. Bulletin. Natural history. ORDOVICIAN APPALACHIAN ECOLOGY 31 province III, Hehertella sinuata and Zygospira recuruirostra, only occasionally occur together; they do not occur in any characteristic stratigraphic order as did the species in brachiopod provinces I and II. Gastropoda The distributional pattern of the gastropods is presented in Figure 16. Each of the three gastropod faunal provinces is dominated by species of only one superfamily GASTROPOD ZOOGEOGRAPHY. FIG. 16. A generalized outline of the distribution of the most common gastropod species in the central Appalachian Upper Ordovic
. Bulletin. Natural history. ORDOVICIAN APPALACHIAN ECOLOGY 31 province III, Hehertella sinuata and Zygospira recuruirostra, only occasionally occur together; they do not occur in any characteristic stratigraphic order as did the species in brachiopod provinces I and II. Gastropoda The distributional pattern of the gastropods is presented in Figure 16. Each of the three gastropod faunal provinces is dominated by species of only one superfamily GASTROPOD ZOOGEOGRAPHY. FIG. 16. A generalized outline of the distribution of the most common gastropod species in the central Appalachian Upper Ordovician. The three major gastropod faunal provinces are: I. Pleurotomariid Loxoplocus (Lophospira) spp. Ruedemannia? lirata Sinuopea? II. Bellerophontid Plectonotus? sp. Bucania sp. in. Murchisoniid Murchisonia? Note that in this instance mixing of the faunas in gastropod provinces I and II occurs where overlap takes Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody Museum of Natural History. New Haven, Peabody Museum of Natural History, Yale University
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