Evolutionary trends and pattern of extinction of Triassic conodonts
Jerzy Trammer
Acta Palaeontologica Polonica 19 (2), 1974: 251-264
Heterochroneous parallellism in the evolution of different lines of platform conodonts from the Ladinian of German Basin and the Norian of the Tethys has been recognized. In both cases similar aberrant types, were gradually produced. The platform conodonts disappeared much earlier than the branched ones in both areas, which is interpreted by a higher survivorship of the latter, less specialized forms.
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