Articulated ammonite
thingiverse
Looking for an example of an ammonite to show my kid, I discovered a multitude of articulated octopus models and numerous ammonite shells. This is my attempt at combining two of these (https://www.thingiverse.com/thing:2432614 and https://www.thingiverse.com/thing:637263) using SketchUp. It was a relatively rushed job and there's some compression of the shell, along with limited freedom of movement for the back limbs. Still, it was enough to create a model for my kid (and one for our small local museum, which has a display case full of fossils and models) and I thought I'd share it with anyone else who's interested. Even better if someone wants to make an improved version! Prints well in PLA without any support but requires a brim to ensure proper adhesion.
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