21. Gus wanted to find every last species of brachiopod , 22. Trilobites and brachiopods in particular were rich and diverse. 23. Brachiopods and bryozoans are also present, as are gastropods ( snails ).24. This hypothesis groups annelids with molluscs and brachiopods in another superphylum, Lophotrochozoa. 25. Fish and crustaceans seem to find brachiopod flesh distasteful. 26. Brachiopod fossils have been useful indicators of climate changes during the Paleozoic era.27. Silurian brachiopods were preserved in the Gate City area at Big Moccasin Gap. 28. Brachiopod fossils of this age were preserved in Dane County, Vernon County.29. About 460 million years ago Wisconsin was still home to brachiopods and trilobites. 30. Later in the period brachiopods , bryozoans, crinoids, and molluscs predominated.
