Discovery of Backusella paraconstricta sp. nov. (Mucorales, Mucoromycota) in an upland forest in northeastern Brazil with an identification key for Backusella from the Americas

During a survey of mucoralean fungi in soil from an upland forest area located Pernambuco, Brazil, strain Backusella (URM 8637) was isolated. Based on morphological, physiological, and molecular data [internal transcribed spacer (ITS) large subunit (LSU) ribosomal DNA regions], it recognized that this differed all other species the genus. Morphologically, new is characterized as forming varied-shaped columellae, including elongated, basally constricted, unisporate (rare) multisporate sporangiola, ellipsoidal sporangiospores. The maximum temperature growth URM 8637 malt extract agar potato dextrose 36 °C. In phylogram, closely related to B. constricta. evidence analyzed datasets, proposed. An updated identification key for Americas provided.