Geometric morphometric analysis of P1 element asymmetry in the Late Pennsylvanian conodont Idiognathodus magnificus Stauffer and Plummer 1932

Hogancamp, Nicholas J.; Rosscoe, Steven J.; Barrick, James E.

doi:10.29041/strat.14.1-4.179-196

Cited by 7 publications

(5 citation statements)

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“…It was for this reason that the platform landmark analysis (PLA) for Idiognathodus did not include the end of the carina as a landmark, because the blade was broken in the majority of specimens studied (Hogancamp et al . 2016, 2017; Hogancamp & Barrick 2016). The same landmark was also excluded in Polygnathus for the same reason (Hogancamp & Over 2013).…”

Section: Methodsmentioning

confidence: 99%

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Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Hogancamp

Lambert

et al. 2020

Papers in Palaeontology

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Conodont assemblages from the Bashkirian-Moscovian boundary interval in the Naqing section, South China have been studied in detail. A landmark-based geometric morphometric analysis of the evolution of Diplognathodus ellesmerensis is presented. This analysis helps demonstrate that a distinct new species, D. benderi sp. nov., is the direct evolutionary ancestor of D. ellesmerensis. The potential of using the first appearance datum (FAD) of D. ellesmerensis as the Bashkirian-Moscovian boundary marker is re-evaluated via biostratigraphic correlations of conodonts and other fossil groups between different palaeogeographical basins. The FAD of D. ellesmerensis from within the D. benderi sp. nov.-D. ellesmerensis lineage is an excellent potential marker to recognize a global Bashkirian-Moscovian boundary because of its global distribution, the abundance of supplementary marker species at similar stratigraphical levels, and the close stratigraphic proximity of the FAD to the traditional Bashkirian-Moscovian boundary, thus largely preserving the original concept of the base of the Moscovian Stage.

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Section: Methodsmentioning

confidence: 99%

“…The statistical procedures used in this study are the same as those used by Hogancamp & Barrick (2016, 2018) and Hogancamp et al . (2016, 2017) in their studies of Pennsylvanian Idiognathodus . For completeness, important information is duplicated here.…”

Section: Methodsmentioning

confidence: 99%

Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Hogancamp

Lambert

et al. 2020

Papers in Palaeontology

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“…The oldest species, which occurred during the middle Kasimovian, I. magnificus Stauffer & Plummer, , and I. sweeti Hogancamp & Barrick, , lack an eccentric groove in contrast to the younger more characteristic grooved species (Hogancamp et al . ). The oldest species with an eccentric groove, I. eudoraensis Barrick et al ., , and associated species appear in the middle – late Kasimovian (Hogancamp & Barrick ), and the group reaches its greatest diversity in the early Gzhelian with I. simulator and associated species (Hogancamp et al .…”

Section: Systematic Palaeontologymentioning

confidence: 97%

“…The P 1 element pair is slightly asymmetrical; the dextral element tends to be broader, more triangular in outline, and has a smaller rostral lobe than the sinistral element (Rosscoe ; Hogancamp et al . ). In some specimens there is a slight interruption of the transverse ridges by a weak, narrow groove.…”

Section: Systematic Palaeontologymentioning

confidence: 97%

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Conodont faunas across the Kasimovian–Gzhelian boundary (Late Pennsylvanian) in South China and implications for the selection of the stratotype for the base of the global Gzhelian Stage

Barrick

Hogancamp

et al. 2020

Papers in Palaeontology

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The upper Pennsylvanian Naqing and Narao carbonate successions were deposited in intra-platform slope-to-basinal settings across the Kasimovian-Gzhelian boundary in Guizhou, South China. Conodont faunas consist of a mixture of the endemic taxa of the Idiognathodus luodianensis group and cosmopolitan species of the I. simulator group. The I. luodianensis group includes the new species I. fengtingensis, I. luodianensis, I. naqingensis and I. naraoensis. On platform landmark analysis the species of the I. luodianensis group differ in morphological features from co-occurring species of the I. simulator group. Both groups display similar increasing asymmetry in P 1 element pairs across the Kasimovian-Gzhelian boundary, as recognized on the basis of the first occurrence of I. simulator. Many Kasimovian Idiognathodus species disappear and several Gzhelian species first appear with I. simulator, including two new species of Streptognathodus: S. nemyrovskae and S. zhihaoi. Just below the base of the Gzhelian, carbonate d 13 C falls from 4& to 2& in both sections. The combination of an abrupt faunal turnover immediately above the prominent negative d 13 C excursion might represent an oceanic event in South China, perhaps recognizable on a global scale. One of these two South China sections may be the best location to place the GSSP for the base of the Gzhelian Stage.

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Moscovian–Kasimovian boundary conodont assemblages from the Kalinovo section, Donets Basin, Ukraine

Nemyrovska

2022

PalZ

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Geometric morphometric analysis of P1 element asymmetry in the Late Pennsylvanian conodont Idiognathodus magnificus Stauffer and Plummer 1932

Cited by 7 publications

References 0 publications

Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Conodont faunas across the Kasimovian–Gzhelian boundary (Late Pennsylvanian) in South China and implications for the selection of the stratotype for the base of the global Gzhelian Stage

Moscovian–Kasimovian boundary conodont assemblages from the Kalinovo section, Donets Basin, Ukraine

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