Emsian vertebrate microremains from the Zinzilban section, Uzbekistan

Burrow, Carole J.; Ivanov, Alexander; Rodina, O

doi:10.1016/j.palwor.2009.11.004

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…N. costata scales was recorded in the Arabia and some Nostolepis spp. were recorded in the Kazhakstan, Africa and Sibumasu blocks (Blieck et al, 1984, Tông-Dzuy & Janvier, 1994 ; Tông-Dzuy & Janvier, 1990 ; Burrow, Lelièvre & Janjou, 2006 ; Burrow, Ivanov & Rodina, 2010 ; Mergal, Vaškaninová & Žigaite Ž, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Cui

Andreev

et al. 2021

PeerJ

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Based initially on microfossils, Nostolepis is one of the first known ‘acanthodians’, which constitute a paraphyletic assemblage of plesiomorphic members of the total group Chondrichthyes. Its wide distribution has potential implications for stratigraphic comparisons worldwide. Six species of Nostolepis have been reported in China, including one species from the Xitun Formation (Lochkovian, Lower Devonian) of Qujing, eastern Yunnan. Acid preparation of rock samples from the Xitun Formation has yielded abundant acanthodian remains. Based on both morphological and histological examinations, here we identify five species of Nostolepis, including two new species. N. qujingensis sp. nov. is characterized by thin scales devoid of the neck anteriorly and the dentine tubules rarely present in the anterior part of the crown. N. digitus sp. nov. is characterized by parallel ridges on anterior and lateral margins of the crown, and the neck constricted and ornamented with pore openings. We extend the duration of N. striata in China from the Pridoli of Silurian (Yulungssu Formation) to the Lower Devonian in Qujing and report the first occurrences of N. amplifica and N. consueta in this region. This study increases the diversity of the Lower Devonian Xitun Fauna and provides a better understanding of the paleogeographic distribution of Nostolepis.

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Section: Discussionmentioning

confidence: 99%

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Cui

Andreev

et al. 2021

PeerJ

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“…D) from the same area. Similarly shaped plates were referred to Xiejiawanaspis pinus Burrow, Turner & Wang, 2000 from the Emsian of Uzbekistan (Burrow et al, 2010a).…”

Section: Brought To You By | Mit Librariesmentioning

confidence: 99%

Vertebrate Microremains from the Pragian, Emsian and Eifelian of the Prague Basin (Czech Republic)

Mergl

Vaškaninová

Žigaitė

2017

Folia Musei Rerum Naturalium Bohemiae Occidentalis. Geologica Et Paleobiologica

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“…12 in 78 ). eastern part of the Kitab State Geological Reserve, 170 km SSE of Samarkand, situated in the Zeravshan-Gissar Mountains area [18][19][20][21] . The sampled interval is ~ 17 m thick (Figs.…”

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confidence: 99%

Mercury spikes as evidence of extended arc-volcanism around the Devonian–Carboniferous boundary in the South Tian Shan (southern Uzbekistan)

Rakociński

Pisarzowska

Corradini

et al. 2021

Sci Rep

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Recently, the end-Devonian mass extinction (Hangenberg Crisis, 359 Ma) was identified as a first-order mass extinction, albeit not one of the “Big Five” events. Many marine and terrestrial organisms were affected by this crisis. The cause of this mass extinction is still conjectural and widely discussed. Here we report anomalously high mercury (Hg) concentrations from the South Tian Shan (Uzbekistan), together with correlation using conodont biostratigraphic data. Hg enrichment (to 5825 ppb) was detected in marine deposits encompassing the Hangenberg Crisis. In the Novchomok section, the Hangenberg Crisis interval does not contain typical Hangenberg Black Shales; however, by means of inorganic geochemistry (enrichment of redox-sensitive elements such as Mo, V, and U) we detected an equivalent level despite the lack of marked facies changes. This is the first record of Hg and Hg/total organic carbon anomalies in marly shales, marls and carbonates that are totally independent of facies changes, implying that volcanism was the most probable cause of the Hangenberg Crisis. This conclusion is confirmed by the presence of a negative δ13C excursion, which may reflect massive release of isotopically light carbon from volcanogenic and thermogenic devolatilization likely combined with increased arc-volcanism activity worldwide at the end of the Devonian.

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Emsian vertebrate microremains from the Zinzilban section, Uzbekistan

Cited by 6 publications

References 12 publications

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Nostolepisscale remains (stem Chondrichthyes) from the Lower Devonian of Qujing, Yunnan, China

Vertebrate Microremains from the Pragian, Emsian and Eifelian of the Prague Basin (Czech Republic)

Mercury spikes as evidence of extended arc-volcanism around the Devonian–Carboniferous boundary in the South Tian Shan (southern Uzbekistan)

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