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Abstract

Consistent and ongoing biodiversity exploration is crucial for understanding diversity patterns over time and space and evaluating conservation efforts. Despite increased research in the western Indo-Pacific, recent ichthyological studies continue to reveal high rates of new species discoveries and records. In this study, the presence, general morphology, scale and otolith shape variations, osteology, distribution, and molecular phylogenetic affinity of the banded grouper Epinephelus radiatus have been documented/presented from the northwest of the Oman Sea. The morphological and meristic characteristics of specimens were well fited with E. radiatus. The scales were cycloid type, being oval/ ovoid, oval/ true oval, and oval/ reversed ovoid in different body regions of fish. The lateral line scale has a wide and long canal extending from the posterior end of the scale to just before the anterior margin, becoming wider in the anterior region. The otolith shape is elliptic-oblong, with a crenate/ irregular dorsal margin, sinuates ventral margin, and dentate and irregular posterior margin. Sulcus groove medium, heterosulcoid; opening ostial. Ostium funnel-like. Cauda tubular, strongly curved, ending close to the ventral margin. Colliculum heteromorph. Crista superior and inferior are well-developed and ridgelike. The vertebral column includes 10 abdominal and 14 caudal vertebrae, with a total vertebral count of 24. DNA barcoding based on mitochondrial COI sequences revealed that some species of the genus Epinephelus including E. radiatus are nested within the Mycteroperca clade, and thus both the genera are not monophyletic.

Keywords

Oman Sea Biodiversity DNA barcoding DNA taxonomy Otolith and scale morphology Osteology

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The authors transfer the copyrights of their papers to the Iranian Society of Ichthyology. However, the information could be used in accordance with the Creative Commons licence (Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Author Biography

Sorour ECHRESHAVI , Ichthyology and Molecular Systematics Research Laboratory, Zoology Section, Department of Biology, School of Science, Shiraz University, Shiraz, Iran.

Biology Department

How to Cite
ECHRESHAVI , S., & ESMAEILI, H. R. (2024). Morpho-molecular approaches reveal presence of an additional grouper fish, the oblique-banded grouper, <i>Epinephelus radiatus</i> (Teleostei: Epinephelidae), in the northeast coast of the Oman Sea with a note on its scale, otolith and caudal skeleton morphology. Iranian Journal of Ichthyology, 11(2), 79–92. https://doi.org/10.22034/iji.v11i2.1018
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