claim: The Blue Dog coalition was formed by conservative republicans.
evidence: Protitanichthys is a genus of comparatively large coccosteid arthrodire placoderm from the Middle Devonian of the eastern United States .. genus. genus. coccosteid. coccosteid. arthrodire. arthrodire. placoderm. placoderm. Devonian. Devonian. United States. United States. Fossils are found primarily in the Eifelian-epoch aged Delaware Limestone of Ohio , and the Lower Givetian-aged Rockport Quarry of Michigan. Eifelian. Eifelian. Givetian. Givetian. Ohio. Ohio. Michigan. Michigan