Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine
Ischnacanthiform acanthodian dentigerous jaw bones from the Lower Devonian (Late Lochkovian) of Podolia are described for the first time. One new genus and one new species are established. Podoliacanthus gen. nov. is diagnosed as having small−sized jaw bones, the presence of specific accessory cusps...
Published in: | Acta Palaeontologica Polonica |
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ftzenodo:oai:zenodo.org:996598 2023-05-15T16:29:30+02:00 Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine Voichyshyn, Victor Szaniawski, Hubert 2012-12-01 https://zenodo.org/record/996598 https://doi.org/10.4202/app.2011.0079 unknown https://zenodo.org/record/996598 https://doi.org/10.4202/app.2011.0079 oai:zenodo.org:996598 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article publication-article 2012 ftzenodo https://doi.org/10.4202/app.2011.0079 2023-03-10T22:48:38Z Ischnacanthiform acanthodian dentigerous jaw bones from the Lower Devonian (Late Lochkovian) of Podolia are described for the first time. One new genus and one new species are established. Podoliacanthus gen. nov. is diagnosed as having small−sized jaw bones, the presence of specific accessory cusps/denticles on the medial side of teeth of the lateral tooth row, and groups of denticles forming the lingual tooth row. Podoliacanthus zychi sp. nov. is distinguished in having elongated slender jaw bones and lateral teeth with one medial side denticle. Besides, three species are described in open nomenclature: Podoliacanthus sp. 1, while similar to Podoliacanthus zychi sp. nov., differs in having stronger posterior inclination of the teeth tips and presence of well developed flanges of the teeth, P. sp. 2 has quite robust jaw bones and teeth with two medial side denticles, and Podoliacanthus sp. 3 has small narrow jaw bones and teeth with three medial side denticles. Morphology of the lingual tooth row is considered to be a diagnostic feature of generic and higher taxonomic levels, while accessory medial cusps/denticles of the teeth are regarded as diagnostic features at species level. The new genus also occurs in Upper Silurian or Lower Devonian deposits of North Greenland. Preservation of the jaw bones possibly depends on their secondary mineralization. Article in Journal/Newspaper Greenland North Greenland Zenodo Greenland Acta Palaeontologica Polonica 57 4 879 896 |
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description |
Ischnacanthiform acanthodian dentigerous jaw bones from the Lower Devonian (Late Lochkovian) of Podolia are described for the first time. One new genus and one new species are established. Podoliacanthus gen. nov. is diagnosed as having small−sized jaw bones, the presence of specific accessory cusps/denticles on the medial side of teeth of the lateral tooth row, and groups of denticles forming the lingual tooth row. Podoliacanthus zychi sp. nov. is distinguished in having elongated slender jaw bones and lateral teeth with one medial side denticle. Besides, three species are described in open nomenclature: Podoliacanthus sp. 1, while similar to Podoliacanthus zychi sp. nov., differs in having stronger posterior inclination of the teeth tips and presence of well developed flanges of the teeth, P. sp. 2 has quite robust jaw bones and teeth with two medial side denticles, and Podoliacanthus sp. 3 has small narrow jaw bones and teeth with three medial side denticles. Morphology of the lingual tooth row is considered to be a diagnostic feature of generic and higher taxonomic levels, while accessory medial cusps/denticles of the teeth are regarded as diagnostic features at species level. The new genus also occurs in Upper Silurian or Lower Devonian deposits of North Greenland. Preservation of the jaw bones possibly depends on their secondary mineralization. |
format |
Article in Journal/Newspaper |
author |
Voichyshyn, Victor Szaniawski, Hubert |
spellingShingle |
Voichyshyn, Victor Szaniawski, Hubert Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
author_facet |
Voichyshyn, Victor Szaniawski, Hubert |
author_sort |
Voichyshyn, Victor |
title |
Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
title_short |
Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
title_full |
Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
title_fullStr |
Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
title_full_unstemmed |
Acanthodian Jaw Bones from Lower Devonian Marine Deposits of Podolia, Ukraine |
title_sort |
acanthodian jaw bones from lower devonian marine deposits of podolia, ukraine |
publishDate |
2012 |
url |
https://zenodo.org/record/996598 https://doi.org/10.4202/app.2011.0079 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_relation |
https://zenodo.org/record/996598 https://doi.org/10.4202/app.2011.0079 oai:zenodo.org:996598 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.4202/app.2011.0079 |
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Acta Palaeontologica Polonica |
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57 |
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4 |
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879 |
op_container_end_page |
896 |
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1766019197557538816 |