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Diderma difforme Pers., Tent. disp. meth. fung. 9 (1797) [see pdf]

 

Physarum difforme (Pers.) Link, Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 7:42 (1815) [see pdf] ["1816"]

 

Didymium difforme (Pers.) Duby, Bot. gall., ed. 2, 2:858 (1830) [see pdf] [Comb. superfl., previously proposed by Gray, 1821]

 

Chondrioderma difforme (Pers.) Rostaf., in Fuckel, Jahrb. Nassauischen Vereins Naturk. 27-28:74 (1873) [see pdf]

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Licea caesia Schumach., Enum. pl. 2:219 (1803) [see pdf]

 

Physarum caesium (Schumach.) Fr., Syst. mycol. 3(1):147 (1829) [see pdf] [Non Ph. caesium Shuang L. Chen & Yu Li]

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Amphisporium versicolor Link, Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 7:41 (1815) [see pdf] ["1816"]

 

Didymium versicolor (Link) Léman, Dict. Sci. nat. 13:351 (1819) [see pdf]

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Didymium cyanescens Fr. & Palmquist, Symb.gasteromyc., fasc. 3 :19 (1818) [see pdf] [Other suggested possible synonym of D. difforme (Pers.) Gray (apud martin & Alexopoulos, Myxomycetes 384. 1969)]

 

Diderma cyanescens (Fr. & Palmquist) Fr., Syst. mycol. 3(1):109 (1829) [see pdf]

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Licea alba Nees, in Kunze & Schmidt, Mykol. Hefte 2:66 (1823) [see pdf]

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Lycogala minutum Grev., Scott. crypt. fl. 1(8):pl. 40 (1823) [see pdf] ["minuta"] [Non L. minutum Sacc. & Paol., 1877]

 

Physarum album (Nees) Fr., Syst. mycol. 3(1):147 (1829) [see pdf] [Nom. illeg., non Ph. album (Bull.) Chevall., 1826 nec Ph. album Fuckel, 1865]

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Reticularia pusilla Fr., Syst. orb. veg. 147 (1825) [see pdf]

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Diderma liceoides Fr., Syst. mycol. 3(1):107 (1829) [see pdf] [Other suggested possible synonyms of Didymium difforme (Pers.) Gray, may be the same as the Didymium cyanescens Fr. (Martin & Alexopoulos, Myxomycetes 384. 1969)]

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Licea macrospora Schwein., Trans. Amer. Philos. Soc., new ser. 4(2):258 (1832) [see pdf] ["1834"] [Nom. illeg., non L. macrospora Schumach., 1803]

 

Diderma macrosporum (Schwein.) Kuntze, Revis. gen. pl. 3(3):465 (1898) [see pdf] [Based on Licea macrospora Schwein., 1832. See comments under this species]

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Diderma neesii Corda, Icon. fung. 2:23 (1838) [see pdf] [Cited by Rostafinski, Sluzowce Monogr. 178. 1874, as a synonym of Chondrioderma difforme (Pers.) Rostaf. Corda's pl. 12 fig. 88 suggests a Diderma, rather than a Didymium]

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Diderma libertianum Fresen., Beitr. Mykol. 1:28 (1850) [see pdf]

 

Didymium libertianum (Fresen.) de Bary, Mycetozoen, ed. 2, 124 (1864) [see pdf]

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Chondrioderma liceoides Rostaf., Sluzowce monogr. suppl. 17 (1876) [see pdf]

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Chondrioderma micraspis Speg., Anales Mus. Nac. Hist. Nat. Buenos Aires 6(3):200 (1898) [see pdf] ["1899"]

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Diderma persoonii T. Macbr., N. Amer. Slime-moulds, ed. 1, 96 (1899) [see pdf]

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Didymium tubulatum E. Jahn, Ber. Deutsch. Bot. Ges. 36(10):663 (1919) [see pdf]

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Didymium difforme var. repandum G. Lister, J. Bot. 59:91 (1921) [see pdf] [It may be worthy of recognition as a distinct species in which case Jahn's name (D. tubulatum) would take precedence over G. Lister's varietal designation (apud Martin & Alexopoulos, Myxomycetes 384. 1969)]

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Didymium difforme var. bendelii Ejale, Myxomycetes from south of Nigeria 258 (2010)