Order Secotiales is a specific group of fungi that belongs to the class of Ascomycetes. This order is also known by other names such as the black yeast fungi, the Chaetothyriales, and the Eurotiomycetes. These synonyms are used interchangeably to describe this group of fungi that are characterized by their dark pigmentation, slow growth rate, and ability to grow in extreme environments. The Order Secotiales is of significant importance as it includes several species that have medicinal properties, such as the production of antibiotics and antifungals. Therefore, understanding the different names for this order is essential in comprehending its importance in various scientific research fields.