Evidence map›Paper›PMID 40146464›Full record

ArticleActa parasitologica2025

Redescription and Molecular Characterisation of Gnathia tridens Menzies & Barnard, 1959 (Isopoda: Gnathiidae), a Presumed Ubiquitous Nearshore Isopod from the Temperate Northern Pacific.

Anja Erasmus, Nico J Smit, Claire A Spitzer, Paul C Sikkel, Niel L Bruce, Kerry A Hadfield

Abstract read
In one paragraph

Article in Acta parasitologica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 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

6 authors.

Anja ErasmusWater Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa. 23599235@mynwu.ac.za.ORCID http://orcid.org/0000-0001-8505-8583
Nico J SmitWater Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa.ORCID http://orcid.org/0000-0001-7950-193X
Claire A SpitzerDepartment of Biology and Coastal and Marine Institute, San Diego State University, San Diego, USA.ORCID http://orcid.org/0000-0002-5471-7491
Paul C SikkelWater Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa.ORCID http://orcid.org/0000-0002-2652-7498
Niel L BruceWater Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa.ORCID http://orcid.org/0000-0003-4745-5048
Kerry A HadfieldWater Research Group, Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa.ORCID http://orcid.org/0000-0003-1308-6360

Funding

US National Science Foundation NSF OCE 2023420 and DEB 2231250
6 · The paper itself

Abstract

purposeGnathia tridens Menzies & Barnard, 1959, is redescribed from material collected from San Diego, California and compared to the original description, as well as material held at the Natural History Museum of Los Angeles County and the Santa Barbara Museum of Natural History. MATERIALS AND

methodsA full redescription is given based on both morphological and molecular characteristics of the male using light and scanning electron microscopy, and COI mtDNA and ITS2 rDNA genes, respectively.

resultsThe key distinguishing characters that set G. tridens apart from other congeners are the equally trifid mediofrontal process, the mandible with a large incisor; the mesioventral margin anterior tip dorsally visible; pereonite 4 with distinct visible anterior constriction; and the three proximal tubercles on the antenna articles. Based on the molecular data for COI, the closest congener differs with 122 base pairs.

conclusionTogether, the combined morphological and molecular characterisation will provide a foundation for future, taxonomic, phylogenetic and biogeographical studies within the genus Gnathia and the Gnathiidae.

Indexed as

IsopodaAnimalsCaliforniaDNA, MitochondrialDNA, RibosomalDNA, Ribosomal SpacerElectron Transport Complex IVMaleMicroscopy, Electron, ScanningPacific OceanPhylogenySequence Analysis, DNADNA, MitochondrialDNA, RibosomalDNA, Ribosomal SpacerElectron Transport Complex IVCaliforniaMarine parasitic isopodSystematic taxonomyTemperate Northern Pacific RealmTemporary fish parasite

Identifiers

PMID40146464
PMCPMC11950002

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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.