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Amphisphaeriaceous taxa (fungi) are saprobes on decaying wood in terrestrial, mangrove, and freshwater habitats. The generic boundaries of the family have traditionally been based on morphology, and the delimitation of genera has always been challenging. <i>Amphisphaeria</i> species have clypeate ascomata and 1-septate ascospores and a coelomycetous asexual morph. <i>Lepteutypa</i> is different from <i>Amphisphaeria</i> in having eutypoid stromata and more than 1-septate ascospores. These main characters have been used for segregation of <i>Lepteutypa</i> from <i>Amphisphaeria</i> for a long time. However, the above characters are overlapping among <i>Amphisphaeria</i> and <i>Lepteutypa</i> species. Therefore, here we synonymized <i>Lepteutypa</i> under <i>Amphisphaeria</i> based on holomorphic morphology and multigene phylogeny. Further, our cluster analysis reveals the relationship between seven morphological traits among <i>Amphisphaeria</i>/<i>Lepteutypa</i> species and suggests those morphologies are not specific to either genus. Three new species (i.e., <i>Amphisphaeria camelliae</i>, <i>A. curvaticonidia,</i> and <i>A. micheliae</i>) are introduced based on morphology and LSU-ITS-RPB2-TUB2 phylogenies. Furthermore, the monotypic genus <i>Trochilispora</i>, which had been accepted in Amphisphaeriaceae, is revisited and synonymized under <i>Hymenopleella</i> and placed in Sporocadaceae.