in taxon results in formation of anatomical entity ascospore reproductive process in single-celled organism ascospore formation Note that ascospores and asci are separate biological structures. The ascus is the structure that contain the ascospores, but the development of the ascus is a different process than the formation of the ascospores themselves; for instance, some mutations affect sporulation without affecting ascus development. For this reason, GO:0030437 ascospore formation and GO:0075317 ascus development are different terms and are not linked. sporulation biological_process ascospore biosynthesis The process in which cells that are products of meiosis acquire the specialized features of ascospores. Ascospores are generally found in clusters of four or eight spores within a single mother cell, the ascus, and are characteristic of the ascomycete fungi (phylum Ascomycota). spore formation GO:0030437 sexual sporulation resulting in formation of a cellular spore cell development anatomical structure formation involved in morphogenesis meiotic cell cycle process Ascomycota