| Summary: | <i>Leptosphaeriaceae</i>, a diverse family in the order <i>Pleosporales</i>, is remarkable for its scleroplectenchymatous or plectenchymatous peridium cells. Four <i>Leptosphaeriaceae</i> species were discovered and studied during the investigation of saprobic fungi from plant substrates in China. Novel taxa were defined using multiloci phylogenetic analyses and are supported by morphology. Based on maximum likelihood (ML) and Bayesian inference (BI) analyses, these isolates represent three novel taxa and one new record within <i>Leptosphaeriaceae</i>. A new genus, <i>Angularia</i>, is introduced to accommodate <i>Angularia xanthoceratis</i>, with a synopsis chart for 15 genera in <i>Leptosphaeriaceae.</i> This study also revealed a new species, <i>Plenodomus changchunensis</i>, and a new record of <i>Alternariaster centaureae-diffusae</i>. These species add to the increasing number of fungi known from China.
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