|A rib cage. All rib cage bones are identical.|
The rib cage bone is an item that can be dropped by many prehistoric creatures upon death or by mining fossil blocks. There is an individual rib cage item for each creature that drops it, but the item texture is always the same.
7.2 UPDATE Edit
Mammals, birds, coelacanths, and nautilus are all lacking rib cage items in this version. Rib cage bones cannot be used to create bonemeal or be analyzed to produce DNA. They can, however, be used in creating rib cage armor, a type of skull armor. Any species of rib cage and vertebrae will work in the crafting recipe, along with vanilla Minecraft bones.
7.3 UPDATE EditOnly nautilus and the three fish are lacking rib cages in this update. These items are still used for skull armor and still cannot create bonemeal, but now they can also be used to acquire DNA in the analyzer.