I'd say it looks like the fruit of the Myristica tree
(i.e. nutmeg).
There are several species in the genus Myristica.
The husk and seed in the photo seem rather old and dried out. That might also explain why they feel so light.
In a freshly opened husk around the small brown inner 'nutmeg' seed is a lacy red covering (this probably fell off the seed in the photo once it dried). This delicate aril is dried and ground up and used as a cooking spice called mace.
So you get two different spices from this one fruit - nutmeg and mace.
**For those who are not bakers - these two spices are most often used in the making of pumpkin pie.
-Diane