Evidence map›Paper›PMID 30181261›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2018

Evolution of metazoan morphological disparity.

Bradley Deline, Jennifer M Greenwood, James W Clark, Mark N Puttick, Kevin J Peterson, Philip C J Donoghue

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
–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

42 citing papers in PubMed.

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  4. Uniqueness and predictability in evolution and the history of mollusks.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  18. Soft robotics informs how an early echinoderm moved.Proceedings of the National Academy of Sciences of the United States of America · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Bradley DelineDepartment of Geoscience, University of West Georgia, Carrollton, GA 30118; bdeline@westga.edu phil.donoghue@bristol.ac.uk.
Jennifer M GreenwoodSchool of Earth Sciences, University of Bristol, BS8 1TQ Bristol, United Kingdom.
James W ClarkSchool of Earth Sciences, University of Bristol, BS8 1TQ Bristol, United Kingdom.
Mark N PuttickSchool of Earth Sciences, University of Bristol, BS8 1TQ Bristol, United Kingdom.
Kevin J PetersonDepartment of Biological Science, Dartmouth College, Hanover, NH 03755.
Philip C J DonoghueSchool of Earth Sciences, University of Bristol, BS8 1TQ Bristol, United Kingdom; bdeline@westga.edu phil.donoghue@bristol.ac.uk.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The animal kingdom exhibits a great diversity of organismal form (i.e., disparity). Whether the extremes of disparity were achieved early in animal evolutionary history or clades continually explore the limits of possible morphospace is subject to continuing debate. Here we show, through analysis of the disparity of the animal kingdom, that, even though many clades exhibit maximal initial disparity, arthropods, chordates, annelids, echinoderms, and mollusks have continued to explore and expand the limits of morphospace throughout the Phanerozoic, expanding dramatically the envelope of disparity occupied in the Cambrian. The "clumpiness" of morphospace occupation by living clades is a consequence of the extinction of phylogenetic intermediates, indicating that the original distribution of morphologies was more homogeneous. The morphological distances between phyla mirror differences in complexity, body size, and species-level diversity across the animal kingdom. Causal hypotheses of morphologic expansion include time since origination, increases in genome size, protein repertoire, gene family expansion, and gene regulation. We find a strong correlation between increasing morphological disparity, genome size, and microRNA repertoire, but no correlation to protein domain diversity. Our results are compatible with the view that the evolution of gene regulation has been influential in shaping metazoan disparity whereas the invasion of terrestrial ecospace appears to represent an additional gestalt, underpinning the post-Cambrian expansion of metazoan disparity.

Indexed as

BiodiversityBiological EvolutionAnimalsFossilsGene Expression RegulationGenome SizeMicroRNAsProteinsMicroRNAsProteinsCambrian explosiondisparityevolutionMetazoamorphology

Identifiers

PMID30181261
PMCPMC6156614

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Registered trials

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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.