Evidence map›Paper›PMID 29391458›Full record

ArticleNature communications2018

Early Cambrian fuxianhuiids from China reveal origin of the gnathobasic protopodite in euarthropods.

Jie Yang, Javier Ortega-Hernández, David A Legg, Tian Lan, Jin-Bo Hou, Xi-Guang Zhang

Abstract read
In one paragraph

Article in Nature communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

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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

19 citing papers in PubMed.

  1. Quantifying Evolutionary Dynamics of Arthropodization and Arthrodization.BioEssays : news and reviews in molecular, cellular and developmental biology · 2026
    Review
  2. Article
  3. PeerJ · 2026
    Article
  4. Article
  5. Cambrian euarthropodiScience · 2024
    Article
  6. The CambrianProceedings. Biological sciences · 2024
    Article
  7. Review
  8. Three-dimensional morphology of the biramous appendages inProceedings. Biological sciences · 2023
    Article
  9. The problematic Cambrian arthropodRoyal Society open science · 2022
    Article
  10. Review
  11. The evolution of biramous appendages revealed by a carapace-bearing Cambrian arthropod.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
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

6 authors.

Jie YangKey Laboratory for Palaeobiology, Yunnan University, Kunming, 650091, China.
Javier Ortega-HernándezDepartment of Zoology, University of Cambridge, Downing Street, Cambridge, CB2 3EJ, UK.ORCID http://orcid.org/0000-0002-6801-7373
David A LeggDepartment of Earth, Atmospheric, and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK.ORCID http://orcid.org/0000-0003-0635-7310
Tian LanCollege of Resources and Environmental Engineering, Guizhou University, Guiyang, 550003, China.
Jin-Bo HouKey Laboratory for Palaeobiology, Yunnan University, Kunming, 650091, China.
Xi-Guang ZhangKey Laboratory for Palaeobiology, Yunnan University, Kunming, 650091, China. xgzhang@ynu.edu.cn.ORCID http://orcid.org/0000-0003-4697-0531

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Euarthropods owe their evolutionary and ecological success to the morphological plasticity of their appendages. Although this variability is partly expressed in the specialization of the protopodite for a feeding function in the post-deutocerebral limbs, the origin of the former structure among Cambrian representatives remains uncertain. Here, we describe Alacaris mirabilis gen. et sp. nov. from the early Cambrian Xiaoshiba Lagerstätte in China, which reveals the proximal organization of fuxianhuiid appendages in exceptional detail. Proximally, the post-deutocerebral limbs possess an antero-posteriorly compressed protopodite with robust spines. The protopodite is attached to an endopod with more than a dozen podomeres, and an oval flap-shaped exopod. The gnathal edges of the protopodites form an axial food groove along the ventral side of the body, indicating a predatory/scavenging autecology. A cladistic analysis indicates that the fuxianhuiid protopodite represents the phylogenetically earliest occurrence of substantial proximal differentiation within stem-group Euarthropoda illuminating the origin of gnathobasic feeding.

Indexed as

Biological EvolutionAnimalsArthropodsChinaExtremitiesFossilsPhylogeny

Identifiers

PMID29391458
PMCPMC5794847

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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.