Shunosaurus tail club pencil sketch

Pencil sketch of the enigmatic tail "club" of Shunosaurus - formed by the somewhat swollen, globular distalmost caudal vertebrae & (possibly) some spike-like osteoderms. Frustratingly little has been documented on this feature, either in text, illustration or photo. An introduction to the tail club of Shunosaurus can be found at this SVPOW post:

https://svpow.com/2010/06/11/what%E2%80%99s-the-deal-with-your-wacky-tail-club-shunosaurus/

On Twitter I posted a thread of how I think there needs to be a scientific, published review of sauropod tail clubs - which taxa have them, their respective morphologies, and hypothesized functions. Check it out: https://x.com/paleobyliam/status/1973891525085180376