Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia)
A new species of Dunkleosteus, D. tuderensis sp. nov., is named based on an infragnathal from the Famennian of the Tver Region, Russia. CT scanning of the holotype revealed two high-density bony constituents comparable in position and interrelations to components described for coccosteomorph arthrod...
Published in: | Diversity |
---|---|
Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3390/d15050648 |
id |
ftmdpi:oai:mdpi.com:/1424-2818/15/5/648/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/1424-2818/15/5/648/ 2023-08-20T04:08:39+02:00 Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) Oleg A. Lebedev Russell K. Engelman Pavel P. Skutschas Zerina Johanson Moya M. Smith Veniamin V. Kolchanov Kate Trinajstic Valeriy V. Linkevich agris 2023-05-10 application/pdf https://doi.org/10.3390/d15050648 EN eng Multidisciplinary Digital Publishing Institute Phylogeny and Evolution https://dx.doi.org/10.3390/d15050648 https://creativecommons.org/licenses/by/4.0/ Diversity; Volume 15; Issue 5; Pages: 648 arthrodires morphology histology gnathals odontoid oral component para-articular component Bilovo Text 2023 ftmdpi https://doi.org/10.3390/d15050648 2023-08-01T10:01:20Z A new species of Dunkleosteus, D. tuderensis sp. nov., is named based on an infragnathal from the Famennian of the Tver Region, Russia. CT scanning of the holotype revealed two high-density bony constituents comparable in position and interrelations to components described for coccosteomorph arthrodires, supported by the presence of at least two clusters of large vascular canals marking separate arterial supplies. Coccosteomorph and dunkleosteid pachyosteomorphs exhibit similar growth patterns including labio-basal depositions of vascularized bone in the infragnathals and basally in the supragnathals. In contrast to coccosteomorphs, dunkleosteid reinforcement of the occlusal margins occurred via the formation of dense osteonal bone, in parallel with resorption forming extensive lingual fossae. Active bone remodeling proceeded without a complete reworking of the primary osteonal bone structure and the original arrangement of vascular canals. Due to inconsistent anatomical terminology in gnathal elements of dunkleosteid arthrodires, a revised terminology is suggested and new terms are introduced. Text North-Western Russia MDPI Open Access Publishing Diversity 15 5 648 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
arthrodires morphology histology gnathals odontoid oral component para-articular component Bilovo |
spellingShingle |
arthrodires morphology histology gnathals odontoid oral component para-articular component Bilovo Oleg A. Lebedev Russell K. Engelman Pavel P. Skutschas Zerina Johanson Moya M. Smith Veniamin V. Kolchanov Kate Trinajstic Valeriy V. Linkevich Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
topic_facet |
arthrodires morphology histology gnathals odontoid oral component para-articular component Bilovo |
description |
A new species of Dunkleosteus, D. tuderensis sp. nov., is named based on an infragnathal from the Famennian of the Tver Region, Russia. CT scanning of the holotype revealed two high-density bony constituents comparable in position and interrelations to components described for coccosteomorph arthrodires, supported by the presence of at least two clusters of large vascular canals marking separate arterial supplies. Coccosteomorph and dunkleosteid pachyosteomorphs exhibit similar growth patterns including labio-basal depositions of vascularized bone in the infragnathals and basally in the supragnathals. In contrast to coccosteomorphs, dunkleosteid reinforcement of the occlusal margins occurred via the formation of dense osteonal bone, in parallel with resorption forming extensive lingual fossae. Active bone remodeling proceeded without a complete reworking of the primary osteonal bone structure and the original arrangement of vascular canals. Due to inconsistent anatomical terminology in gnathal elements of dunkleosteid arthrodires, a revised terminology is suggested and new terms are introduced. |
format |
Text |
author |
Oleg A. Lebedev Russell K. Engelman Pavel P. Skutschas Zerina Johanson Moya M. Smith Veniamin V. Kolchanov Kate Trinajstic Valeriy V. Linkevich |
author_facet |
Oleg A. Lebedev Russell K. Engelman Pavel P. Skutschas Zerina Johanson Moya M. Smith Veniamin V. Kolchanov Kate Trinajstic Valeriy V. Linkevich |
author_sort |
Oleg A. Lebedev |
title |
Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
title_short |
Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
title_full |
Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
title_fullStr |
Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
title_full_unstemmed |
Structure, Growth and Histology of Gnathal Elements in Dunkleosteus (Arthrodira, Placodermi), with a Description of a New Species from the Famennian (Upper Devonian) of the Tver Region (North-Western Russia) |
title_sort |
structure, growth and histology of gnathal elements in dunkleosteus (arthrodira, placodermi), with a description of a new species from the famennian (upper devonian) of the tver region (north-western russia) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/d15050648 |
op_coverage |
agris |
genre |
North-Western Russia |
genre_facet |
North-Western Russia |
op_source |
Diversity; Volume 15; Issue 5; Pages: 648 |
op_relation |
Phylogeny and Evolution https://dx.doi.org/10.3390/d15050648 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/d15050648 |
container_title |
Diversity |
container_volume |
15 |
container_issue |
5 |
container_start_page |
648 |
_version_ |
1774721047504879616 |