The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda)
The phylogenetic relation between Clio pyramidata Linnaeus, 1767, and Cymbulia peroni De Blainville, 1818, has been studied with regard to the structure of their muscle systems. Specimens of both species collected from the North Atlantic Ocean and the Mediterranean were sectioned 5 μm thick and stai...
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crbrillap:10.1163/26660644-04802002 2023-05-15T17:33:16+02:00 The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) With a note on the phylogeny of both species Pafort-van Iersel, Trudy van der Spoel, S. 1979 http://dx.doi.org/10.1163/26660644-04802002 https://brill.com/view/journals/btd/48/2/article-p111_2.xml https://brill.com/downloadpdf/journals/btd/48/2/article-p111_2.xml unknown Brill Bijdragen tot de Dierkunde volume 48, issue 2, page 111-126 ISSN 0067-8546 2666-0644 General Earth and Planetary Sciences General Environmental Science journal-article 1979 crbrillap https://doi.org/10.1163/26660644-04802002 2022-12-11T12:48:43Z The phylogenetic relation between Clio pyramidata Linnaeus, 1767, and Cymbulia peroni De Blainville, 1818, has been studied with regard to the structure of their muscle systems. Specimens of both species collected from the North Atlantic Ocean and the Mediterranean were sectioned 5 μm thick and stained with Haematoxilin-Eosin, Crossmon or Azan for histological purposes or they were studied as cleared dissected or entire animals. The columellar muscle and subectodermal wing muscles of both species are described. It is concluded that Clio shows neoteny since it develops without metamorphosis. The asymmetry in anatomy proves that both Clio and Cymbulia descend from spiralised ancestors. For Clio two primitive characters are discussed which may be due to the “larval stage” of the adult but which also affirm the possible relation of molluscs to a coelenterate-like ancestor. Original structures found in Cymbulia are also discussed in the light of a possible phylogenetic relation between Thecosomata and Coelenterata, more in particular Conulata. Article in Journal/Newspaper North Atlantic Brill (via Crossref) Bijdragen tot de Dierkunde 48 2 111 126 |
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General Earth and Planetary Sciences General Environmental Science |
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General Earth and Planetary Sciences General Environmental Science Pafort-van Iersel, Trudy van der Spoel, S. The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
The phylogenetic relation between Clio pyramidata Linnaeus, 1767, and Cymbulia peroni De Blainville, 1818, has been studied with regard to the structure of their muscle systems. Specimens of both species collected from the North Atlantic Ocean and the Mediterranean were sectioned 5 μm thick and stained with Haematoxilin-Eosin, Crossmon or Azan for histological purposes or they were studied as cleared dissected or entire animals. The columellar muscle and subectodermal wing muscles of both species are described. It is concluded that Clio shows neoteny since it develops without metamorphosis. The asymmetry in anatomy proves that both Clio and Cymbulia descend from spiralised ancestors. For Clio two primitive characters are discussed which may be due to the “larval stage” of the adult but which also affirm the possible relation of molluscs to a coelenterate-like ancestor. Original structures found in Cymbulia are also discussed in the light of a possible phylogenetic relation between Thecosomata and Coelenterata, more in particular Conulata. |
format |
Article in Journal/Newspaper |
author |
Pafort-van Iersel, Trudy van der Spoel, S. |
author_facet |
Pafort-van Iersel, Trudy van der Spoel, S. |
author_sort |
Pafort-van Iersel, Trudy |
title |
The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
title_short |
The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
title_full |
The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
title_fullStr |
The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
title_full_unstemmed |
The Structure of the Columellar Muscle System in Clio Pyramidata and Cymbulia Peroni (Theocosomata, Gastropoda) |
title_sort |
structure of the columellar muscle system in clio pyramidata and cymbulia peroni (theocosomata, gastropoda) |
publisher |
Brill |
publishDate |
1979 |
url |
http://dx.doi.org/10.1163/26660644-04802002 https://brill.com/view/journals/btd/48/2/article-p111_2.xml https://brill.com/downloadpdf/journals/btd/48/2/article-p111_2.xml |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Bijdragen tot de Dierkunde volume 48, issue 2, page 111-126 ISSN 0067-8546 2666-0644 |
op_doi |
https://doi.org/10.1163/26660644-04802002 |
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Bijdragen tot de Dierkunde |
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48 |
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2 |
container_start_page |
111 |
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126 |
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1766131710743805952 |