A New Species and Three New Records Belonging to <i>Mucorales</i> and <i>Mortierellales</i> from Korea

During an investigation of fungi of the orders <i>Mucorales</i> and <i>Mortierellales</i> in Korea, a new <i>Backusella</i> species, <i>Backusella terrestris</i> sp. nov., and three new records, <i>Entomortierella sugadairana</i>, <i>Mucor nederlandicus</i>, and <i>Poitrasia circinans</i>, were found in soil and freshwater samples. All species are described based on morphological and molecular evidence. <i>Backusella terrestris</i> is characterized by globose or subglobose sporangiospores, a variable (globose, subglobose, oval, or oblong) columellae, chlamydospore production, and a maximum growth temperature of 34 °C. The distinct characteristics of the new species and their closely related species are discussed. An identification key to the <i>Backusella</i> species of Korea is also presented.