A mid-Ordovician brachiopod evolutionary hotspot in southern Kazakhstan

Попов, Л. Е.; Cocks, L. Robin M.

doi:10.1002/9781119782377.ch1

Cited by 5 publications

(16 citation statements)

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“…(2009). Its Middle to Upper Ordovician succession was recently characterized by Popov & Cocks (2021), who substantially revised local lithostratigraphy and introduced the Darriwilian to lower Sandbian Berkutsyur Formation and the upper Sandbian to middle Katian Kopkurgan Formation (Fig. 2).…”

Section: Geological and Geographical Settingmentioning

confidence: 90%

“…(2008), Popov et al . (2009) and Popov & Cocks (2021). Trilobite specimens used in the present study were collected by D. T. Tsai and L. E. Popov in 1974 from two isolated localities, c .…”

Section: Geological and Geographical Settingmentioning

confidence: 99%

“…The specimens used in the present study were sampled from eight localities (Fig. 1) situated in three different tectonic settings as characterized by Popov & Cocks (2017, 2021). These are as follows. 1The Sarytuma Fault Zone located along the north‐eastern margin of the Chu‐Ili terrane.…”

Section: Geological and Geographical Settingmentioning

confidence: 99%

“…The unit was deposited along the north‐eastern side of the Dzhalair‐Naiman fault zone on the continental margin, facing the Dzhalair – Naiman marginal basin, separating Chu‐Ili from the North Tien Shan microcontinent (Popov et al . 2009; Popov & Cocks 2021).…”

Section: Geological and Geographical Settingmentioning

confidence: 99%

“…In the Late Ordovician, Chu‐Ili and Mynaral – South Dzhungaria united into a single tectonic unit, separated from the North Tien Shan microcontinent by the Dzhalair – Naiman marginal sea and located in subequatorial southern latitudes in relative proximity to the South China continent (Popov et al . 2009; Popov & Cocks 2021).…”

mentioning

confidence: 99%

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Trilobites of trinucleid, raphiophorid and cyclopygid associations from the Ordovician (Darriwilian – early Katian) of the west Balkhash region and Betpak‐Dala, Central Kazakhstan

Pour

2022

Papers in Palaeontology

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Middle to Late Ordovician (late Darriwilianearly Katian) trilobites from trinucleid, raphiophorid and cyclopygid biofacies are for the first time documented from the West Balkhash and North Betpak-Dala regions in southcentral Kazakhstan. Twenty taxa are described; six of them, that is, Miaopopsis sokyrensis sp. nov., Pricyclopyge keralensis sp. nov., Kongqiaoheia sarytumensis sp. nov., Shumardia karasaiensis sp. nov., Triarthrus akkermensis sp. nov. and Mynaralaspis perforata gen. et sp. nov. are new to science. Six taxa are reported in open nomenclature and two are not identified on a genus level.A new trinucleid Subfamily Nanshanaspinae is designated. Newly discovered faunas show strong links to contemporaneous faunas of Tarim and, to a lesser degree, to those of South China and the Australian sector of Gondwana. Based on results of cluster analysis (Dice similarity), trilobite associations of raphiophorid biofacies from the Chu-Ili and Stepnyak terranes form a single first-order cluster with little similarity to the trilobite associations characteristic of the nielid and illenid-cheirurid biofacies from the Stepnyak and Tarbagatai regions. Also, there is no distinct interaction between the pelagic Degamella-Pricyclopyge association and other trilobite faunas. The geographical distribution of raphiophorid and trinucleid trilobites described in this paper, including species of genera Malongullia?, Miaopopsis, Nanshanaspis and Kongqiaoheia, supports Ordovician palaeogeographical reconstructions showing the Kazakh terranes as part of a huge archipelago situated on both sides of the equator in proximity to the west coast of Gondwana and positioned a considerable distance from the Siberia continent and its associated terranes.

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Section: Geological and Geographical Settingmentioning

confidence: 90%

“…(2008), Popov et al . (2009) and Popov & Cocks (2021). Trilobite specimens used in the present study were collected by D. T. Tsai and L. E. Popov in 1974 from two isolated localities, c .…”

Section: Geological and Geographical Settingmentioning

confidence: 99%

Section: Geological and Geographical Settingmentioning

confidence: 99%

Section: Geological and Geographical Settingmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Trilobites of trinucleid, raphiophorid and cyclopygid associations from the Ordovician (Darriwilian – early Katian) of the west Balkhash region and Betpak‐Dala, Central Kazakhstan

Pour

2022

Papers in Palaeontology

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Ordovician palaeogeography and climate change

2021

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The unusual atrypide brachiopod Qilianotryma suspectum (Popov, 1982) from the Upper Ordovician of the South China paleoplate

2023

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The atrypide brachiopod Qilianotryma Xu in Jin et al., 1979 is an early member of the subfamily Spirigerininae initially described from the Katian (Upper Ordovician) Koumenzi Formation of the Qilian Mountains, Qaidam terrane, Northwest China. Qilianotryma suspectum (Popov in Nikiforova et al., 1982) is described for the first time from the Upper Ordovician of South China paleoplate. Serial sectioning in this study revealed the typical spiralia and other internal structures of early atrypides. The rephotographing of type material and discriminant analysis support that Qilianotryma and broadly similar Euroatrypa can be differentiated in terms of external morphology. The distribution of Qilianotryma across the South China paleoplate, Qaidam terrane, and a few Kazakh terranes (i.e., Chu-Ili, Boshchekul, and Chingiz-Tarbagatai) supports a low-latitude faunal province separate from that of Laurentia and Baltica during the Katian, but further work describing and reviewing additional fossil material from these plates and terranes may improve our understanding of the position of these plates and the role that paleogeography played in increasing biodiversity during the Ordovician Radiation.

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A mid-Ordovician brachiopod evolutionary hotspot in southern Kazakhstan

Cited by 5 publications

References 57 publications

Trilobites of trinucleid, raphiophorid and cyclopygid associations from the Ordovician (Darriwilian – early Katian) of the west Balkhash region and Betpak‐Dala, Central Kazakhstan

Trilobites of trinucleid, raphiophorid and cyclopygid associations from the Ordovician (Darriwilian – early Katian) of the west Balkhash region and Betpak‐Dala, Central Kazakhstan

Ordovician palaeogeography and climate change

The unusual atrypide brachiopod Qilianotryma suspectum (Popov, 1982) from the Upper Ordovician of the South China paleoplate

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