@ARTICLE{TreeBASE2Ref19407,
author = {Robert Alexander Pyron},
title = {Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia},
year = {2011},
keywords = {Divergence-time estimation, Lissamphibia, fossil constraints, Tetrapoda, molecular clock, evolutionary rates},
doi = {10.1093/sysbio/syr047},
url = {http://},
pmid = {},
journal = {Systematic Biology},
volume = {60},
number = {4},
pages = {466--481},
abstract = {Were molecular data available for extinct taxa, questions regarding the origins of many groups could be settled in short order. As this is not the case, various strategies have been proposed to combine paleontological and neontological datasets. The use of fossil dates as node age calibrations for divergence time estimation from molecular phylogenies is commonplace. In addition, simulations suggest that the addition of morphological data from extinct taxa may improve phylogenetic estimation when combined with molecular data for extant species, and a few studies have combined morphological and molecular data to estimate combined-evidence phylogenies containing both fossil and extant taxa. However, to date, few if any studies have attempted to infer divergence time estimates using phylogenies containing both extinct and living taxa, sampled for both molecular and morphological data. Here, I infer both the phylogeny and time of origin for Lissamphibia using Bayesian methods, based on a dataset containing morphological data for extinct taxa, molecular data for a number of extant species, and molecular and morphological data for a subset of extant taxa. The results suggest that Lissamphibia is monophyletic, nested within Lepospondyli, and originated in the late Carboniferous at the earliest. This research illustrates potential pitfalls for the use of fossils as post-hoc age constraints on internal nodes, and highlights the importance of explicit phylogenetic analysis of extinct taxa. These results suggest that the application of fossils as minima or maxima on molecular phylogenies should be supplemented or supplanted by combined-evidence analyses whenever possible.}
}
Citation for Study 11114
Citation title:
"Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia".
Study name:
"Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia".
This study is part of submission 11104
(Status: Published).
Citation
Pyron R.A. 2011. Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia. Systematic Biology, 60(4): 466-481.
Authors
-
Pyron R.A.
(submitter)
706-489-9727
Abstract
Were molecular data available for extinct taxa, questions regarding the origins of many groups could be settled in short order. As this is not the case, various strategies have been proposed to combine paleontological and neontological datasets. The use of fossil dates as node age calibrations for divergence time estimation from molecular phylogenies is commonplace. In addition, simulations suggest that the addition of morphological data from extinct taxa may improve phylogenetic estimation when combined with molecular data for extant species, and a few studies have combined morphological and molecular data to estimate combined-evidence phylogenies containing both fossil and extant taxa. However, to date, few if any studies have attempted to infer divergence time estimates using phylogenies containing both extinct and living taxa, sampled for both molecular and morphological data. Here, I infer both the phylogeny and time of origin for Lissamphibia using Bayesian methods, based on a dataset containing morphological data for extinct taxa, molecular data for a number of extant species, and molecular and morphological data for a subset of extant taxa. The results suggest that Lissamphibia is monophyletic, nested within Lepospondyli, and originated in the late Carboniferous at the earliest. This research illustrates potential pitfalls for the use of fossils as post-hoc age constraints on internal nodes, and highlights the importance of explicit phylogenetic analysis of extinct taxa. These results suggest that the application of fossils as minima or maxima on molecular phylogenies should be supplemented or supplanted by combined-evidence analyses whenever possible.
Keywords
Divergence-time estimation, Lissamphibia, fossil constraints, Tetrapoda, molecular clock, evolutionary rates
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S11114
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref19407,
author = {Robert Alexander Pyron},
title = {Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia},
year = {2011},
keywords = {Divergence-time estimation, Lissamphibia, fossil constraints, Tetrapoda, molecular clock, evolutionary rates},
doi = {10.1093/sysbio/syr047},
url = {http://},
pmid = {},
journal = {Systematic Biology},
volume = {60},
number = {4},
pages = {466--481},
abstract = {Were molecular data available for extinct taxa, questions regarding the origins of many groups could be settled in short order. As this is not the case, various strategies have been proposed to combine paleontological and neontological datasets. The use of fossil dates as node age calibrations for divergence time estimation from molecular phylogenies is commonplace. In addition, simulations suggest that the addition of morphological data from extinct taxa may improve phylogenetic estimation when combined with molecular data for extant species, and a few studies have combined morphological and molecular data to estimate combined-evidence phylogenies containing both fossil and extant taxa. However, to date, few if any studies have attempted to infer divergence time estimates using phylogenies containing both extinct and living taxa, sampled for both molecular and morphological data. Here, I infer both the phylogeny and time of origin for Lissamphibia using Bayesian methods, based on a dataset containing morphological data for extinct taxa, molecular data for a number of extant species, and molecular and morphological data for a subset of extant taxa. The results suggest that Lissamphibia is monophyletic, nested within Lepospondyli, and originated in the late Carboniferous at the earliest. This research illustrates potential pitfalls for the use of fossils as post-hoc age constraints on internal nodes, and highlights the importance of explicit phylogenetic analysis of extinct taxa. These results suggest that the application of fossils as minima or maxima on molecular phylogenies should be supplemented or supplanted by combined-evidence analyses whenever possible.}
}
- Show RIS reference
TY - JOUR
ID - 19407
AU - Pyron,Robert Alexander
T1 - Divergence-Time Estimation Using Fossils as Terminal Taxa and the Origins of Lissamphibia
PY - 2011
KW - Divergence-time estimation
KW - Lissamphibia
KW - fossil constraints
KW - Tetrapoda
KW - molecular clock
KW - evolutionary rates
UR - http://dx.doi.org/10.1093/sysbio/syr047
N2 - Were molecular data available for extinct taxa, questions regarding the origins of many groups could be settled in short order. As this is not the case, various strategies have been proposed to combine paleontological and neontological datasets. The use of fossil dates as node age calibrations for divergence time estimation from molecular phylogenies is commonplace. In addition, simulations suggest that the addition of morphological data from extinct taxa may improve phylogenetic estimation when combined with molecular data for extant species, and a few studies have combined morphological and molecular data to estimate combined-evidence phylogenies containing both fossil and extant taxa. However, to date, few if any studies have attempted to infer divergence time estimates using phylogenies containing both extinct and living taxa, sampled for both molecular and morphological data. Here, I infer both the phylogeny and time of origin for Lissamphibia using Bayesian methods, based on a dataset containing morphological data for extinct taxa, molecular data for a number of extant species, and molecular and morphological data for a subset of extant taxa. The results suggest that Lissamphibia is monophyletic, nested within Lepospondyli, and originated in the late Carboniferous at the earliest. This research illustrates potential pitfalls for the use of fossils as post-hoc age constraints on internal nodes, and highlights the importance of explicit phylogenetic analysis of extinct taxa. These results suggest that the application of fossils as minima or maxima on molecular phylogenies should be supplemented or supplanted by combined-evidence analyses whenever possible.
L3 - 10.1093/sysbio/syr047
JF - Systematic Biology
VL - 60
IS - 4
SP - 466
EP - 481
ER -