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Could it be a poor specimen of a Loquat? It has the colour, size and looks as though it could be pear shaped. Don't know if they grow in that region. Did it have 3 stones in? Just a possibility.
I was thinking loquat too, because I have bought them at Asian markets/grocers in the UK, but wasn't sure about Ecuador.
Some digging around brings up the possibility of naranjilla (Solanum quitoense), but I'm not familiar with this one.
Whatever it is the best way to get confirmation would be with a photo of it cut so that the seeds can be seen as well as the before photo.
I'll try to remember that for the future, but I didn't bring this one home. Thanks
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