Hello, Supersprout, thank you, a very useful list distinguishing various cucurbit species and cultivars. Just one thing:
The FAMILY is CUCURBITACEAE
The GENUS is Cucurbita
The SPECIES are all, as you say, Cucurbita pepo, C. moschata etc.
Sorry....as a botanical illustrator I have illustrated masses of different Cucurbitaceae species for Kew specialists and others, and I had to use these distinctions carefully.