Evidence map›Paper›PMID 40957555›Full record

ArticleBiology letters2025

Quantitative analysis of stem-palaeognath flight capabilities sheds light on ratite dispersal and flight loss.

Klara Widrig, Fabio Alfieri, Pei-Chen Kuo, Helen James, Daniel J Field

Abstract read
In one paragraph

Article in Biology letters, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

  1. Article
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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

5 authors.

Klara WidrigDepartment of Vertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC, USA.ORCID 0000-0002-6224-0558
Fabio AlfieriDepartment of Earth Sciences, University of Cambridge, Cambridge, UK.ORCID 0000-0001-8241-7309
Pei-Chen KuoDepartment of Earth Sciences, University of Cambridge, Cambridge, UK.ORCID 0000-0002-5344-6634
Helen JamesDepartment of Vertebrate Zoology, Smithsonian National Museum of Natural History, Washington, DC, USA.ORCID 0000-0002-2495-6133
Daniel J FieldDepartment of Earth Sciences, University of Cambridge, Cambridge, UK.ORCID 0000-0002-1786-0352

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungUK Research and Innovation
6 · The paper itself

Abstract

Lithornithids are an assemblage of Palaeogene fossil birds thought to represent stem-group members of Palaeognathae. Among extant palaeognaths, which include flightless ratites such as ostriches, only tinamous can fly, though only in anaerobic bursts. Despite their limited dispersal capabilities, the phylogenetic interrelationships and geographic distributions of palaeognaths imply that their early relatives were capable of long-distance dispersal, although quantitative skeletal evidence has not been applied to this question. We investigate the flight capabilities and ecology of the Palaeogene lithornithid

Indexed as

Animal DistributionFlight, AnimalFossilsPalaeognathaeAnimalsBiological EvolutionPhylogenyWings, AnimalAvesbiogeographyfunctional morphologygeometric morphometricsLithornithidaePalaeognathae

Identifiers

PMID40957555
PMCPMC12440629

What OpenQuestion holds

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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.