Fossil Calibration Database

show/hide search details

======== GET (form) values ========
Array
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            [1] => FilterByAge
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    [TaxonA] => 
    [TaxonB] => 
    [FilterByClade] => Colubroidea
    [MinAge] => 
    [MaxAge] => 
    [FilterByGeologicalTime] => 
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======== $search object ========
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            [TaxonB] => 
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            [1] => FilterByAge
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    [SortResultsBy] => DATE_ADDED_DESC
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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.

Search for calibrations in the database — you can also browse the NCBI taxonomy

Advanced search filters

CLADE SUBMITTED: Colubroidea

nameToSourceNodeInfo('Colubroidea') return this node_data:
Array ( [taxonid] => 34989 [source] => NCBI )

nameToMultitreeID('Colubroidea') returns ID:
-1817

QUERY:
SELECT DISTINCT calibration_id FROM calibrations_by_NCBI_clade WHERE clade_root_multitree_id = '-1817' AND calibration_id IN (SELECT CalibrationID FROM calibrations WHERE PublicationStatus = 4)

Adding calibration 340 (inner add-op or non-cladistic search)

Adding calibration 341 (inner add-op or non-cladistic search)

Adding calibration 342 (inner add-op or non-cladistic search)

Adding calibration 343 (inner add-op or non-cladistic search)

Adding calibration 344 (inner add-op or non-cladistic search)

Adding calibration 345 (inner add-op or non-cladistic search)

Adding calibration 346 (inner add-op or non-cladistic search)

'Viperinae':
 displayedRelevance: 1 / 1 = 1.00

'Colubridae+Elapoidea':
 displayedRelevance: 1 / 1 = 1.00

'Naja':
 displayedRelevance: 1 / 1 = 1.00

'Oxyuraninae':
 displayedRelevance: 1 / 1 = 1.00

'Bungarus':
 displayedRelevance: 1 / 1 = 1.00

'Heterodon + Farancia':
 displayedRelevance: 1 / 1 = 1.00

'Pantherophis+Pituophis':
 displayedRelevance: 1 / 1 = 1.00

> 11.93 Ma

Added Jun 21, 2016

Pantherophis+Pituophis – from Head et al. 2016

Head, J.J., K. Mahlow, and J. Müller. 2016. Fossil calibration dates for molecular phylogenetic analysis of snakes 2: Caenophidia, Colubroidea, Elapoidea, Colubridae. Palaeontologia Electronica, 19.2.2FC more »

> 12.08 Ma

Added Jun 21, 2016

Heterodon + Farancia – from Head et al. 2016

> 10.215 Ma

Added Jun 21, 2016

Bungarus – from Head et al. 2016

> 10 Ma

Added Jun 21, 2016

Oxyuraninae – from Head et al. 2016

> 17 Ma

Added Jun 21, 2016

Naja – from Head et al. 2016