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TitleA review of the evolution, biostratigraphy, provincialism, and diversity of Middle and early Late Triassic conodonts
 
AuthorChen, Y; Krystyn, L; Orchard, M JORCID logo; Lai, X-L; Richoz, S
SourcePapers in Palaeontology vol. 2, issue 2, 2016 p. 235-263, https://doi.org/10.1002/spp2.1038
LinksData/données, Dryad Digital Repository
Image
Year2016
Alt SeriesEarth Sciences Sector, Contribution Series 20160089
PublisherWiley-Blackwell
Documentserial
Lang.English
Mediapaper; on-line; digital
File formathtml; pdf
Subjectsstratigraphy; paleontology; conodonts; biostratigraphy; biotic diversification; Middle Triassic; Upper Triassic; Anisian; Ladinian; Carnian; systematic paleontology; Triassic
ProgramGSC Pacific Division
Released2015 12 01
AbstractThe 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).
Summary(Plain Language Summary, not published)
The taxonomy, diversity, evolutionary lineages, and stratigraphic distributions of Middle and early Late Triassic conodonts is reviewed and re-evaluated. Twenty-five genera are recognized and are assigned to two families and seven subfamilies. The stratigraphic range and phyletic relationships of all genera and species are summarized in figures. Conodont provincialism is low early in the Anisian stage, but increases to reach a peak around the middle of the Ladinian stage, and then decreases to an all-Triassic low early in the Late Carnian stage. The provincialism between North America and Tethys rebounds on the specific level during the late Late Carnian. Conodont genera and species show two major diversity cycles, the first ranging from the Early Anisian to the late Early Carnian, and the second restricted to the late Late Carnian.
GEOSCAN ID298851

 
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