945 |
| Marasmius pallidosepiaceus | Henn. | 1901 |
| Marasmius pallidus | Henn. | 1897 |
| Marasmius pallipes | Speg. | 1883 |
| Marasmius palmicola | Henn. | 1895 |
| Marasmius palmivorus | Sharples | 1928 |
| Marasmius paludigenus | Desjardin | 1989 |
| Marasmius pampicola | Singer | 1952 |
| Marasmius panamensis | Singer | 1976 |
| Marasmius pandanicola | Henn. | 1897 |
| Marasmius pandoanus | Singer | 1965 |
| Marasmius panelloides | Corner | 1996 |
| Marasmius panerythrus | Singer | 1965 |
| Marasmius paniformis | Corner | 1996 |
| Marasmius papyraceus | Massee | 1914 |
| Marasmius paradoxus | Henn. | 1895 |
| Marasmius paranaensis | de Meijer | 2009 |
| Marasmius pararotula | Singer | 1965 |
| Marasmius parviconicus | Pegler | 1982 |
| Marasmius patellula | Corner | 1996 |
| Marasmius paucifolius | Murrill | 1915 |
| Marasmius paulensis | Singer | 1976 |
| Marasmius pauxillulus | Corner | 1996 |
| Marasmius peckii | Murrill | 1915 |
| Marasmius pegleri | Courtec. | 1984 |
| Marasmius perakensis | Sacc. & P. Syd. | 1902 |
| Marasmius pergamenus | Pat. & Demange | 1910 |
| Marasmius perlongispermus | Singer | 1976 |
| Marasmius perplexus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius perpusillus | Desjardin & E. Horak | 1997 |
| Marasmius perrarus | Singer | 1989 |
| Marasmius perreductus | Singer | 1977 |
| Marasmius persicinus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius phaeocystis | Singer | 1976 |
| Marasmius phlebodiscus | Desjardin & E. Horak | 1997 |
| Marasmius phyllophilus | Peck | 1907 |
| Marasmius piceinus | Kauffman | 1923 |
| Marasmius pichinchensis | Singer | 1989 |
| Marasmius pilgerodendri | Singer | 1965 |
| Marasmius piperodorus | Beeli | 1928 |
| Marasmius platyspermus | Singer | 1952 |
| Marasmius plenicystidiosus | J.S. Oliveira & Capelari | 2012 |
| Marasmius pleuracanthus | Singer | 1965 |
| Marasmius pleurotelloides | Singer | 1976 |
| Marasmius pleurotellulus | Corner | 1996 |
| Marasmius pleurotoides | Henn. | 1897 |
| Marasmius plicatulus | Peck | 1897 |
| Marasmius plumieri | (Lév.) Singer | 1951 |
| Marasmius pluvialis | Singer | 1965 |
| Marasmius poculiformis | Corner | 1992 |
| Marasmius podocarpicola | Pennycook | 2003 |
| Marasmius polychaetopus | Singer | 1965 |
| Marasmius polycladoides | Singer | 1989 |
| Marasmius polycystis | Singer | 1976 |
| Marasmius polylepidis | Dennis | 1965 |
| Marasmius polyporoides | Murrill | 1915 |
| Marasmius polypus | (Kalchbr.) D.A. Reid | 1975 |
| Marasmius pometiae | Corner | 1996 |
| Marasmius poromycenoides | Singer | 1965 |
| Marasmius porphyreticus | Petch | 1948 |
| Marasmius portentosus | Antonín & De Kesel | 2013 |
| Marasmius portoricensis | Murrill | 1915 |
| Marasmius praeandinus | Singer | 1965 |
| Marasmius praecox | Singer | 1959 |
| Marasmius praegrandispermus | Singer | 1989 |
| Marasmius praetortipes | Murrill | 1915 |
| Marasmius pruinosifolius | Murrill | 1915 |
| Marasmius pruinosipes | Murrill | 1946 |
| Marasmius pseudimpudicus | Murrill | 1946 |
| Marasmius pseudobambusinus | Desjardin | 1991 |
| Marasmius pseudocollinus | (Singer & Digilio ex Singer) Singer | 1965 |
| Marasmius pseudoconfertus | T.H. Li & Chun Y. Deng | 2011 |
| Marasmius pseudocorrugatus | Singer | 1965 |
