Journal of Earth Science

, Volume 26, Issue 2, pp 219–223 | Cite as

The case of the Carnian (Triassic) conodont genus Metapolygnathus Hayashi

  • Ali Murat Kiliç
  • Pablo Plasencia
  • Keisuke Ishida
  • Francis Hirsch


Successive evolutionary trends control the genera Paragondolella Mosher and Metapolygnathus Hayashi over the about 20 Ma long Aegean-Tuvalian timespan. In consideration of their evolutionary criteria, these genera have been retained together with Carnepigondolella Kozur and the two new genera proposed herein, Mazzaella (type species M. carnica) and Hayashiella (type species H. nodosa). Mazzaella n. gen. represents a Late Julian side branch of Metapolygnathus, harbouring a platform ornamentation similar to the several million years younger Tuvalian lineage of Carnepigondolella, issued from Hayashiella n. gen. that is intermediary between Metapolygnathus and Carnepigondolella, based on appearance and platform ornamentation.

Key Words

Carnian conodont phylogeny evolutionary trend 


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Copyright information

© China University of Geosciences and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Ali Murat Kiliç
    • 1
  • Pablo Plasencia
    • 2
  • Keisuke Ishida
    • 3
  • Francis Hirsch
    • 4
  1. 1.Department of Geological EngineeringBalıkesir UniversityBalıkesirTurkey
  2. 2.Department of Geology and ICBIBEUniversity of ValenciaBurjassotSpain
  3. 3.Laboratory of Geology, Faculty of SciencesTokushima UniversityTokushimaJapan
  4. 4.Laboratory of Geology, Faculty of SciencesNaruto UniversityNarutoJapan

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