show/hide search details 
======== GET (form) values ========
Array
(
    [SortResultsBy] => DATE_ADDED_DESC
    [SimpleSearch] => 
    [HiddenFilters] => Array
        (
            [0] => FilterByTipTaxa
            [1] => FilterByAge
            [2] => FilterByGeologicalTime
        )

    [BlockedFilters] => Array
        (
            [0] => FilterByTipTaxa
        )

    [TaxonA] => 
    [TaxonB] => 
    [FilterByClade] => Amphibia
    [MinAge] => 
    [MaxAge] => 
    [FilterByGeologicalTime] => 
)
	
======== $search object ========
Array
(
    [SimpleSearch] => 
    [FilterByTipTaxa] => Array
        (
            [TaxonA] => 
            [TaxonB] => 
        )

    [FilterByClade] => Amphibia
    [FilterByAge] => Array
        (
            [MinAge] => 
            [MaxAge] => 
        )

    [FilterByGeologicalTime] => 
    [HiddenFilters] => Array
        (
            [0] => FilterByTipTaxa
            [1] => FilterByAge
            [2] => FilterByGeologicalTime
        )

    [BlockedFilters] => Array
        (
            [0] => FilterByTipTaxa
        )

    [SortResultsBy] => DATE_ADDED_DESC
    [ResponseType] => HTML
)

Raising the Standard in Fossil Calibration

The Fossil Calibration Database is a curated collection of well-justified calibrations, including many published in the journal Palaeontologia Electronica. We also promote best practices for justifying fossil calibrations and citing calibrations properly.

CLADE SUBMITTED: Amphibia
nameToSourceNodeInfo('Amphibia') return this node_data:
Array ( [taxonid] => 8292 [source] => NCBI )
nameToMultitreeID('Amphibia') returns ID:
-1374
QUERY:
SELECT DISTINCT calibration_id FROM calibrations_by_NCBI_clade WHERE clade_root_multitree_id = '-1374' AND calibration_id IN (SELECT CalibrationID FROM calibrations WHERE PublicationStatus = 4)
Adding calibration 229 (inner add-op or non-cladistic search)
Adding calibration 230 (inner add-op or non-cladistic search)
Adding calibration 231 (inner add-op or non-cladistic search)
Adding calibration 232 (inner add-op or non-cladistic search)
'Batrachia':
 displayedRelevance: 1 / 1 = 1.00
'Anura':
 displayedRelevance: 1 / 1 = 1.00
'Caudata':
 displayedRelevance: 1 / 1 = 1.00
'Gymnophiona':
 displayedRelevance: 1 / 1 = 1.00
Clade member 56–145.8 Ma Added Oct 02, 2014
Gymnophiona – from Benton et al. 2015
Benton, M.J., Donoghue, P.C.J., Asher, R.A., Friedman, M., Near, T.J., and Vinther, J. 2015. Constraints on the timescale of animal evolutionary history. Palaeontologia Electronica, 18.1.1FC.   more »
Clade member 146.8–175.1 Ma Added Oct 02, 2014
Caudata – from Benton et al. 2015
Benton, M.J., Donoghue, P.C.J., Asher, R.A., Friedman, M., Near, T.J., and Vinther, J. 2015. Constraints on the timescale of animal evolutionary history. Palaeontologia Electronica, 18.1.1FC.   more »
Clade member 165.3–201.5 Ma Added Oct 02, 2014
Anura – from Benton et al. 2015
Benton, M.J., Donoghue, P.C.J., Asher, R.A., Friedman, M., Near, T.J., and Vinther, J. 2015. Constraints on the timescale of animal evolutionary history. Palaeontologia Electronica, 18.1.1FC.   more »
Clade member 250–272.8 Ma Added Oct 02, 2014
Batrachia – from Benton et al. 2015
Benton, M.J., Donoghue, P.C.J., Asher, R.A., Friedman, M., Near, T.J., and Vinther, J. 2015. Constraints on the timescale of animal evolutionary history. Palaeontologia Electronica, 18.1.1FC.   more »
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