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Gondolelloides new genus a lower permian conodont genus from western and northern canada


, : Gondolelloides new genus a lower permian conodont genus from western and northern canada. Geological Survey of Canada Bulletin (417): 253-268

The new genus GONDOLELLOIDES and two new species, G. canadensis and G. nahanniensis, are defined on the basis of a very distinctively ornamented segminiplanate element. The species were collected over a wide geographic area in the Canadian Cordillera, as well as in the Canadian and Soviet Arctic. The new genus is known only by its Pa element since co-occuring ramiform elements are sparse and may belong to associated genera; it has not been determined whether Gondolelloides has a platform-only or multimembrate apparatus. Gondolelloides is thought to have evolved from "Gondolella" near the Carboniferous-Permian boundary; in six faunules the two genera occur together and are morphologically similar. Two informal new species of "Gondolella" ("G." n. sp. A and "G." n. sp. B) are described. The new species of Gondolelloides are also commonly associated with species of Neogondolella, Adetognathus and Streptognathodus. Gondolelloides appears to range within a narrow interval in the middle to upper Asselian Stage (Lower Permian), but may range into the Sakmarian.

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