Evidence map›Paper›PMID 23284667›Full record

ArticlePloS one2012

Unexplored character diversity in onychophora (velvet worms): A comparative study of three peripatid species.

Ivo de Sena Oliveira, Franziska Anni Franke, Lars Hering, Stefan Schaffer, David M Rowell, Andreas Weck-Heimann, Julián Monge-Nájera, Bernal Morera-Brenes, Georg Mayer

Open access · goldAbstract readComparative Study
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
9.8field-weighted citation impact, top 2% 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

22 citing papers in PubMed, 56 citations in OpenAlex.

  1. Conserved leucine-rich repeat proteins in the adhesive projectile slime of velvet worms.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  9. Do holocentric chromosomes represent an evolutionary advantage? A study of paired analyses of diversification rates of lineages with holocentric chromosomes and their monocentric closest relatives.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2018
    Article
  10. Article
  11. Myoanatomy of the velvet worm leg revealed by laboratory-based nanofocus X-ray source tomography.Proceedings of the National Academy of Sciences of the United States of America · 2017
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  12. Article
  13. The nervous and visual systems of onychophorans and tardigrades: learning about arthropod evolution from their closest relatives.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2017
    Review
  14. Article
  15. Carboniferous Onychophora from Montceau-les-Mines, France, and onychophoran terrestrialization.Invertebrate biology : a quarterly journal of the American Microscopical Society and the Division of Invertebrate Zoology/ASZ · 2016
    Article
  16. A superarmored lobopodian from the Cambrian of China and early disparity in the evolution of Onychophora.Proceedings of the National Academy of Sciences of the United States of America · 2015
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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

9 authors at 5 institutions in 3 countries.

Ivo de Sena OliveiraAnimal Evolution and Development, Institute of Biology, University of Leipzig, Leipzig, Germany. ivo.de_sena_oliveira@uni-leipzig.de
Franziska Anni Franke
Lars Hering
Stefan Schaffer
David M Rowell
Andreas Weck-Heimann
Julián Monge-Nájera
Bernal Morera-Brenes
Georg Mayer
Leipzig University · DEAustralian National University · AUSenckenberg Natural History Collections Dresden · DEUniversidad de Costa Rica · CRUniversidad Nacional · CR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Low character variation among onychophoran species has been an obstacle for taxonomic and phylogenetic studies in the past, however we have identified a number of new and informative characters using morphological, molecular, and chromosomal techniques. Our analyses involved a detailed examination of Epiperipatus biolleyi from Costa Rica, Eoperipatus sp. from Thailand, and a new onychophoran species and genus from Costa Rica, Principapillatus hitoyensisgen. et sp. nov.. Scanning electron microscopy on embryos and specimens of varying age revealed novel morphological characters and character states, including the distribution of different receptor types along the antennae, the arrangement and form of papillae on the head, body and legs, the presence and shape of interpedal structures and fields of modified scales on the ventral body surface, the arrangement of lips around the mouth, the number, position and structure of crural tubercles and anal gland openings, and the presence and shape of embryonic foot projections. Karyotypic analyses revealed differences in the number and size of chromosomes among the species studied. The results of our phylogenetic analyses using mitochondrial COI and 12S rRNA gene sequences are in line with morphological and karyotype data. However, our data show a large number of unexplored, albeit informative, characters in the Peripatidae. We suggest that analysing these characters in additional species would help unravel species diversity and phylogeny in the Onychophora, and that inconsistencies among most diagnostic features used for the peripatid genera in the literature could be addressed by identifying a suite of characters common to all peripatids.

Indexed as

BiodiversityAnimalsClimateCosta RicaEcosystemInvertebratesMicroscopy, Electron, ScanningPhylogenyReproductionTerminology as Topic

Identifiers

PMID23284667
PMCPMC3524137
OpenAlexW2093532005

What OpenQuestion holds

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LicenceCC BY
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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.