Bryozoan astogeny and evolutionary novelities; their role in the origin and systematics of the Ordovician monticuliporid trepostome genus Peronopora

Cincinnatian Bryozoa Decorah Shale Kentucky Lexington Limestone Invertebrata Indiana Middle Ordovician Minnesota Ohio River valley Kope Formation paleontology Paleozoic Ohio Ordovician Trepostomata United States Whitewater Formation Upper Ordovician