Do you need to focus on a (e.g., Paleozoic vs. Mesozoic)?
Unlike bivalve mollusks (clams), brachiopod shells are symmetrical across a vertical plane (between the valves) rather than a horizontal plane. brachiopoda
Severely impacted by the end-Permian extinction (~252 Ma), losing most of their diversity. Do you need to focus on a (e
Found worldwide at all depths, though they prefer cool, well-oxygenated, and low-light environments. though they prefer cool