| Marasmius pseudocupressiformis | Singer | 1989 |
| Marasmius pseudocyphella | Antonín & Buyck | 2006 |
| Marasmius pseudoeuosmus | G.Y. Zheng & Z.S. Bi | 1985 |
| Marasmius pseudoglobularis | Bon | 1978 |
| Marasmius pseudohypochroides | K. Das & Antonín | 2018 |
| Marasmius pseudominutus | Singer | 1989 |
| Marasmius pseudoniveoaffinis | J.S. Oliveira | 2020 |
| Marasmius pseudoniveus | Singer | 1965 |
| Marasmius pseudopellucidus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius pseudoperonatus | Speg. | 1898 |
| Marasmius pseudopurpureostriatus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius pseudoquercophilus | B.E. Lechner & Papin. | 2011 |
| Marasmius pseudosetosus | C. Puccin. & Capelari | 2006 |
| Marasmius pseudotorquescens | Antonín | 2004 |
| Marasmius psychotriophilus | Singer | 1965 |
| Marasmius puberistipitatus | J.J. Oliveira | 2016 |
| Marasmius puerariae | R. Kirschner | 2013 |
| Marasmius pulcherripes | Peck | 1872 |
| Marasmius puniceus | Thiers | 1958 |
| Marasmius purpureipes | Corner | 1996 |
| Marasmius purpureisetosus | Corner | 1996 |
| Marasmius purpureoalbus | Petch | 1948 |
| Marasmius purpureobrunneolus | Henn. | 1899 |
| Marasmius purpureostriatus | Hongo | 1958 |
| Marasmius purpureotinctus | Antonín & P. Roberts | 2013 |
| Marasmius pusilliformis | Chun Y. Deng & T.H. Li | 2017 |
| Marasmius pusillissimus | Desjardin & R.H. Petersen | 1989 |
| Marasmius pusillus | Henn. | 1898 |
| Marasmius pusio | Berk. & M.A. Curtis | 1853 |
| Marasmius puttemansii | Henn. | 1904 |
| Marasmius pygmaeus | Henn. | 1897 |
| Marasmius pyramidalis | (Scop.) Fr. | 1838 |
| Marasmius quercuum | Murrill | 1946 |
| Marasmius quisquiliaris | Schweers | 1941 |
| Marasmius radiatus | Desjardin | 1992 |
| Marasmius radicellicola | Singer | 1976 |
| Marasmius radicicola | Velen. | 1947 |
| Marasmius raffillii | Massee | 1909 |
| Marasmius ramentaceus | (Pat.) Sacc. & Traverso | 1911 |
| Marasmius rammelooi | Antonín | 2004 |
| Marasmius ramulinus | Peck | 1898 |
| Marasmius reniformis | Henn. | 1901 |
| Marasmius resinosus | Sacc. | 1887 |
| Marasmius restrictus | Corner | 1996 |
| Marasmius reticulatus | Henn. | 1901 |
| Marasmius rhabarbarinoides | J.S. Oliveira | 2020 |
| Marasmius rhododendrorum | Kalamees | 1986 |
| Marasmius rhodopurpureus | Antonín, Ryoo & H.D. Shin | 2012 |
| Marasmius rhombisporus | Desjardin & E. Horak | 1997 |
| Marasmius rhyssophyllus | Mont. ex Berk. & M.A. Curtis | 1868 |
| Marasmius riawunnus | Grgur. | 1997 |
| Marasmius rimuphilus | Desjardin & E. Horak | 1997 |
| Marasmius riparius | Singer | 1952 |
| Marasmius robertsii | Antonín | 2004 |
| Marasmius robertsonii | Singer | 1965 |
| Marasmius robinianus | Gilliam | 1976 |
| Marasmius rodwayi | Massee | 1900 |
| Marasmius rongklaensis | Wannathes | 2017 |
| Marasmius rosatus | B.E. Lechner & Papin. | 2011 |
| Marasmius rosellus | Velen. | 1920 |
| Marasmius roseolus | Henn. | 1895 |
| Marasmius rosulatus | Desjardin & R.H. Petersen | 1989 |
| Marasmius rotaliformis | Singer | 1982 |
| Marasmius rotalis | Berk. & Broome | 1873 |
| Marasmius rotaliscystidiatus | C. Puccin. & Capelari | 2007 |
| Marasmius rotula (Wieltje) | (Scop.) Fr. | 1838 |
| Marasmius rotuloides | Dennis | 1951 |
