Fossil hard cystic sea urchin
marine-organisms
fossil
specimen
fossil-hard-cystic-sea-urchin
sea-urchin-fossils
sea-urchin-specimens
hard-cystic-sea-urchin
hard-cystic-sea-urchin-specimen
sea-urchin
3d-model-of-sea-urchin
1
Coin
The copyright of the 3D model belongs to the original author and the material may not be distributed, published, transmitted, copied, rented, resold or compiled in any form.
When viewed from the side, the giant shell of the hard shell sea urchin is conical and has a flat base. The petals are short and wide, which are very prominent and are specifically used for breathing. When alive, there are also tubular feet on the petals, and the bone plates in the walking zone are short and wide. The mouth is located in the center of the lower surface and has 5 obvious protrusions, thus forming a star shape. The anus is located in the posterior side of the upper surface, and the original surface has many short, slender shell needles. The conical shape of young specimens is not obvious. It is common on sandy limestone surfaces in the eastern United States.
