@ARTICLE{TreeBASE2Ref16640,
author = {Monica Medina and Patrick J. Walsh},
title = {Molecular Systematics of the Order Anaspidea Based on Mitochondrial DNA Sequence (12S, 16S, and COI).},
year = {2000},
keywords = {},
doi = {10.1006/mpev.1999.0736},
url = {},
pmid = {},
journal = {Molecular Phylogenetics and Evolution},
volume = {15},
number = {1},
pages = {41--58},
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 maybe 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.}
}
Citation for Study 713
Citation title:
"Molecular Systematics of the Order Anaspidea Based on Mitochondrial DNA Sequence (12S, 16S, and COI).".
This study was previously identified under the legacy study ID S554
(Status: Published).
Citation
Medina M., & Walsh P. 2000. Molecular Systematics of the Order Anaspidea Based on Mitochondrial DNA Sequence (12S, 16S, and COI). Molecular Phylogenetics and Evolution, 15(1): 41-58.
Authors
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 maybe 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.
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About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S713
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref16640,
author = {Monica Medina and Patrick J. Walsh},
title = {Molecular Systematics of the Order Anaspidea Based on Mitochondrial DNA Sequence (12S, 16S, and COI).},
year = {2000},
keywords = {},
doi = {10.1006/mpev.1999.0736},
url = {},
pmid = {},
journal = {Molecular Phylogenetics and Evolution},
volume = {15},
number = {1},
pages = {41--58},
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 maybe 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.}
}
- Show RIS reference
TY - JOUR
ID - 16640
AU - Medina,Monica
AU - Walsh,Patrick J.
T1 - Molecular Systematics of the Order Anaspidea Based on Mitochondrial DNA Sequence (12S, 16S, and COI).
PY - 2000
UR - http://dx.doi.org/10.1006/mpev.1999.0736
N2 - 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 maybe 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.
L3 - 10.1006/mpev.1999.0736
JF - Molecular Phylogenetics and Evolution
VL - 15
IS - 1
SP - 41
EP - 58
ER -