乌龟 / Turtle

My ribs help build my shell—your ribcage’s distant relatives tried wearing their architecture outside!
我的肋骨参与建造龟壳——你胸廓的远亲，试过把身体建筑穿到外面！

Sources
The endoskeletal origin of the turtle carapace
https://www.nature.com/articles/ncomms3107
Evolution of the turtle body plan by the folding and creation of new muscle connections.
https://doi.org/10.1126/science.1173826
Development of the turtle plastron, the order-defining skeletal structure.
https://doi.org/10.1073/pnas.1600958113
Species reference
https://en.wikipedia.org/wiki/Turtle

Research context
Turtles show how radically the tetrapod trunk can change: ribs and other bones contribute to the shell. Their development helps explain how major anatomical innovations arise from existing skeletal structures.