Division Zygomycota. Members of the division Zygomycota are known aszygomycetes. Zygomycetes produce sexual spores known as zygospores (Figure 1), as well as asexual sporangiospores. Figure 1 Sexual reproduction in the mold Rhizopus stolonifer. Plus and minus mycelia produce sexually opposite hyphae that fuse and give rise to zygospores, which germinate to form new mycelia.