Crawling through time: Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics

Mónica Medina; Shruti Lal; Yvonne Vallès; Tori L. Takaoka; Benoît A. Dayrat; Jeffrey L. Boore; Terrence Gosliner

doi:10.1016/j.margen.2010.12.006

Crawling through time: Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics

Mónica Medina, Shruti Lal, Yvonne Vallès, Tori L. Takaoka, Benoît A. Dayrat, Jeffrey L. Boore, Terrence Gosliner

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Sea slugs (Gastropoda: Opisthobranchia) are characterized by extensive morphological homoplasy. In particular, reduced or absent shells are predominant throughout the group. This trend towards shell loss has resulted in a poor fossil record. DNA-based phylogenies have been helpful in improving our understanding of the evolution of this group and major clades are emerging. We report 13 new complete opisthobranch mitochondrial genomes that provide robust support for some of these emerging nodes. We name three new clades within the Opisthobranchia, the Actopleura (Acteonoidea plus Nudipleura), Placoesophaga (Cephalaspidea plus Anaspidea), and Siphoglossa (Sacoglossa plus the Siphonaria). Finally we use molecular clock dating that suggests an earlier opisthobranch divergence than previously reported. The implications of this evolutionary scenario are discussed.

Original language	English (US)
Pages (from-to)	51-59
Number of pages	9
Journal	Marine Genomics
Volume	4
Issue number	1
DOIs	https://doi.org/10.1016/j.margen.2010.12.006
State	Published - Mar 2011

All Science Journal Classification (ASJC) codes

Aquatic Science
Genetics

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10.1016/j.margen.2010.12.006

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@article{54bc77291527470a854f16a6c5544502,

title = "Crawling through time: Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics",

abstract = "Sea slugs (Gastropoda: Opisthobranchia) are characterized by extensive morphological homoplasy. In particular, reduced or absent shells are predominant throughout the group. This trend towards shell loss has resulted in a poor fossil record. DNA-based phylogenies have been helpful in improving our understanding of the evolution of this group and major clades are emerging. We report 13 new complete opisthobranch mitochondrial genomes that provide robust support for some of these emerging nodes. We name three new clades within the Opisthobranchia, the Actopleura (Acteonoidea plus Nudipleura), Placoesophaga (Cephalaspidea plus Anaspidea), and Siphoglossa (Sacoglossa plus the Siphonaria). Finally we use molecular clock dating that suggests an earlier opisthobranch divergence than previously reported. The implications of this evolutionary scenario are discussed.",

author = "M{\'o}nica Medina and Shruti Lal and Yvonne Vall{\`e}s and Takaoka, {Tori L.} and Dayrat, {Beno{\^i}t A.} and Boore, {Jeffrey L.} and Terrence Gosliner",

note = "Funding Information: We thank Angel Vald{\'e}s for the collection of the Lifou specimens, Matt Fourcade for the help with rolling circle amplification, and Jennifer Kuehl for the help with genome annotation in DOGMA. Part of this work was performed under the auspices of the US Department of Energy's Office of Science, Biological and Environmental Research Program, and by the University of California, Lawrence Berkeley National Laboratory under Contract No. DE-AC02-05CH11231. Part of this research was also supported by NSF Grants DEB-0542330 to M{\'o}nica Medina and NSF DEB 0329054 to Terrence Gosliner and A. Vald{\'e}s. ",

year = "2011",

month = mar,

doi = "10.1016/j.margen.2010.12.006",

language = "English (US)",

volume = "4",

pages = "51--59",

journal = "Marine Genomics",

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T2 - Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics

AU - Medina, Mónica

AU - Lal, Shruti

AU - Vallès, Yvonne

AU - Takaoka, Tori L.

AU - Dayrat, Benoît A.

AU - Boore, Jeffrey L.

AU - Gosliner, Terrence

N1 - Funding Information: We thank Angel Valdés for the collection of the Lifou specimens, Matt Fourcade for the help with rolling circle amplification, and Jennifer Kuehl for the help with genome annotation in DOGMA. Part of this work was performed under the auspices of the US Department of Energy's Office of Science, Biological and Environmental Research Program, and by the University of California, Lawrence Berkeley National Laboratory under Contract No. DE-AC02-05CH11231. Part of this research was also supported by NSF Grants DEB-0542330 to Mónica Medina and NSF DEB 0329054 to Terrence Gosliner and A. Valdés.

PY - 2011/3

Y1 - 2011/3

N2 - Sea slugs (Gastropoda: Opisthobranchia) are characterized by extensive morphological homoplasy. In particular, reduced or absent shells are predominant throughout the group. This trend towards shell loss has resulted in a poor fossil record. DNA-based phylogenies have been helpful in improving our understanding of the evolution of this group and major clades are emerging. We report 13 new complete opisthobranch mitochondrial genomes that provide robust support for some of these emerging nodes. We name three new clades within the Opisthobranchia, the Actopleura (Acteonoidea plus Nudipleura), Placoesophaga (Cephalaspidea plus Anaspidea), and Siphoglossa (Sacoglossa plus the Siphonaria). Finally we use molecular clock dating that suggests an earlier opisthobranch divergence than previously reported. The implications of this evolutionary scenario are discussed.

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Crawling through time: Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics

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