The shark-beds of the Eyam Limestone Formation (Lower Carboniferous, Viséan) of Steeplehouse Quarry, Wirksworth, Derbyshire, UK

Smith, Roy E.; Martill, David M.; Duffin, Christopher J.

doi:10.1016/j.pgeola.2017.04.004

Cited by 8 publications

(7 citation statements)

References 43 publications

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“…The overlying Eyam Limestone Fm is assigned to coral biozone K (Mitchell 1989; uppermost part of RC8 in Belgium). This agrees with the presence of the latest Visean to early Serpukhovian conodont Lochriea mononodosa (Smith et al 2017) and an ammonoid P 2 subzone assemblages in the overlying Eyam Limestone Fm (George et al 1976). The regional correlation of lavas within the Monsal Dale Limstone Fm is less secure above the basal part, since while correlation is possible in the central area using the Litton Tuff (Butcher & Ford 1973) and Cressbrook Dale Lava (Waters et al 2009) Walters & Ineson (1981, their Fig.…”

Section: Volcanics From the British Late Viseansupporting

confidence: 77%

A geomagnetic polarity timescale for the Carboniferous

Hounslow

2021

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The geomagnetic polarity pattern for the Carboniferous is incompletely known, but with the best resolved parts in the Serpukhovian and Bashkirian. Hence, data from both igneous and sedimentary units are also used in an additional polarity bias evaluation. In the Tournaisian to mid Visean interval polarity is mainly derived from palaeopole-type palaeomagnetic studies, allowing identification of polarity bias chrons. Seven polarity bias chrons exist in the Mississippian (MI1nB to MI4nB) with an additional 33 conventional magnetochrons and submagnetochrons (MI4r to MI9r). The Moscovian and Gzhelian polarity is best resolved in magnetostratigraphic studies from the Donets Basin and the southern Urals. Dispute about the reliability of these data is ill-founded, since an assessment of supporting data from palaeopole-type studies suggests that these datasets currently provide the best magnetic polarity data through the Pennsylvanian. Polarity bias assessment indicates a normal polarity bias zone in the Kasimovian. In the Pennsylvanian there are 27 conventional magnetochrons and submagnetochrons (PE1n to CI1r) and one normal polarity bias chron (PE8nB). The Kiaman Superchron begins in the mid Bashkirian, with clear data indicating brief normal polarity submagnetochrons within the Superchron. The magnetochron timescale is calibrated using 31 U-Pb zircon dates and a quantitative Bayesian-based age-scaling procedure.

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Section: Volcanics From the British Late Viseansupporting

confidence: 77%

A geomagnetic polarity timescale for the Carboniferous

Hounslow

2021

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“…The Eurytopic Ctenacanthiforms Cladodus and Saivodus Both Cladodus and Saivodus occurred throughout the early Carboniferous (Mississippian). Saivodus is known from the Viséan to the Serpukhovian of England, Ireland, Scotland, Belgium, Morocco, and the U.S.A. (for summary see Duffin and Ginter, 2006;Ginter et al, 2010;Smith et al, 2017) with an extension of this lineage into the Permian of Arizona (Hodnett et al, 2012), and into the Permian of Kashmir (Kapoor and Sahni, 1971).…”

Section: Discussionmentioning

confidence: 99%

“…Summarizing the distribution pattern of both genera, Saivodus seems to have survived the Mississippian-Pennsylvanian transition and occurred until the Permian whereas Cladodus seemingly disappeared during this transition. Nevertheless, both genera are highly cosmopolitan elasmobranchs, occupying a wide range of environments from lagoonal (Richards et al, 2018), to shallow marine (Agassiz, 1843), shelf (Fischer et al, 2016), and deep marine habitats (Smith et al, 2017) from Eurasia to the North American shelf realm.…”

Section: Discussionmentioning

confidence: 99%

“…Its status is now better defined as a result of recently published species revisions (Ginter et al, 2005;Duffin and Ginter, 2006), which led to a drastic reduction to five valid species plus the recognition of two new genera, Saivodus Duffin andGinter, 2006 andGlikmanius Ginter, Ivanov andLebedev, 2005. Considering reported fossil occurrences from the Eurasian realm, Cladodus appears to have been a common and widely distributed chondrichthyan (Agassiz, 1843;Davis, 1883;Demanet, 1941;Duffin and Ginter, 2006;Ginter and Maisey, 2007;Ginter et al, 2010;Fischer et al, 2016;Richards et al, 2018). Dental material of Cladodus commonly co-occurs with that of Saivodus (Agassiz, 1843;Davis, 1883Davis, , 1884Duffin and Ginter, 2006;Smith et al, 2017), contrasting with Glikmanius, whose teeth are rather rare, with the majority of Eurasian records being reported from the central and east Russian Platform, the Urals, and Russia (Lebedev, 1996;Savitskiy et al, 2000;Ginter et al, 2005Ginter et al, , 2010Ivanov, 2017). In addition, two records of Glikmanius are known from the Viséan of Belgium (Ivanov and Derycke, 2005), plus a single isolated tooth from the lower Permian of Slovenia (Križnar, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Scarce ctenacanthiform sharks from the Mississippian of Austria with an analysis of Carboniferous elasmobranch diversity in response to climatic and environmental changes

