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<p>This study employs DNA barcoding to confirm <i>Parascorpaena mcadamsi</i> Fowler (Proc US Natl Mus 85:31–135, 1938) demonstrating notable phenotypic variations in specimens from the Arabian Sea, Northern Indian Ocean, expanding the known distribution of the species into this region. A specimen collected at 114&#xa0;m depth during a deep-sea survey which shared key traits with the species, including forwardly curved posterior lacrimal spines and two suborbital spines, Phenotypic variations in meristic counts and morphologically, specifically pectoral, dorsal fin rays, scale count and large blotch presence on dorsal fin were recorded. Mitochondrial cytochrome oxidase subunit I (cox1) gene sequencing of multiple specimens revealed genetic consistency, affirming that these phenotypically diverse individuals belong to the same species, <i>Parascorpaena mcadamsi</i>. This work underscores the importance of combining molecular and morphological approaches for accurate species delineation, particularly in biodiversity-rich regions like the Arabian Sea and calls for further taxonomic revision.</p>

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DNA Barcoding Confirms Parascorpaena mcadamsi (Fowler, 1938) (Scorpaenoidei: Scorpaenidae) as a Single Species with Phenotypic Variations in the Arabian Sea, Northern Indian Ocean

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Chinmay Kar,
  • Davood Nihal,
  • Hashim Manjebrayakath

摘要

This study employs DNA barcoding to confirm Parascorpaena mcadamsi Fowler (Proc US Natl Mus 85:31–135, 1938) demonstrating notable phenotypic variations in specimens from the Arabian Sea, Northern Indian Ocean, expanding the known distribution of the species into this region. A specimen collected at 114 m depth during a deep-sea survey which shared key traits with the species, including forwardly curved posterior lacrimal spines and two suborbital spines, Phenotypic variations in meristic counts and morphologically, specifically pectoral, dorsal fin rays, scale count and large blotch presence on dorsal fin were recorded. Mitochondrial cytochrome oxidase subunit I (cox1) gene sequencing of multiple specimens revealed genetic consistency, affirming that these phenotypically diverse individuals belong to the same species, Parascorpaena mcadamsi. This work underscores the importance of combining molecular and morphological approaches for accurate species delineation, particularly in biodiversity-rich regions like the Arabian Sea and calls for further taxonomic revision.