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Palaeocycloceras is a
genus of
Middle Ordovician orthocerids from the
Baltic region of Europe, China, and Brazil.
Walter Sweet in 1964 ****igned Palaeocycloceras...
- †Oxygonioceras †Oxynautilus †Pachendoceras †Pachtoceras †Pakrioceras †
Palaeocycloceras †Palaskensis †Palelialia †Palmeroceras †Pancornus †Pantoioceras †Paquettoceras...
