Ascomycetes: (adj. ascomycetous)
a group of fungi, also called the Ascomycotina, that produces sexual spores (ascospores) within a saclike structure called an ascus
(A: ascogonium + antheridium; C: dikaryotic mycelium; D: crozier hook; G: karyogamy; H: meiosis; I: mitosis; J: ascus with ascospores)