Here in Denmark (which is quite cold) I sometimes experience no seeds at all in fully developed pods when growing outside, when growing inside there are lots of seeds. My own theory is that poor pollination occurs when night temps are very low and this could lead to very few seeds or none at all. Just my observations, not sure if it's true...
By the way, the unidentified pods in your gallery looks a lot like "Murupi Doce" to me...
By the way, the unidentified pods in your gallery looks a lot like "Murupi Doce" to me...