Evidence map›Paper›PMID 23627680›Full record

ArticleBMC evolutionary biology2013

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes.

R Alexander Pyron, Frank T Burbrink, John J Wiens

Abstract read
In one paragraph

Article in BMC evolutionary biology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 471 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
471citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

471 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. A systematic review of snake translocations to identify potential tactics for reducing postrelease effects.Conservation biology : the journal of the Society for Conservation Biology · 2023
    Pooled it
  2. Pooled it
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  15. Spatial Patterns of Variation in Climatic Niche Breadths in Agamid Lizards.Animals : an open access journal from MDPI · 2026
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  18. A New Species of the GenusAnimals : an open access journal from MDPI · 2026
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411 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

R Alexander PyronDepartment of Biological Sciences, The George Washington University, 2023 G St. NW, Washington, DC 20052, USA. rpyron@colubroid.org
Frank T Burbrink
John J Wiens

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe extant squamates (>9400 known species of lizards and snakes) are one of the most diverse and conspicuous radiations of terrestrial vertebrates, but no studies have attempted to reconstruct a phylogeny for the group with large-scale taxon sampling. Such an estimate is invaluable for comparative evolutionary studies, and to address their classification. Here, we present the first large-scale phylogenetic estimate for Squamata.

resultsThe estimated phylogeny contains 4161 species, representing all currently recognized families and subfamilies. The analysis is based on up to 12896 base pairs of sequence data per species (average = 2497 bp) from 12 genes, including seven nuclear loci (BDNF, c-mos, NT3, PDC, R35, RAG-1, and RAG-2), and five mitochondrial genes (12S, 16S, cytochrome b, ND2, and ND4). The tree provides important confirmation for recent estimates of higher-level squamate phylogeny based on molecular data (but with more limited taxon sampling), estimates that are very different from previous morphology-based hypotheses. The tree also includes many relationships that differ from previous molecular estimates and many that differ from traditional taxonomy.

conclusionsWe present a new large-scale phylogeny of squamate reptiles that should be a valuable resource for future comparative studies. We also present a revised classification of squamates at the family and subfamily level to bring the taxonomy more in line with the new phylogenetic hypothesis. This classification includes new, resurrected, and modified subfamilies within gymnophthalmid and scincid lizards, and boid, colubrid, and lamprophiid snakes.

Indexed as

PhylogenyAnimalsBiological EvolutionLizardsReptilian ProteinsSequence Analysis, DNASnakesReptilian Proteins

Identifiers

PMID23627680
PMCPMC3682911

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.