After karyogamy followed by meiosis, spores are produced exogenously in:

Agaricus belongs to Basidiomycetes. In this group, karyogamy and meiosis occur in the basidium to produce four basidiospores exogenously (on the outside of the basidium). Neurospora and Saccharomyces (Ascomycetes) produce spores endogenously in an ascus.