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The Ordovician and Silurian conodonts of Japan: their biostratigraphical and paleobiogeographical significance
Männik, P.; Maekawa, T.; Tanaka, G.; Komatsu, T.; Siveter, D.; Williams, M.; Hints, O.; Vandenbroucke, T.R.A. (2018). The Ordovician and Silurian conodonts of Japan: their biostratigraphical and paleobiogeographical significance. Island Arc 27(6): e12269.
In: Island Arc. Wiley-Blackwell: Hoboken. ISSN 1038-4871; e-ISSN 1440-1738, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Author keywords
    biostratigraphy; conodonts; Japan; Ordovician; Silurian

Auteurs  Top 
  • Männik, P.
  • Maekawa, T.
  • Tanaka, G.
  • Komatsu, T.
  • Siveter, D.
  • Williams, M.
  • Hints, O.
  • Vandenbroucke, T.R.A., meer

    Conodont‐bearing Ordovician and Silurian rocks have a wide geographical distribution in Japan. They are exposed on Honshu, Shikoku, and Kyushu islands. Two recently studied samples from Gionyama, in Kyushu, yield conodont assemblages of Telychian (Distomodus sp., Apsidognathus sp. (cf. A. tuberculatus arcticus), Oulodus cf. rectangulus, Ozarkodina cf. waugoolaensis, Panderodus cf. amplicostatus) and probably the earliest Sheinwoodian (?Distomodus sp. (cf. D. staurognathoides), Ozarkodina sp., Oulodus sp., Walliserodus sp. (cf. Walliserodus sp. nov. c Männik), Panderodus sp.) ages, providing further biostratigraphical constraints for the age of the Gionyama Formation in the Kurosegawa Terrane. Most of the conodont taxa identified have wide paleobiogeographical distribution, but probable occurrence of Oulodus rectangulus, Ozarkodina waugoolaensis, and Panderodus amplicostatus suggests a relationship between Australia, the South China paleocontinent, and the Kurosegawa Terrane of ‘Proto‐Japan’ during the Silurian. These paleogeographic interpretations agree with the existing notions based on rugose corals.

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