New treasures in <i>Cordycipitaceae</i>: Fungicolous fungi associated with <i>Pseudocercospora fijiensis</i> and <i>P. musae</i> in Brazil, including <i>Matutinistella gen. nov.</i>

<i>Cordycipitaceae</i> is a large family belonging to the order <i>Hypocreales</i>, including cosmopolitan species found on different substrates. This family includes species with different lifestyles such as entomopathogenic, endophytic, and mycoparasitic fungi. Some mycoparasitic species in this family attack phytopathogenic fungi. We identified species of <i>Cordycipitaceae</i> found during a survey of fungicolous fungi associated with <i>Pseudocercospora fijiensis</i> and <i>P. musae</i> in Brazil. Based on morphological characters combined with phylogenetic analysis of ITS, LSU, SSU<i>, RPB1, RPB2,</i> and <i>TEF1-α</i>, we propose a new genus in <i>Cordycipitaceae</i>, namely <i>Matutinistella,</i> with its type species <i>M. brasiliensis,</i> and a new species of the genus <i>Simplicillium,</i> namely <i>S. pseudocercosporicola.</i> Furthermore, we report <i>P. fijiensis</i> as a new host of the mycoparasitic fungus <i>Simplicillium lanosoniveum.</i> In this study we newly report fungicolous fungi of <i>Cordycipitaceae</i> associated with the causal agents of Black Sigatoka and Yellow Sigatoka on banana crops. We provide relevant information for future work involving control measures for these diseases that cause major losses in banana crops. <b>Citation</b>: Custódio FA, Pereira OL (2025). New treasures in <i>Cordycipitaceae</i>: Fungicolous fungi associated with <i>Pseudocercospora fijiensis</i> and <i>P. musae</i> in Brazil, including <i>Matutinistella gen. nov. Fungal Systematics and Evolution</i> <b>15</b>: 133-152. doi: 10.3114/fuse.2025.15.06.