Accepted name

Didymium umbilicatum D. Wrigley, Lado & Estrada, Mycologia 100(6):922 (2008) [see pdf]

[Moreno et al., Bol. Soc. Micol. Madrid 36:69-71. 2012, considered this species synonym of Didymium mexicanum G. Moreno, Lizárraga & Illana]