Scythes, sickles and other blades: defining the diversity of pectoral fin morphotypes in Pachycormiformes.

Jeff J Liston, Anthony E Maltese, Paul H Lambers, Dominique Delsate, William E H Harcourt-Smith, Anneke H van Heteren

Abstract 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 1 paper.

0numbers the graph read from it

0cells of the map it votes in

1citing 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

1 citing paper in PubMed.

Fossilized leftover falls as sources of palaeoecological data: a 'pabulite' comprising a crustacean, a belemnite and a vertebrate from the Early Jurassic Posidonia Shale.Swiss journal of palaeontology · 2021
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.

Jeff J ListonVertebrate Palaeontology, SNSB-Bayerische Staatssammlung für Paläontologie und Geologie, Munich, Bavaria, Germany.ORCID 0000-0002-6763-5452

Anthony E MalteseRocky Mountain Dinosaur Resource Center, Woodland Park, CO, USA.

Paul H LambersUniversiteitsmuseum Utrecht, Utrecht University, Utrecht, Netherlands.

Dominique DelsateCentre de Recherche Scientifique/Paléontologie, Musée National d'histoire Naturelle de Luxembourg, Luxembourg, Luxembourg.ORCID 0000-0001-9644-4965

William E H Harcourt-SmithDivision of Paleontology, American Museum of Natural History, New York, NY, USA.

Anneke H van HeterenSektion Mammalogie, Zoologische Staatssammlung München, Staatliche Naturwissenschaftliche Sammlungen Bayerns, Munich, Germany.ORCID 0000-0003-1018-7991

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The traditional terminology of 'scythe' or 'sickle' shaped is observed to be flawed as an effective descriptor for pectoral fin shape in pachycormids. The diversity of pachycormid pectoral fin shapes is assessed across the 14 recognised genera that preserve complete pectoral fins, and improved terms are defined to more effectively describe their form, supported by anatomical observation and aspect ratio analysis of individual fins, and corroborated by landmark analysis. Three clear and distinct pectoral fin structural morphotypes emerge (falceform, gladiform, falcataform), reflecting a diversity of pachycormid lifestyles throughout the Mesozoic, from agile pursuit predator to slow-cruising suspension feeder.

Indexed as

Aspect ratioBonnerichthysCharacter creepLeedsichthysLifestyle indicatorPachycormidaePectoral fin morphotypePlanformProtosphyraenaSaurostomus

Identifiers

PMID31720097

DOI10.7717/peerj.7675

PMCPMC6842561

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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.