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<i>Umbelopsis ramanniana</i> is one of the most commonly reported species within the genus and an important oleaginous fungus. The morphology of the species varies remarkably in sporangiospores, columellae and chlamydospores. However, phylogenetic analyses based on ITS and nLSU rDNA had previously shown insufficiency in achieving species level identification in the genus <i>Umbelopsis</i>. In this study, by applying a polyphasic approach involving multi-gene (nSSU, ITS, nLSU, <i>act1</i>, MCM7 and <i>cox1</i>) phylogeny, morphology and maximum growth temperature, <i>U. ramanniana</i> sensu lato was revealed as a polyphyletic group and resolved with five novel taxa, namely <i>U</i><i>. curvata</i>, <i>U. dura</i>, <i>U. macrospora</i>, <i>U. microsporangia</i> and <i>U. oblongielliptica</i>. Additionally, a key for all currently accepted species in <i>Umbelopsis</i> was also updated.