What is this fruit?

The atemoya is a hybrid of two fruits – the sugar-apple and the cherimoya – which are both native to the American tropics. This fruit is popular in Taiwan, where it is known as the "pineapple sugar apple", so is sometimes wrongly believed to be a cross between the sugar-apple and the pineapple. In Brazil, the atemoya, became popular, and in 2011, around 1,200 hectares of atemoia were cultivated in Brazil.