| Marasmius rubefaciens | Corner | 1996 |
| Marasmius ruber | Singer | 1965 |
| Marasmius rubi | Kalamees | 1986 |
| Marasmius rubicola | Velen. | 1939 |
| Marasmius rubiicolor | Corner | 1996 |
| Marasmius rubricatus | (Sacc.) Massee | 1893 |
| Marasmius rubrobrunneus | Shay & Desjardin | 2017 |
| Marasmius rubroflavus | (Theiss.) Singer | 1951 |
| Marasmius rubromarginatus | Dennis | 1951 |
| Marasmius rubrophyllus | Penn. | 1915 |
| Marasmius rubrostipitatus | Antonín & P. Roberts | 2004 |
| Marasmius rufisulcatus | Corner | 1996 |
| Marasmius rufoaurantiacus | Petch | 1948 |
| Marasmius rufobrunneus | Henn. | 1895 |
| Marasmius rufomarginatus | Singer | 1959 |
| Marasmius rufo-ochraceus | Petch | 1948 |
| Marasmius ruforotula | Singer | 1948 |
| Marasmius rufus | Henn. | 1897 |
| Marasmius rugosoelegans | Cleland | 1923 |
| Marasmius sacchari | Wakker | 1896 |
| Marasmius saccharinus | (Batsch) Fr. | 1838 |
| Marasmius salignus | Peck | 1884 |
| Marasmius sancti-xaverii | Singer | 1965 |
| Marasmius sanguineus | Cooke & Massee | 1889 |
| Marasmius sanguirotalis | Singer | 1952 |
| Marasmius sasicola | Har. Takah. | 2002 |
| Marasmius schizochaetus | Desjardin, Retn. & E. Horak | 2000 |
| Marasmius schreursii | Antonín | 2003 |
| Marasmius schultesii | Singer | 1976 |
| Marasmius schweinfurthianus | Henn. | 1893 |
| Marasmius scleronematis | Singer | 1989 |
| Marasmius scopulatus | Desjardin & Ovrebo | 2006 |
| Marasmius scotophysinus | Singer | 1965 |
| Marasmius scototephrodes | Singer | 1976 |
| Marasmius sejunctus | Singer | 1976 |
| Marasmius selangorensis | Y.S. Tan & Desjardin | 2007 |
| Marasmius sepiarius | (Pat. & Demange) Sacc. & Trotter | 1912 |
| Marasmius sepiopileatus | Antonín & P. Roberts | 2013 |
| Marasmius setiger | Pegler | 1977 |
| Marasmius setulosifolius | Singer | 1965 |
| Marasmius setulosus | Murrill | 1940 |
| Marasmius shideiae | Singer | 1989 |
| Marasmius sibiricus | Singer | 1943 |
| Marasmius sicciformis | Murrill | 1940 |
| Marasmius sierraleonis | Beeli | 1938 |
| Marasmius silvicola | Singer | 1952 |
| Marasmius singaporensis | Corner | 1996 |
| Marasmius singeri | Guzmán | 1974 |
| Marasmius skalae | Antonín | 1988 |
| Marasmius sokola | Shay & Desjardin | 2017 |
| Marasmius soliformis | Murrill | 1915 |
| Marasmius somalomoensis | Antonín | 2003 |
| Marasmius sordidus | Massee | 1910 |
| Marasmius spadiceus | Gilliam | 1975 |
| Marasmius spaniophyllus | (Berk.) Sacc. | 1887 |
| Marasmius sparsifolius | Chun Y. Deng & T.H. Li | 2012 |
| Marasmius sphaerodermatoides | Singer | 1989 |
| Marasmius spiculosus | Singer | 1965 |
| Marasmius spinulifer | (Peck) Morgan | 1905 |
| Marasmius spissus | Gilliam | 1975 |
| Marasmius splachnoides | (Hornem.) Fr. | 1838 |
| Marasmius splitgerberi | (Mont.) Singer | 1965 |
| Marasmius staudtii | Henn. | 1895 |
| Marasmius stenophylloides | Murrill | 1946 |
| Marasmius straminiceps | Wannathes, Desjardin & Lumyong | 2007 |
| Marasmius strictipes | (Peck) Singer | 1943 |
| Marasmius strigipes | Beeli | 1928 |
| Marasmius striipileus | Antonín | 2004 |
| Marasmius strobiluriformis | Antonín, Ryoo & H.D. Shin | 2010 |
| Marasmius stuhlmannii | Henn. | 1893 |
| Marasmius subabundans | Chun Y. Deng & T.H. Li | 2012 |
