The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations
International audience Among vertebrates, the sarcopterygians represent a clade characterized by a mono-basal articulation of the fins or limbs to the girdles. This group is subdivided into three extant clades: tetrapods, lungfishes and coelacanths. The latter appeared during the Early Devonian and...
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ftunivartois:oai:HAL:hal-04546648v1 2024-05-12T08:04:42+00:00 The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations Mansuit, Rohan Herbin, Marc Herrel, Anthony Clement, Gael Transformations et Agro-ressources (UT&A) Université d'Artois (UA)-UniLaSalle UniLaSalle Mécanismes Adaptatifs et Evolution (MECADEV) Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS) Evolutionary Morphology of Vertebrates Universiteit Gent = Ghent University (UGENT) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Paris, France 2018-07-09 https://hal.science/hal-04546648 en eng HAL CCSD hal-04546648 https://hal.science/hal-04546648 5th International Palaeontological Congress https://hal.science/hal-04546648 5th International Palaeontological Congress, Jul 2018, Paris, France [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/conferenceObject Conference papers 2018 ftunivartois 2024-04-18T00:05:59Z International audience Among vertebrates, the sarcopterygians represent a clade characterized by a mono-basal articulation of the fins or limbs to the girdles. This group is subdivided into three extant clades: tetrapods, lungfishes and coelacanths. The latter appeared during the Early Devonian and was thought to have disappeared by the end of the Cretaceous. However, two extant coelacanth species are known so far: Latimeria chalumnae, discovered in 1938 in theMozambique Channel and L.menadoensis, discovered in 1995 of Indonesia.The coelacanth clade is well known in the fossil record with more than 40 genus with world-wide occurrences. However, the inner structure of the paired fins is poorly known with only two recored fossil species with preservation of fin endoskeletal elements (Laugia from the Triassic of Greenland, Shoshonia from the Devonian of US). Coelacanths are the nearest living marine relatives of tetrapods. Indeed, the proximal endoskeletal elements of their paired nsand of tetrapod limbs are considered as homologous.The first step of this research project aims to describe the ontogenetic development of pectoral and pelvic fins of Latimeria chalumnae. This study is based on tomographic data (CTscan, Synchrotron, MRI) of a unique ontogenetic series with five different stages. The anatomical description of the endoskeletal elements of fins during the development will be completed by dissection of paired fins of adult specimens. Preliminary results show different allometric growth ratios and ossification rates in the formation of the pectoral and pelvic fins. Comparisons between the developments of proximal endoskeletal elements of paired fins of non-tetrapod sarcopterygians and of limbs of first tetrapods will contribute to a better understanding of the evolutionary steps of the terrestrialisation in vertebrates. Conference Object Greenland Université d'Artois: HAL Greenland |
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Open Polar |
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Université d'Artois: HAL |
op_collection_id |
ftunivartois |
language |
English |
topic |
[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
spellingShingle |
[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] Mansuit, Rohan Herbin, Marc Herrel, Anthony Clement, Gael The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
topic_facet |
[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] |
description |
International audience Among vertebrates, the sarcopterygians represent a clade characterized by a mono-basal articulation of the fins or limbs to the girdles. This group is subdivided into three extant clades: tetrapods, lungfishes and coelacanths. The latter appeared during the Early Devonian and was thought to have disappeared by the end of the Cretaceous. However, two extant coelacanth species are known so far: Latimeria chalumnae, discovered in 1938 in theMozambique Channel and L.menadoensis, discovered in 1995 of Indonesia.The coelacanth clade is well known in the fossil record with more than 40 genus with world-wide occurrences. However, the inner structure of the paired fins is poorly known with only two recored fossil species with preservation of fin endoskeletal elements (Laugia from the Triassic of Greenland, Shoshonia from the Devonian of US). Coelacanths are the nearest living marine relatives of tetrapods. Indeed, the proximal endoskeletal elements of their paired nsand of tetrapod limbs are considered as homologous.The first step of this research project aims to describe the ontogenetic development of pectoral and pelvic fins of Latimeria chalumnae. This study is based on tomographic data (CTscan, Synchrotron, MRI) of a unique ontogenetic series with five different stages. The anatomical description of the endoskeletal elements of fins during the development will be completed by dissection of paired fins of adult specimens. Preliminary results show different allometric growth ratios and ossification rates in the formation of the pectoral and pelvic fins. Comparisons between the developments of proximal endoskeletal elements of paired fins of non-tetrapod sarcopterygians and of limbs of first tetrapods will contribute to a better understanding of the evolutionary steps of the terrestrialisation in vertebrates. |
author2 |
Transformations et Agro-ressources (UT&A) Université d'Artois (UA)-UniLaSalle UniLaSalle Mécanismes Adaptatifs et Evolution (MECADEV) Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS) Evolutionary Morphology of Vertebrates Universiteit Gent = Ghent University (UGENT) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Mansuit, Rohan Herbin, Marc Herrel, Anthony Clement, Gael |
author_facet |
Mansuit, Rohan Herbin, Marc Herrel, Anthony Clement, Gael |
author_sort |
Mansuit, Rohan |
title |
The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
title_short |
The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
title_full |
The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
title_fullStr |
The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
title_full_unstemmed |
The endoskeletal development of pectoral and pelvic fins of the coelacanth Latimeria: an extant model for paleontological interpretations |
title_sort |
endoskeletal development of pectoral and pelvic fins of the coelacanth latimeria: an extant model for paleontological interpretations |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-04546648 |
op_coverage |
Paris, France |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
5th International Palaeontological Congress https://hal.science/hal-04546648 5th International Palaeontological Congress, Jul 2018, Paris, France |
op_relation |
hal-04546648 https://hal.science/hal-04546648 |
_version_ |
1798846929499586560 |