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

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

Research output: Contribution to journalArticle

37 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)51-59
Number of pages9
JournalMarine Genomics
Volume4
Issue number1
DOIs
StatePublished - Mar 1 2011

Fingerprint

Gastropoda
shell (molluscs)
slugs
slug
Snails
snail
snails
Paleozoic
shell
Mitochondrial Genome
Phylogeny
fossil record
Oceans and Seas
Names
phylogeny
fossils
genome
divergence
DNA
dating

All Science Journal Classification (ASJC) codes

  • Aquatic Science
  • Genetics

Cite this

Medina, Monica ; Lal, Shruti ; Vallès, Yvonne ; Takaoka, Tori L. ; Dayrat, Benoit A. ; Boore, Jeffrey L. ; Gosliner, Terrence. / Crawling through time : Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics. In: Marine Genomics. 2011 ; Vol. 4, No. 1. pp. 51-59.
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Crawling through time : Transition of snails to slugs dating back to the Paleozoic, based on mitochondrial phylogenomics. / Medina, Monica; Lal, Shruti; Vallès, Yvonne; Takaoka, Tori L.; Dayrat, Benoit A.; Boore, Jeffrey L.; Gosliner, Terrence.

In: Marine Genomics, Vol. 4, No. 1, 01.03.2011, p. 51-59.

Research output: Contribution to journalArticle

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