| Marasmius subagricola | (Murrill) Singer | 1976 |
| Marasmius subaimara | Z.S. Bi | 1985 |
| Marasmius subalbiceps | Murrill | 1946 |
| Marasmius subalbidulus | Antonín | 2004 |
| Marasmius subarborescens | Singer | 1964 |
| Marasmius subarchyropus | Murrill | 1940 |
| Marasmius subcaespitosus | Raithelh. | 2004 |
| Marasmius subcastaneus | Henn. | 1897 |
| Marasmius subconiatus | Petch | 1948 |
| Marasmius subcurreyi | Henn. | 1901 |
| Marasmius subdiminutus | Corner | 1996 |
| Marasmius subimpudicus | Henn. | 1901 |
| Marasmius subincarnatus | Corner | 1996 |
| Marasmius subingratus | Dennis | 1951 |
| Marasmius subinstitius | Cleland & Cheel | 1923 |
| Marasmius sublanguidus | Henn. | 1898 |
| Marasmius sublividus | (Murrill) Sacc. & Trotter | 1925 |
| Marasmius submarginatus | Singer | 1989 |
| Marasmius submulticeps | (Murrill) Sacc. & Trotter | 1925 |
| Marasmius subnauseosus | Kauffman | 1926 |
| Marasmius subomphalodes | Henn. | 1901 |
| Marasmius subpilosus | Peck | 1903 |
| Marasmius subplancus | Henn. | 1901 |
| Marasmius subplexifolius | Murrill | 1915 |
| Marasmius subprasiosmus | Murrill | 1940 |
| Marasmius subputtemansii | J.S. Oliveira | 2020 |
| Marasmius subrhodocephalus | Henn. | 1895 |
| Marasmius subroseus | Cooke & Massee | 1892 |
| Marasmius subrotula | Murrill | 1915 |
| Marasmius subruforotula | Singer | 1964 |
| Marasmius subsetiger | Z.S. Bi & G.Y. Zheng | 1985 |
| Marasmius subsynodicus | Murrill | 1940 |
| Marasmius subtangerinus | Antonín, Ryoo & H.D. Shin | 2012 |
| Marasmius subtropicus | A.K. Dutta & K. Acharya | 2021 |
| Marasmius subvenosus | Peck | 1872 |
| Marasmius subvigintifolius | J.S. Oliveira | 2020 |
| Marasmius subviolaceus | Henn. | 1897 |
| Marasmius subviridiphyllus | Chun Y. Deng, Y.H. Yang & T.H. Li | 2013 |
| Marasmius subviscidus | Corner | 1996 |
| Marasmius sulcatus | Massee | 1916 |
| Marasmius superabundans | Murrill | 1945 |
| Marasmius superbus | Henn. | 1901 |
| Marasmius suthepensis | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius sutliffiae | Peck | 1905 |
| Marasmius symbiotes | Theiss. | 1909 |
| Marasmius tageticolor | Berk. | 1856 |
| Marasmius tanaensis | Shay & Desjardin | 2017 |
| Marasmius tanougouensis | Antonín | 2004 |
| Marasmius tantulus | Wannathes, Desjardin & Lumyong | 2009 |
| Marasmius tanyspermus | Singer | 1965 |
| Marasmius tasmaniensis | Singer | 1989 |
| Marasmius tenellulus | Corner | 1996 |
| Marasmius tenuifolius | (Murrill) Singer | 1943 |
| Marasmius tenuisetulosus | (Singer) Singer | 1976 |
| Marasmius tenuisporus | Velen. | 1939 |
| Marasmius tenuissimus | (Sacc.) Singer | 1976 |
| Marasmius tephromelanus | Singer | 1989 |
| Marasmius teplicensis | Antonín & Skála | 1993 |
| Marasmius tereticeps | Singer | 1965 |
| Marasmius terraefirmae | Singer | 1989 |
| Marasmius testaceiceps | Murrill | 1946 |
| Marasmius testaceus | Henn. | 1901 |
| Marasmius tetrachroinus | Singer | 1965 |
| Marasmius tetrachrous | Singer | 1976 |
| Marasmius thailandicus | Wannathes | 2017 |
| Marasmius theobromae | Faber | 1909 |
| Marasmius thujinus | Peck | 1903 |
| Marasmius tibeticus | M. Zang | 1979 |
| Marasmius tinctorius | Massee | 1898 |
| Marasmius titanosporus | D.A. Reid & Jacot Guill. | 1988 |
