Cherimoya Fruit Shape

[Oolie]

I noticed that the shape of the skin on annonas is often used to refer to the fruit, and it is often used in ways that confuse the fruit identity or cause confusion as to the proper fruit.

I found some info which should help with regards to the name of the fruit related to the shape.

Each fruit can vary in skin category for undetermined reasons (most likely pollen source), but usually the fruit fall into one of the five major categories, or somewhere between two of them.

Some of the info in that link conflicts with info I had found previously.

There appears to be some discrepancy between tuberculate and mammilate.

[SeaWalnut]

I think the different shapes of the fruits might be because there are different annona cherimoya subspecies.
The first ones look like pond apple fruit ( annona glabra) ,the middle ones look like annona squamosa( sugar apple) and the last ones look like soursop in shape.
They could also be hybrids not necesarely subspecies or could it be that the fruits take these shapes because of the climate.Pond apple ( annona glabra ) its more cold hardy and likes wet soil,annona squamosa and soursop are more tropical and like drought.