Taxonomy, paleoecology, and paleobiogeography of Wenlockian (Silurian) brachiopods of the Cape Phillips formation from Baillie Hamilton Island, Arctic Canada Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/hm50tv776

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  • Eighty-seven brachiopod species are described and illustrated from a brachiopod fauna of the Cape Phillips Formation of Baillie Hamilton Island, Arctic Canada. Two new families, Wangyuiidae and Rhynchotretidae, are proposed. Six new genera and forty-five new species are recognized. New genera comprise: Flabellitesia, Wangyuia, Pseudomendacella, Eoplectodonta (Paranisopleurella), Johnsonatrypa, and Dicoelospirifer. New species include: Ptychopleurella lenzi, Wangyuia thorsteinssoni, Isorthis (Arcualla) jini, I. (A.) walmsleyi, I.(A.) sulcata boreaina, Dicoelosia bailliehamiltonensis, Epitomyonia amplissima, Parmorthina havliceki, Fascizentina rohri, Pseudomendacella boucoti, Dalejina parahanusi, Salopina gamma, S. carinata, Cliftonia contorta, E. (Paranisopleurella) cooperi, Chonetoidea? cocksi, Pentlandina harperi, Liljevallia amorpha, Pholidostrophia (Mesopholidostrophia) lamellosa, P. (M.) salopiensis granti, Morinorhynchus miniparvicostellus, Vosmiverstum breiveli, Severella arctosulcata, Spondylopyxis potteri, Clorinda geniculata, Amsdenina amsdeni, Caryogyps grayi, C. chattertoni, Rhynchotreta americaniformis, "Ancillotoechia" sheehani, Stegerhynchus estonicus cordillerus, Johnsonatrypa imbricata, Spirigerina copperi, Plectatrypa unicosta, P. rongi, Eospinatrypa bassetti, Eospinatrypa? savagei, Reticulatrypa blodgetti, Gracianella dimorpha, Pseudoprotathyris? modzalevskayae, Dicoelospirifer dicoelospirifer, Cyrtia alatiformis, Plicocyrtia jonesi, Spurispirifer hughesi, Spirinella struszi. Graptolites interbedded with the brachiopod fauna indicate a riccartonensis Zone (early Wenlock) age. The fauna is allochthonous and consists of a mixture of both shallow- and deep- water communities. Ten communities are recognized and discussed. The fauna shows a close relationship with the coeval Cordilleran faunas.
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