| Marasmius togoensis | Henn. | 1897 |
| Marasmius tomentosipes | Peck | 1902 |
| Marasmius torquescens (Behaarde roodsteeltaailing) | Quél. | 1872 |
| Marasmius tosensis | Henn. | 1904 |
| Marasmius tremulae | Velen. | 1947 |
| Marasmius trichotus | Corner | 1996 |
| Marasmius tricystidiatus | N.A. Ramírez & N. Niveiro | 2021 |
| Marasmius trigonobalani | Corner | 1996 |
| Marasmius trinitatis | Dennis | 1951 |
| Marasmius tritici | P.A. Young | 1925 |
| Marasmius tropicaerotula | S. Ito & S. Imai | 1939 |
| Marasmius truncigenus | (Raithelh.) Raithelh. | 1985 |
| Marasmius truncorum | Singer | 1989 |
| Marasmius tshopoensis | Antonín | 2003 |
| Marasmius tubulatus | Petch | 1948 |
| Marasmius tucumanus | Singer | 1952 |
| Marasmius tyrius | B.E. Lechner & Papin. | 2011 |
| Marasmius ubiquipallens | Desjardin & E. Horak | 1997 |
| Marasmius udoensis | I. Hino | 1943 |
| Marasmius uliginosus | Gilliam | 1975 |
| Marasmius umbilicatus | Kauffman | 1926 |
| Marasmius umbrinus | Pegler | 1968 |
| Marasmius unilamellatus | Desjardin & E. Horak | 1997 |
| Marasmius ushuaiensis | (Speg.) Raithelh. | 1990 |
| Marasmius ustilago | Singer | 1965 |
| Marasmius vagus | F.E. Guard, M.D. Barrett & Farid | 2020 |
| Marasmius valdivianus | Singer | 1969 |
| Marasmius variabiliceps | Singer | 1965 |
| Marasmius variabilis | Desjardin & Ovrebo | 2006 |
| Marasmius velitaris | Corner | 1996 |
| Marasmius venatifolius | J.S. Oliveira | 2020 |
| Marasmius venezuelanus | Dennis | 1961 |
| Marasmius venosus | Henn. & E. Nyman | 1899 |
| Marasmius ventalloi | Singer | 1947 |
| Marasmius ventallonii | Singer | 1936 |
| Marasmius venustus | I. Hino | 1943 |
| Marasmius vergeliensis | Singer | 1976 |
| Marasmius vialis | Peck | 1898 |
| Marasmius viegasii | Singer | 1957 |
| Marasmius vigintifolius | Singer | 1965 |
| Marasmius vinosus | Speg. | 1909 |
| Marasmius violaceoides | Antonín | 2004 |
| Marasmius violaceus | Henn. | 1897 |
| Marasmius violascens | Velen. | 1947 |
| Marasmius violeorotalis | Singer | 1976 |
| Marasmius viridicarneus | (Berk. & Broome) Pegler | 1986 |
| Marasmius viridis | Desjardin & E. Horak | 1997 |
| Marasmius vitreus | Velen. | 1920 |
| Marasmius vladimirii | A.K. Dutta & K. Acharya | 2014 |
| Marasmius volkensii | Henn. | 1895 |
| Marasmius washingtonensis | Penn. | 1915 |
| Marasmius wettsteinii | Sacc. & P. Syd. | 1899 |
| Marasmius wilsonii | Murrill | 1915 |
| Marasmius wisteriae | Antonín, Ryoo & H.D. Shin | 2014 |
| Marasmius witteanus | Singer | 1964 |
| Marasmius wynneae (Beukentaailing) | Berk. & Broome | 1859 |
| Marasmius xenopellis | Retn. | 2008 |
| Marasmius xerampelinus | Singer | 1976 |
| Marasmius xerophyticus | Singer | 1965 |
| Marasmius xestocephaloides | Antonín | 2004 |
| Marasmius xestocephalus | Singer | 1964 |
| Marasmius xylodendron | Singer | 1989 |
| Marasmius yalae | Singer | 1976 |
| Marasmius yangambiensis | Singer | 1964 |
| Marasmius yanomami | J.S. Oliveira & N.K. Ishikawa | 2019 |
| Marasmius yarizae | Singer | 1965 |
| Marasmius ypyrangensis | J.S. Oliveira | 2020 |
| Marasmius zandbaiensis | Henn. & E. Nyman | 1899 |
| Marasmius zenkeri | Henn. | 1895 |
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Marasmius op Wikispecies