Feichtinger

Ivanov

Winkler

et al. 2021

Journal of Vertebrate Paleontology

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The Carboniferous is characterized by drastic climatic and environmental fluctuations, which include multiple phases of glaciation resulting in an icehouse climate. Additionally, dynamic continental reconfigurations forced the contraction of the Rheic Ocean resulting in the closure of the Rheic-Tethyan Gateway, which precluded further faunal exchanges between the North American and Eurasian marine realms. Interestingly, cartilaginous fishes seem to be relatively immune to these drastic climatic and environmental changes. The Eurasian fossil record of Paleozoic sharks is strongly biased towards intensively sampled localities from England, Ireland, Scotland, and the Russian Platform. Here we present rare dental material from the Serpukhovian (early Carboniferous) of Austria, adding new information to the paleogeographic distribution of ctenacanthiform sharks. The new material revealed the first record of the genus Saivodus in Central Europe and allowed us to recognize a new species, Cladodus gailensis sp. nov., and a remnant of fossilized cartilage. In an attempt to identify possible linkages between climatic or environmental fluctuations on shark diversity throughout the Carboniferous, we provide a synopsis of the distribution and diversity of elasmobranchs based on primary literature. This preliminary assessment at genus level indicates two pronounced events of extinction, with the first one occurring during the latest Mississippian and the second one towards the end of the Pennsylvanian. The first extinction event distinctly correlates with the known diversity decline of other marine inhabitants and the second occurred during an unstable period of multiple phases of glaciation.

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“…3.5; Ginter et al, 2015). However, the Surprise Canyon Formation specimen differs from the type specimens in having overall a more robust and shorter lingual torsus than in the type material from the Visean of northern Europe (Ginter et al, 2015; Smith et al, 2017), which is more lingually elongated and slender mesiodistally. MNA V11261 is similar to Thrinacodus ferox Turner, 1982.…”

Section: Systematic Paleontologymentioning

confidence: 91%

Carboniferous chondrichthyan assemblages from the Surprise Canyon and Watahomigi formations (latest Mississippian–Early Pennsylvanian) of the western Grand Canyon, Northern Arizona

Hodnett

Elliott

2018

J. Paleontol.

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Two chondrichthyan assemblages of Late Mississippian/Early Pennsylvanian age are now recognized from the western Grand Canyon of northern Arizona. The latest Serpukhovian Surprise Canyon Formation has yielded thirty-one taxa from teeth and dermal elements, which include members of the Phoebodontiformes, Symmoriiformes, Bransonelliformes, Ctenacanthiformes, Protacrodontoidea, Hybodontiformes, Neoselachii (Anachronistidae), Paraselachii (Gregoriidae, Deeberiidae, Orodontiformes, and Eugeneodontiformes), Petalodontiformes, and Holocephali. The euselachian grade taxa are remarkably diverse with four new taxa recognized here; the Protacrodontidae:Microklomax carrieaenew genus new species andNovaculodus billingsleyinew genus new species, and the Anchronistidae:Cooleyella plateranew species andAmaradontus santuciinew genus new species The Surprise Canyon assemblage also has the youngest occurrence of the elasmobranchClairina, previously only known from the Upper Devonian. The Surprise Canyon Formation represents a nearshore fluvial infilling of karstic channels, followed by a shallow marine bioherm reef, and finally deeper open water deposition. The early Bashkirian Watahomigi Formation represents open marine deposition and contains only two taxa: a new xenacanthiform,Hokomata parvanew genus new species, and the holocephalanDeltodus. The relationship between the Surprise Canyon and Watahomigi chondrichthyan assemblages and other significant coeval chondrichthyan assemblages suggests that there may have been eastern and western distinctions among the Euamerican assemblages during the Serpukhovian due to geographic separation by the formation of Pangea.UUID:http://zoobank.org/54a906b6-4873-4f84-92b5-ca0752de01aa

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The shark-beds of the Eyam Limestone Formation (Lower Carboniferous, Viséan) of Steeplehouse Quarry, Wirksworth, Derbyshire, UK

Cited by 8 publications

References 43 publications

A geomagnetic polarity timescale for the Carboniferous

A geomagnetic polarity timescale for the Carboniferous

Scarce ctenacanthiform sharks from the Mississippian of Austria with an analysis of Carboniferous elasmobranch diversity in response to climatic and environmental changes

Carboniferous chondrichthyan assemblages from the Surprise Canyon and Watahomigi formations (latest Mississippian–Early Pennsylvanian) of the western Grand Canyon, Northern Arizona

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