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Book Chapter

Evolutionary, Ecologic, and Geographic Observations on Conodonts During Their Decline and Extinction

L. Cameron Mosher
L. Cameron Mosher
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January 01, 1972

Geographic, stratigraphic, and ontogenetic differences among Triassic conodonts allow recognition of three groups of conodonts, considered to be phylogenetically distinct: the gladigondolellid group, the neogondolellid group, and the neospathodid-epigondolellid group. Each group consists of platform conodonts with or without nonplatform associates. The gladigondolellid fauna arose from ozarkodinid ancestors in the Lower Triassic, flourished during the Middle Triassic, then disappeared, apparently leaving no record outside the area of the Tethys Seaway. One or both of the other two groups is represented virtually everywhere that marine Triassic rocks occur.

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GSA Special Papers

Conodont Paleozoology

Frank H. T. Rhodes
Frank H. T. Rhodes
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Geological Society of America
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Publication date:
January 01, 1972




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