﻿AbstractScolecobasidiumis cosmopolitan and includes species that inhabit a wide range of ecosystems including soil, water, air, plant and cold-blooded vertebrates. During a fungal survey from mangrove, strains ofScolecobasidiumoccurring on leaf spots of true mangrove plants,AegicerascorniculatumandAcanthusebracteatus, were isolated from Futian Mangrove in Shenzhen and the Qi’ao-Dangan Island Mangrove in Zhuhai, China. Unlike most species inScolecobasidiumthat produce dark conidia, our strains are characterized by hyaline to pale brown conidia and inconspicuous thread-like sterigmata. Further detailed morphological comparison and multi-locus (LSU,ITS,tub2,tef1-α) phylogenetic analyses revealed these collections as two new taxa, namelyS.acanthisp. nov.andS.aegiceratissp. nov.We further emend the generic description ofScolecobasidium, propose one new combination,S.terrestrecomb. nov., and clarify the taxonomic status ofS.constrictum.