Hello everyone! I have taken a series of photographs of invertebrate shells meant for morphometric measurements (see attached), I want to know if its possible/feasible/not too hard to compute the volume of the shells with the following dimensions: area and length axes obtained from the first photo, curvature radii obtained from the second and third ones, thickness measured by other method. I was thinking maybe there is a way of approximating this shape to a half of a void ellipsoid with a certain thickness. Do you think its possible to tackle this issue? How would you do it?

I have the weight and approximate density of the shells so I can calculate the volume that way, but I'd like to see if the density approximation checks out