ArticleMolecular biology reports2026
Mitogenomic and phylogenomic analyses identify a cohesive Western Atlantic lineage within the Narcine complex (Torpediniformes: Narcinidae).
Article in Molecular biology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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.
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.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
Abstract
backgroundAccurate species delimitation within electric rays of the genus Narcine has been hindered by overlapping morphological characters and limited molecular resolution in previous single-locus studies. This study aims to evaluate phylogenetic relationships and species boundaries within the Narcine species complex across the Western Atlantic using complete mitochondrial genomes. METHODS AND
resultsSeven complete mitogenomes were newly assembled from individuals representing distinct morphotypes sampled across geographically widespread Western Atlantic localities and analyzed together with publicly available reference sequences. Mitochondrial protein-coding genes (PCGs) were examined using concatenated nucleotide and amino acid datasets under partitioned maximum-likelihood frameworks. Both approaches recovered highly congruent topologies, consistently supporting a single, well-defined western Atlantic mitochondrial lineage with low internal divergence (0.04-2.13%). Species delimitation analyses based on multiple methods yielded partially congruent results but consistently identified a dominant lineage encompassing all Atlantic samples. In contrast, two Colombian reference mitogenomes formed a separate and highly divergent lineage relative to the Atlantic group, despite showing moderate divergence between them. Comparative mitogenomic analyses revealed conserved genome organization, nucleotide composition bias, codon usage, and transfer RNA (tRNA) structures. All PCGs evolved under strong purifying selection, with Ka/Ks ratios well below unity.
conclusionsThese results support mitochondrial genetic continuity across the Western Atlantic Narcine populations and do not provide mitochondrial evidence for multiple evolutionary lineages within the Western Atlantic. The marked mitochondrial divergence of Colombian reference mitogenomes highlights potential issues in sequence attribution and underscores the importance of data curation. Overall, complete mitochondrial genomes provide a robust framework for species delimitation and future integrative taxonomic assessments within Narcine.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.