DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina
Using data from the direct sequencing of fragments of three mitochondrial genes (12S and 16S ribosomal RNA, and cytochrome- b ); total length 1469 b.p.) we have reconstructed a gene phylogeny for all 19 living species of the gastropod genus Littorina . Members of the closely related genera Nodilitto...
Published in: | Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rstb.1996.0082 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1996.0082 |
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crroyalsociety:10.1098/rstb.1996.0082 2024-09-09T19:26:02+00:00 DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina 1996 http://dx.doi.org/10.1098/rstb.1996.0082 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1996.0082 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences volume 351, issue 1342, page 877-895 ISSN 0962-8436 1471-2970 journal-article 1996 crroyalsociety https://doi.org/10.1098/rstb.1996.0082 2024-07-29T04:23:16Z Using data from the direct sequencing of fragments of three mitochondrial genes (12S and 16S ribosomal RNA, and cytochrome- b ); total length 1469 b.p.) we have reconstructed a gene phylogeny for all 19 living species of the gastropod genus Littorina . Members of the closely related genera Nodilittorina , Littoraria and Mainwaringia have been used as outgroups, and it appears that Littorina is monophyletic. An earlier morphological phylogeny has been revised, and its topology found to be almost entirely consistent with that from the molecular data. The fossil record is sparse, but likewise consistent. A consensus tree is presented, showing clear resolution of basal and terminal branches, and a central unresolved polychotomy. We have used fossil evidence and geological events to estimate the ages of some clades, and thus to calculate average rates of molecular evolution, which in turn provide approximate dates for all branches of the molecular phylogeny. The central polychotomy may be explained by a burst of rapid speciation in the northwestern Pacific during the Middle Miocene, perhaps driven by climatic fluctuation. Our results support the hypothesis that the two clades of Littorina in the northern Atlantic originated from Pacific ancestors which took part in the Pliocene trans-Arctic migration of marine organisms. Article in Journal/Newspaper Arctic The Royal Society Arctic Pacific Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 351 1342 877 895 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Using data from the direct sequencing of fragments of three mitochondrial genes (12S and 16S ribosomal RNA, and cytochrome- b ); total length 1469 b.p.) we have reconstructed a gene phylogeny for all 19 living species of the gastropod genus Littorina . Members of the closely related genera Nodilittorina , Littoraria and Mainwaringia have been used as outgroups, and it appears that Littorina is monophyletic. An earlier morphological phylogeny has been revised, and its topology found to be almost entirely consistent with that from the molecular data. The fossil record is sparse, but likewise consistent. A consensus tree is presented, showing clear resolution of basal and terminal branches, and a central unresolved polychotomy. We have used fossil evidence and geological events to estimate the ages of some clades, and thus to calculate average rates of molecular evolution, which in turn provide approximate dates for all branches of the molecular phylogeny. The central polychotomy may be explained by a burst of rapid speciation in the northwestern Pacific during the Middle Miocene, perhaps driven by climatic fluctuation. Our results support the hypothesis that the two clades of Littorina in the northern Atlantic originated from Pacific ancestors which took part in the Pliocene trans-Arctic migration of marine organisms. |
format |
Article in Journal/Newspaper |
title |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
spellingShingle |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
title_short |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
title_full |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
title_fullStr |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
title_full_unstemmed |
DNA, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus Littorina |
title_sort |
dna, morphology and fossils: phylogeny and evolutionary rates of the gastropod genus littorina |
publisher |
The Royal Society |
publishDate |
1996 |
url |
http://dx.doi.org/10.1098/rstb.1996.0082 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1996.0082 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences volume 351, issue 1342, page 877-895 ISSN 0962-8436 1471-2970 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1996.0082 |
container_title |
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences |
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351 |
container_issue |
1342 |
container_start_page |
877 |
op_container_end_page |
895 |
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1809895731682607104 |