Microstelium hyalinum Pat. and Acrospermum puiggarii Speg., established as non-lichenized fungi in 1899 and 1919, respectively, are conspecific with Gomphillus ophiosporus Kalb & Vězda, a muscicolous lichen described in 1988, widespread and common throughout the Neotropics. This is another example where crustose lichens with reduced thallus morphology have been mistaken for non-lichenized fungi hidden in often obscure and barely known fungal genera, with epithets that have priority over well-established lichen names. The options of conservation or rejection of names are inappropriate to solve this problem, since names currently in use can only be conserved against those rejected at the same time, and each discovery of an earlier epithet requires a conservation and rejection proposal [ICBN Art. 14.4]. Alternative solutions would be conserving names over unlisted synonyms, as currently possible for spermatophyte and bryophyte families [ICBN Art. 14.5], or automatically conserving names in current use under specific conditions as practiced in zoological nomenclature [ICZN Art. 23.9]. Since these options are currently unavailable for species names in botanical nomenclature, and a conservation proposal according to ICBN Art. 14.4 would have little chance of success, the new combination Gomphillus hyalinus (Pat.) Lücking, Kalb & Vězda is introduced.