Ascosphaera

Ascosphaera is a genus of fungi within the Ascomycota phylum. These fungi are characterized by the formation of spherical or subspherical fruiting bodies called ascocarps. Within each ascocarp, numerous ascospores are produced, typically in sacs called asci. The genus is notable for its association with insects, particularly bees. Several species of Ascosphaera are known to cause chalkbrood disease in honeybee larvae. This disease manifests as mummified larvae that are hard and chalky in appearance, ranging in color from white to gray or black depending on the species. The spores of Ascosphaera are highly resilient and can persist in the environment, posing a long-term threat to bee colonies. While some species are pathogenic, others are saprophytic, meaning they obtain nutrients from dead organic matter. The taxonomy of Ascosphaera has undergone revisions, and its placement within the Ascomycota reflects its unique morphological and biological characteristics. Research continues to explore the life cycles, ecological roles, and disease-causing mechanisms of these fascinating fungi.