Abstract"Microthyriaceae-like" taxa are fungal epiphytes which appear as black dots on the host surface. The families Micropeltidaceae and Microthyriaceae have been poorly studied, particularly with molecular data, due to the difficulty in obtaining pure cultures. The two families were placed in Microthyriales in many studies based on thyriothecial characters. Two species of Micropeltidaceae (Micropeltis dendrophthoes and M. zingiberacicola ) clustered at the base of Dothideomycetes and were unrelated to Microthyriaceae in previous phylogenetic trees. Their placements were treated as unresolved. We restudied sequence data of Micropeltidaceae and its related strains to clarify the current placement using authentic strains available in GenBank. Phylogenetic analyses generated from maximum likelihood and Bayesian analyses (used ITS, LSU, RPB2, SSU and TEF1 sequence data) including Blast results, indicate that the current placement of Micropeltidaceae is in Ostropales (Lecanoromycetes), although it is not strongly supported. A revised phylogenetic tree for Micropeltidaceae and selected families from Dothideomycetes, Eurotiomycetes, Lecanoromycetes, Leotiomycetes and Sordariomycetes is provided with discussions in this paper.