Evidence map›Paper›PMID 31438820›Full record

ArticlePhilosophical transactions of the Royal Society of London. Series B, Biological sciences2019

The evolution of insect metamorphosis: a developmental and endocrine view.

James W Truman, Lynn M Riddiford

Open access · hybridAbstract read
In one paragraph

Article in Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed, 1 pooled it
33.3field-weighted citation impact, top 1% of its field
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

81 citing papers in PubMed, 1 synthesis or guideline pooled it, 187 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Stage-Specific H3K14 and H3K23 Succinylation Orchestrates Insect Metamorphosis and Oogenesis.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  6. Article
  7. mInsects · 2026
    Review
  8. Article
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  11. Review
  12. Article
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  14. Article
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21 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

2 authors at 1 institution in 1 country.

James W TrumanDepartment of Biology, Friday Harbor Laboratories, University of Washington, Friday Harbor, WA 98250, USA.
Lynn M RiddifordDepartment of Biology, Friday Harbor Laboratories, University of Washington, Friday Harbor, WA 98250, USA.
University of Washington · US

Funding

Howard Hughes Medical Institute
6 · The paper itself

Abstract

Developmental, genetic and endocrine data from diverse taxa provide insight into the evolution of insect metamorphosis. We equate the larva-pupa-adult of the Holometabola to the pronymph-nymph-adult of hemimetabolous insects. The hemimetabolous pronymph is a cryptic embryonic stage with unique endocrinology and behavioural modifications that probably served as preadaptations for the larva. It develops in the absence of juvenile hormone (JH) as embryonic primordia undergo patterning and morphogenesis, the processes that were arrested for the evolution of the larva. Embryonic JH then drives tissue differentiation and nymph formation. Experimental treatment of pronymphs with JH terminates patterning and induces differentiation, mimicking the processes that occurred during the evolution of the larva. Unpatterned portions of primordia persist in the larva, becoming imaginal discs that form pupal and adult structures. Key transcription factors are associated with the holometabolous life stages: Krüppel-homolog 1 (Kr-h1) in the larva, broad in the pupa and E93 in the adult. Kr-h1 mediates JH action and is found whenever JH acts, while the other two genes direct the formation of their corresponding stages. In hemimetabolous forms, the pronymph has low Broad expression, followed by Broad expression through the nymphal moults, then a switch to E93 to form the adult. This article is part of the theme issue 'The evolution of complete metamorphosis'.

Indexed as

Biological EvolutionMetamorphosis, BiologicalAnimalsInsectaInsect ProteinsJuvenile HormonesLarvaNymphPupaInsect ProteinsJuvenile HormonesBroadE93juvenile hormoneKrüppel-homolog 1pronymph

Identifiers

PMID31438820
PMCPMC6711285
OpenAlexW2969824229

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.