“…Conodonts (Fig. 14) collected from the Subaiyingou section agree well with recently published Ordovician conodont biostratigraphy from Inner Mongolia (Wang et al, 2013a(Wang et al, , 2013b. Conodonts recovered from the lower part of the Sandaokan Formation include Histiodella holodentata Clarke, 1981, Rhipidognathus cf.…”
Section: Cambrian-ordovician Unconformity and Implicationssupporting
confidence: 84%
“…This age for the lower part of the Sandaokan Formation may be slightly older than the age reported by Wang et al (2013a) for the Zhuozishan and lower Kelimoli Formations. Wang et al (2013a) placed the Zhuozishan and lower Kelimoli Formations in the Histiodella kristinae biozone. They defi ned the Histiodella kristinae biozone as containing H. kristinae Stouge, 1984 along with its probable ancestor, H. holodentata, for which the subjacent and globally correlated H. holodentata zone is named.…”
Section: Cambrian-ordovician Unconformity and Implicationsmentioning
confidence: 45%
“…We place the lower part of the Subaiyingou section in the Histiodella holodentata biozone, which is Middle (Zhen et al, 2011). This age for the lower part of the Sandaokan Formation may be slightly older than the age reported by Wang et al (2013a) for the Zhuozishan and lower Kelimoli Formations. Wang et al (2013a) placed the Zhuozishan and lower Kelimoli Formations in the Histiodella kristinae biozone.…”
Section: Cambrian-ordovician Unconformity and Implicationsmentioning
“…Conodonts (Fig. 14) collected from the Subaiyingou section agree well with recently published Ordovician conodont biostratigraphy from Inner Mongolia (Wang et al, 2013a(Wang et al, , 2013b. Conodonts recovered from the lower part of the Sandaokan Formation include Histiodella holodentata Clarke, 1981, Rhipidognathus cf.…”
Section: Cambrian-ordovician Unconformity and Implicationssupporting
confidence: 84%
“…This age for the lower part of the Sandaokan Formation may be slightly older than the age reported by Wang et al (2013a) for the Zhuozishan and lower Kelimoli Formations. Wang et al (2013a) placed the Zhuozishan and lower Kelimoli Formations in the Histiodella kristinae biozone. They defi ned the Histiodella kristinae biozone as containing H. kristinae Stouge, 1984 along with its probable ancestor, H. holodentata, for which the subjacent and globally correlated H. holodentata zone is named.…”
Section: Cambrian-ordovician Unconformity and Implicationsmentioning
confidence: 45%
“…We place the lower part of the Subaiyingou section in the Histiodella holodentata biozone, which is Middle (Zhen et al, 2011). This age for the lower part of the Sandaokan Formation may be slightly older than the age reported by Wang et al (2013a) for the Zhuozishan and lower Kelimoli Formations. Wang et al (2013a) placed the Zhuozishan and lower Kelimoli Formations in the Histiodella kristinae biozone.…”
Section: Cambrian-ordovician Unconformity and Implicationsmentioning
“…However, as has recently been shown by Wang et al . (, figs. 15–16), based on the recorded species ranges it is possible to interpret the McLish–Bromide succession in terms of North American and Baltoscandic conodont zones.…”
Section: The Modern Periodmentioning
confidence: 98%
“…For a modern review of zones recognized in South China, see Zhan & Jin (, p. 91–94), and for a recent discussion, with many references, of Middle and Upper Ordovician Chinese conodont biostratigraphy, see Wang et al . (). Recently, Zhen et al .…”
The long time interval after Pander's (1856) original conodont study can in terms of Ordovician conodont biostratigraphical research be subdivided into three periods, namely the Pioneer Period (1856-1955), the Transition Period (1955-1971) and the Modern Period (1971-Recent). During the pre-1920s, the few published conodont investigations were restricted to Europe and North America and were not concerned about the potential use of conodonts as guide fossils. Although primarily of taxonomic nature, the pioneer studies by Branson & Mehl, Stauffer and Furnish during the 1930s represent the beginning of the use of conodonts in Ordovician biostratigraphy. However, no formal zones were introduced until Lindström (1955) proposed four conodont zones in the Lower Ordovician of Sweden, which marks the end of the Pioneer Period. Because Lindström's zone classification was not followed by similar work outside Baltoscandia, the time interval up to the late 1960s can be regarded as a Transition Period. A milestone symposium volume, entitled 'Symposium on Conodont Biostratigraphy' and published in 1971, summarized much new information on Ordovician conodont biostratigraphy and is taken as the beginning of the Modern Period of Ordovician conodont biostratigraphy. In this volume, the Baltoscandic Ordovician was subdivided into named conodont zones, whereas the North American Ordovician succession was classified into a series of lettered or numbered faunas. Although most of the latter did not receive zone names until 1984, this classification has been used widely in North America. The Middle and Upper Ordovician Baltoscandic zone classification, which was largely based on evolutionary species changes in lineages and hence includes phylozones, has subsequently undergone only minor changes and has been used slightly modified also in some other regions, such as New Zealand, China and eastern North America. The great importance of conodonts in Ordovician biostratigraphy is shown by the fact that conodonts are used for the definition of two of the seven global stages, and seven of the 20 stage slices, now recognized within this system
A total of 5,918 conodonts have been recovered from the upper Hulo Formation and the lower Yenwashan Formation in the Hengdu section, Jiangshan County, Zhejiang Province, south‐eastern China, spanning the interval from the middle Darriwilian to the early Sandbian. Thirty‐three species, belonging to 24 genera, have been identified with three biozones (i.e., the Dzikodus tablepointensis Biozone, the Histiodella kristinae Biozone, and the Pygodus anserinus Biozone) recognized in the region. Using multivariate analysis, the Periodon–Protopanderodus biofacies is recorded from the upper Hulo Formation, and the Periodon–Pygodus biofacies and the Protopanderodus–Baltoniodus biofacies are recorded from the lower Yenwashan Formation. The Periodon–Protopanderodus biofacies and the Periodon–Pygodus biofacies represent a deep‐water environment, such as the margin of the platform and/or slope environment, deeper than that of the Protopanderodus–Baltoniodus biofacies.
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