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Citation for Study 11475

Citation title: "A Total-evidence approach to dating with fossils, applied to the early radiation of the Hymenoptera".

Study name: "A Total-evidence approach to dating with fossils, applied to the early radiation of the Hymenoptera".

This study is part of submission 11465 (Status: Published).

Citation

Ronquist F., Klopfstein S., Lars V., Schulmeister S., Murray D., & Rasnitsyn A.P. 2012. A Total-evidence approach to dating with fossils, applied to the early radiation of the Hymenoptera. Systematic Biology, 61(6): 973-999.

Authors

• Ronquist F.
• Klopfstein S.
• Lars V.
• Schulmeister S.
• Murray D.
• Rasnitsyn A.P.

Abstract

Phylogenies are usually dated by calibrating interior nodes against the fossil record. This relies on indirect methods that, in the worst case, misrepresent the fossil information. Here, we contrast such node dating with an approach that includes fossils along with the extant taxa in a Bayesian total-evidence analysis. As a test case, we focus on the early radiation ofthe Hymenoptera, mostly documented by poorly preserved impression fossils that are difficult to place phylogenetically. Specifically, we compare node dating using nine calibration points derived from the fossil record with total-evidence dating based on 343 morphological characters scored for 45 fossil (4-20% complete) and 68 extant taxa. In both cases we use molecular data from seven markers (~5 kb) for the extant taxa. Because it is difficult to model speciation, extinction, sampling, and fossil preservation realistically, we develop a simple uniform prior for clock trees with fossils, and we use relaxed clock models to accommodate rate variation across the tree. Despite considerable uncertainty in the placement of most fossils, we find that they contribute significantly to the estimation of divergence times in the total-evidence analysis. In particular, the posterior distributions on divergence times are less sensitive to prior assumptions and tend to be more precise than in node dating. The total-evidence analysis also shows that four of the seven Hymenoptera calibration points used in node dating are likely to be based on erroneous or doubtful assumptions about the fossil placement. With respect to the early radiation of Hymenoptera, our results suggest that the crown group dates back to the Carboniferous, ~309 Ma(95% interval: 291-347 Ma), and diversified into major extant lineages much earlier than previously thought, well before the Triassic.

External links

• DOI: 10.1093/sysbio/sys058

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S11475
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref19680,
  	 author = {Fredrik  Ronquist and Seraina  Klopfstein and Vilhelmsen  Lars and Susanne  Schulmeister and Debra  Murray and Alexandr P. Rasnitsyn},
  	 title = {A Total-evidence approach to dating with fossils, applied to the early radiation of the Hymenoptera},
  	 year = {2012},
  	 keywords = {},
  	 doi = {10.1093/sysbio/sys058},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Systematic Biology},
  	 volume = {61},
  	 number = {6},
  	 pages = {973--999},
  	 abstract = {Phylogenies are usually dated by calibrating interior nodes against the fossil record. This relies on indirect methods that, in the worst case, misrepresent the fossil information. Here, we contrast such node dating with an approach that includes fossils along with the extant taxa in a Bayesian total-evidence analysis. As a test case, we focus on the early radiation ofthe Hymenoptera, mostly documented by poorly preserved impression fossils that are difficult to place phylogenetically. Specifically, we compare node dating using nine calibration points derived from the fossil record with total-evidence dating based on 343 morphological characters scored for 45 fossil (4-20% complete) and 68 extant taxa. In both cases we use molecular data from seven markers (~5 kb) for the extant taxa. Because it is difficult to model speciation, extinction, sampling, and fossil preservation realistically, we develop a simple uniform prior for clock trees with fossils, and we use relaxed clock models to accommodate rate variation across the tree. Despite considerable uncertainty in the placement of most fossils, we find that they contribute significantly to the estimation of divergence times in the total-evidence analysis. In particular, the posterior distributions on divergence times are less sensitive to prior assumptions and tend to be more precise than in node dating. The total-evidence analysis also shows that four of the seven Hymenoptera calibration points used in node dating are likely to be based on erroneous or doubtful assumptions about the fossil placement. With respect to the early radiation of Hymenoptera, our results suggest that the crown group dates back to the Carboniferous, ~309 Ma(95% interval: 291-347 Ma), and diversified into major extant lineages much earlier than previously thought, well before the Triassic.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 19680
  AU  - Ronquist,Fredrik 
  AU  - Klopfstein,Seraina 
  AU  - Lars,Vilhelmsen 
  AU  - Schulmeister,Susanne 
  AU  - Murray,Debra 
  AU  - Rasnitsyn,Alexandr P.
  T1  - A Total-evidence approach to dating with fossils, applied to the early radiation of the Hymenoptera
  PY  - 2012
  KW  - 
  UR  - http://dx.doi.org/10.1093/sysbio/sys058
  N2  - Phylogenies are usually dated by calibrating interior nodes against the fossil record. This relies on indirect methods that, in the worst case, misrepresent the fossil information. Here, we contrast such node dating with an approach that includes fossils along with the extant taxa in a Bayesian total-evidence analysis. As a test case, we focus on the early radiation ofthe Hymenoptera, mostly documented by poorly preserved impression fossils that are difficult to place phylogenetically. Specifically, we compare node dating using nine calibration points derived from the fossil record with total-evidence dating based on 343 morphological characters scored for 45 fossil (4-20% complete) and 68 extant taxa. In both cases we use molecular data from seven markers (~5 kb) for the extant taxa. Because it is difficult to model speciation, extinction, sampling, and fossil preservation realistically, we develop a simple uniform prior for clock trees with fossils, and we use relaxed clock models to accommodate rate variation across the tree. Despite considerable uncertainty in the placement of most fossils, we find that they contribute significantly to the estimation of divergence times in the total-evidence analysis. In particular, the posterior distributions on divergence times are less sensitive to prior assumptions and tend to be more precise than in node dating. The total-evidence analysis also shows that four of the seven Hymenoptera calibration points used in node dating are likely to be based on erroneous or doubtful assumptions about the fossil placement. With respect to the early radiation of Hymenoptera, our results suggest that the crown group dates back to the Carboniferous, ~309 Ma(95% interval: 291-347 Ma), and diversified into major extant lineages much earlier than previously thought, well before the Triassic.
  L3  - 10.1093/sysbio/sys058
  JF  - Systematic Biology
  VL  - 61
  IS  - 6
  SP  - 973
  EP  - 999
  ER  -