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Chaetosphaeriaceae is a genera-rich and highly diverse group of fungi with a worldwide distribution in terrestrial and aquatic habitats. Eight fresh collections of Chaetosphaeriaceae were obtained during investigations of hyaline-spored hyphomycetes in China and Thailand. Based on morphological characteristics and phylogenetic analysis of a combined LSU and ITS sequence dataset, <i>Chaetosphaeria obovoidea</i>, <i>Codinaea aseptata</i>, <i>Codinaeella hyalina</i>, <i>Dictyochaeta guizhouensis</i> and <i>Paragaeumannomyces guttulatus</i> were introduced as new species, <i>Codinaea terminalis</i> was reported as new host record, and <i>Codinaea dwaya</i> and <i>Phialosporostilbe scutiformis</i> were introduced as new collections. Phylogenetic analysis in this study revealed that <i>Chaetosphaeri</i><i>a</i> was polyphyletic. Detailed descriptions and illustrations of new taxa and identified species are provided, as well as an updated phylogenetic tree to confirm the placements of these eight new collections.