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A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts

Author:
  • Yanlong Chen
  • Leopold Krystyn
  • Michael J. Orchard
  • Xu Long Lai
  • Sylvain Richoz
Publishing year: 2016-05-01
Language: English
Pages: 235-263
Publication/Series: Papers in Palaeontology
Volume: 2
Issue: 2
Document type: Journal article review
Publisher: John Wiley and Sons Ltd
Additional info: See also: Reply to comments on: A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts. doi: 10.1002/spp2.1052

Abstract english

The taxonomy, diversity, evolutionary lineages, and stratigraphical distributions of Middle and early Late Triassic conodonts are reviewed and re-evaluated. Twenty-five genera are recognized in the Middle and early Late Triassic, including a new genus cited in open nomenclature. Of these, 24 genera are assigned to two families and seven subfamilies. The family Gondolellidae consists of the subfamilies Cornudininae, Epigondolellinae, Neogondolellinae, Novispathodinae, Paragondolellinae and Pseudofurnishiinae. The family Gladigondolellidae is monotypic, consisting of the subfamily Gladigondolellinae. The genus Neostrachanognathus is not assigned to any family or subfamily as its origin is unclear. Conodont provincialism was low in the early Anisian, but from the late Anisian faunistic differences started to increase and became stronger during the early Ladinian, reaching a peak around the mid-Ladinian. Provincialism remained strong until the earliest Carnian and changed to an all-Triassic low in the early Tuvalian. The provincialism between North America and Tethys rebounded on the specific level during the late Tuvalian. Diversities on generic and specific levels have been established, and two major conodont diversity cycles are recognized: the first ranges from the Bithynian (early Anisian) to the Julian (late early Carnian), and the second is restricted to the Tuvalian (late Carnian).

Keywords

  • Geology
  • conodont
  • diversity
  • early Late Triassic
  • evolution
  • Middle Triassic
  • taxonomy

Other

Published
Sylvain Richoz
E-mail: sylvain [dot] richoz [at] geol [dot] lu [dot] se

Senior lecturer

Lithosphere and Biosphere Science

+46 46 222 78 89

Sölvegatan 12, Lund

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