Evidence map›Paper›PMID 41588029›Full record

ArticleScientific data2026

First Chromosome-level Genome Assembly and Annotation of an Endangered Freshwater Stingray (Fontitrygon garouaensis) from Africa.

Lotanna Micah Nneji, Segun Olayinka Oladipo, Oyetola Olusegun Oyebanji, Adeola Oluwakemi Ayoola, Olatunde Omotoso, Ifeanyi Christopher Nneji, Kehinde Moruff Adelakun

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In one paragraph

Article in Scientific data, 2026. 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.

  1. 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

7 authors.

Lotanna Micah NnejiDepartment of Biology, Howard University, Washington, DC, USA. Lotannamicah.nneji@howard.edu.
Segun Olayinka Oladipo *Department of Biology, Howard University, Washington, DC, USA.
Oyetola Olusegun Oyebanji *Botanical Research Institute of Texas, Fort Worth, Texas, USA.
Adeola Oluwakemi AyoolaDepartment of Human Genetics, University of California, Los Angeles, USA.
Olatunde OmotosoKey Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
Ifeanyi Christopher NnejiDepartment of Marine Biology, Shantou University, Shantou, China.
Kehinde Moruff AdelakunDepartment of Wildlife and Ecotourism Management, Federal College of Wildlife Management, New Bussa, Nigeria.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fontitrygon garouaensis (Smooth Freshwater Stingray) is an evolutionarily distinct and globally endangered species and is currently the only stingray known to be strictly adapted to African freshwater systems. Lack of a reference genome has limited studies of its adaptive evolution and genomic architecture. Here, we present the first chromosome-level genome assembly of F. garouaensis using a hybrid approach that integrates PacBio HiFi long reads, Illumina short reads, and Hi-C chromatin conformation capture. The assembly spans 4.19 Gb with 41 anchored chromosomes, a scaffold N50 of 86.49 Mb, and a contig N50 of 16.58 Mb. Overall, 84.07% of the genome was assigned to chromosomes, with 65.27% repetitive elements. BUSCO analysis showed 93.3% completeness, confirming a highly contiguous genome. We annotated 29,804 protein-coding genes, with 98.28% functionally annotated. Repetitive elements comprised 65.27% of the genome, including lineage-specific expansions of DNA transposons (7.13%) and LTRs (19.31%). This genomic resource establishes a foundation for systematic, evolutionary, and conservation research on this threatened species.

Indexed as

ChromosomesEndangered SpeciesGenomeSkates, FishAfricaAnimalsFresh WaterMolecular Sequence Annotation

Identifiers

PMID41588029
PMCPMC12946260

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LicenceCC BY-NC-ND
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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.