Molecular systematics of the order Anaspidea based on mitochondrial DNA sequence (12S, 16S, and COI)

Monica Medina, Patrick J. Walsh

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Fragments from three mitochondrial genes (12S, 16S, and COI) were sequenced to reconstruct a molecular phylogeny of the opisthobranch order Anaspidea. The molecular phylogeny supports the placement of the genus Akera, a taxon previously regarded by some authors as a cephalaspidean, within the Anaspidea. Incongruence between the molecular data and the classifications based on morphology suggests that some of the taxonomic characters (i.e., shell, parapodia fusion) traditionally used for the classification of sea hares must be reevaluated, since they may be homoplastic. The ancestral nature of Notarchus based on the molecular evidence suggests that homoplasy may be an explanation for the morphological resemblance of this species to the more derived sea hares with highly fused parapodia and concentrated nerve ganglia. Finally, examples are given of how comparative studies of the evolution of learning mechanisms in the anaspidean clade will benefit from the phylogenetic hypothesis presented in this paper. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)41-58
Number of pages18
JournalMolecular Phylogenetics and Evolution
Volume15
Issue number1
DOIs
StatePublished - Jan 1 2000

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Orthotic Devices
molecular systematics
Phylogeny
Mitochondrial DNA
Oceans and Seas
mitochondrial DNA
phylogeny
nucleotide sequences
Mitochondrial Genes
Ganglia
comparative study
learning
Learning
shell
taxonomy
phylogenetics
shell (molluscs)
gene
nerve tissue

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

Cite this

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Molecular systematics of the order Anaspidea based on mitochondrial DNA sequence (12S, 16S, and COI). / Medina, Monica; Walsh, Patrick J.

In: Molecular Phylogenetics and Evolution, Vol. 15, No. 1, 01.01.2000, p. 41-58.

Research output: Contribution to journalArticle

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