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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 64 (1980)

Issue: 5. (May)

First Page: 799

Last Page: 799

Title: Permian Conodont Biostratigraphy and Paleoecology: ABSTRACT

Author(s): Bruce R. Wardlaw

Article Type: Meeting abstract

Abstract:

Permian conodont faunas are not diverse but yield a wealth of information on biostratigraphy and paleoecology. Pennsylvanian faunas carried over into the Early Permian and became extinct in the late Wolfcampian. At this time the rapidly evolving neostreptognathodid and common neogondolellid stocks arose. Predominately, these two stocks are used to subdivide the Permian.

Through most of the Permian, three ecologic faunas can be recognized: (1) a shallow, nearshore fauna dominated by Hindeodus, (2) an intermediate fauna dominated by Neostreptognathodus or Merrillina, and (3) a far-from-shore fauna dominated by Neogondolella. Some species of Neogondolella varied according to nearness to shore; populations containing higher percentages of individuals with serrated or bumpy margins were nearer to shore, often occurring with Hindeodus.

Early Permian Neogondolella faunas were cosmopolitan. In the middle Permian three provinces of Neogondolella faunas can be recognized: a very endemic west Texas province, a partly endemic Canadian province, and a cosmopolitan Eurasian province. All three provinces consist of stocks that seem to be derived from a common widespread ancestor, Neogondolella idahoensis. Only the Eurasian province faunas persisted into the Triassic. It appears that the basins containing the west Texas and Canadian faunal provinces dried up and their respective faunas died out in the Late Permian.

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