Evidence map›Paper›PMID 31523493›Full record

ArticlePeerJ2019

Filter feeding in Late Jurassic pterosaurs supported by coprolite contents.

Martin Qvarnström, Erik Elgh, Krzysztof Owocki, Per E Ahlberg, Grzegorz Niedźwiedzki

Open access · goldAbstract read
In one paragraph

Article in PeerJ, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
5.0field-weighted citation impact, top 6% 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

6 citing papers in PubMed, 22 citations in OpenAlex.

  1. Article
  2. WasPeerJ · 2025
    Article
  3. Article
  4. Two emetolite-pterosaur associations from the Late Jurassic of China: showing the first evidence for antiperistalsis in pterosaurs.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
  5. Article
  6. 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

5 authors at 2 institutions in 2 countries.

Martin QvarnströmDepartment of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Erik ElghDepartment of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Krzysztof OwockiInstitute of Paleobiology, Polish Academy of Sciences, Warsaw, Poland.
Per E AhlbergDepartment of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Grzegorz NiedźwiedzkiDepartment of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Uppsala University · SEInstitute of Paleobiology · PL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Diets of pterosaurs have mainly been inferred from indirect evidence such as comparative anatomy, associations of co-occurring fossils, and functional morphology. Gut contents are rare, and until now there is only a single coprolite (fossil dropping), with unidentified inclusions, known. Here we describe three coprolites collected from a palaeosurface with numerous pterosaur tracks found in early Kimmeridgian (Hypselocyclum Zone) intertidal deposits of the Wierzbica Quarry, Poland. The specimens' morphology and association to the tracks suggest a pterosaur producer. Synchrotron scans reveal numerous small inclusions, with foraminifera making up the majority of the identifiable ones. Other small remains include shells/carapaces (of bivalves, ostracods, and other crustaceans/arthropods) and bristles (some possibly of polychaete worms). The high density of the small shelly inclusions suggest that they were not accidently ingested, but constituted an important food source for the pterosaur(s), perhaps together with unpreserved soft-bodied animals. The combined evidence from the tracks and coprolites suggest a filter-feeding ctenochasmatid as the most likely tracemaker. If true, this significantly expands the bromalite record for this pterosaur group, which was previously only known from gastroliths. Moreover, this study also provides the first direct evidence of filter feeding in Jurassic pterosaurs and shows that they had a similar diet to the recent Chilean flamingo (

Indexed as

CoprolitesCtenochasmatidaeFilter feedingLate JurassicPalaeoecologyPterosaur

Identifiers

PMID31523493
PMCPMC6714960
OpenAlexW2969627818

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.