Fossil Bryozoan Heterotrypa subfrondosa

Fossil Bryozoan Heterotrypa subfrondosa are from the Ordovician Period. They are about 450 million years old and were found in Carrol County, Kentucky. Bryozoans are tiny colonial animals. The fossil that you see was the home of thousands of bryozoans. With a magnifying glass you can see tiny pits. Each pit was the home of one bryozoan. They live by filtering sea water for microscopic organisms. There are many different kinds of bryozoans. Lots are extinct but many are living today.