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Research Article


Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops

Osama M. El-barasi, Ahmad M. Azab, Mariem Feki, Esmail Shakman, Mohamed A. M. El-tabakh.


Abstract
Background:
A genetic analysis was conducted to identify and classify sharks from the families Squalidae and Squatinidae at the Eastern Libyan coast of the Mediterranean Sea.

Aim:
This study was based on COI gene barcoding, and the sequences obtained were matched with global reference databases to ascertain their taxonomic identity and genetic diversity ratio.

Methods:
The sequences were then deposed to the GenBank database through the BankIt submission system where the following accession numbers were assigned: Squalus mitsukurii (PV717998), Squalus megalops (PV718644), Squatina oculata (PV716693), Squatina squatina (PV738303), and Squatina aculeata (PV719649). The phylogenetic evolution tree was constructed by applying the neighbor-joining method (Chromas Pro v1.5 Beta).

Results:
S. mitsukurii was the first confirmed genetic record of the Mediterranean Sea, whereas S. megalops was the first confirmed genetic record of the Libyan coast. In addition, S. oculata, S. squatina, and S. aculeata were genetically confirmed in Libyan waters for the first time. Haplotype network analysis revealed a clear distinction of genetic distance among the species, with little variation among the species. Nucleotide diversity and Tajima D were computed, and both showed a strong deviation from neutrality, which could have been caused by either selective pressures or past demographic changes.

Conclusion:
Collectively, these findings contribute significantly to the ichthyofaunal diversity of Libya and the Mediterranean Sea in general, and they further demonstrate the power of DNA barcoding as a means of recording and preserving shark diversity.

Key words: Squalus mitsukurii; Squalus megalops; Mediterranean Sea; Libya; DNA barcoding.


 
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How to Cite this Article
Pubmed Style

El-barasi OM, Azab AM, Feki M, Shakman E, El-tabakh MAM. Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Vet. J.. 2026; 16(2): 817-823. doi:10.5455/OVJ.2026.v16.i2.5

Web Style

El-barasi OM, Azab AM, Feki M, Shakman E, El-tabakh MAM. Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. https://www.openveterinaryjournal.com/?mno=291696 [Access: February 27, 2026]. doi:10.5455/OVJ.2026.v16.i2.5

AMA (American Medical Association) Style

El-barasi OM, Azab AM, Feki M, Shakman E, El-tabakh MAM. Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Vet. J.. 2026; 16(2): 817-823. doi:10.5455/OVJ.2026.v16.i2.5


Vancouver/ICMJE Style

El-barasi OM, Azab AM, Feki M, Shakman E, El-tabakh MAM. Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Vet. J.. (2026), [cited February 27, 2026]; 16(2): 817-823. doi:10.5455/OVJ.2026.v16.i2.5


Harvard Style

El-barasi, O. M., Azab, . A. M., Feki, . M., Shakman, . E. & El-tabakh, . M. A. M. (2026) Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Vet. J., 16 (2), 817-823. doi:10.5455/OVJ.2026.v16.i2.5


Turabian Style

El-barasi, Osama M., Ahmad M. Azab, Mariem Feki, Esmail Shakman, and Mohamed A. M. El-tabakh. 2026. Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Veterinary Journal, 16 (2), 817-823. doi:10.5455/OVJ.2026.v16.i2.5


Chicago Style

El-barasi, Osama M., Ahmad M. Azab, Mariem Feki, Esmail Shakman, and Mohamed A. M. El-tabakh. "Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops." Open Veterinary Journal 16 (2026), 817-823. doi:10.5455/OVJ.2026.v16.i2.5


MLA (The Modern Language Association) Style

El-barasi, Osama M., Ahmad M. Azab, Mariem Feki, Esmail Shakman, and Mohamed A. M. El-tabakh. "Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops." Open Veterinary Journal 16.2 (2026), 817-823. Print. doi:10.5455/OVJ.2026.v16.i2.5


APA (American Psychological Association) Style

El-barasi, O. M., Azab, . A. M., Feki, . M., Shakman, . E. & El-tabakh, . M. A. M. (2026) Genetic taxonomical study of the families squalidae and squatinidae with the first mediterranean record of Squalus mitsukurii and the first Libyan record of Squalus megalops. Open Veterinary Journal, 16 (2), 817-823. doi:10.5455/OVJ.2026.v16.i2.5


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