Anthracispicifer Curvilateralis from Health formation Mississippian Fergusons County Montana
Approximate Size: 1"
Brachiopods are marine animals that secrete a shell consisting of two parts called valves. Their fossils are common in the Pennsylvanian and Permian limestones of eastern Kansas.
Brachiopods first appeared in rocks dating back to the early part of the Cambrian Period, about 525 million years ago.