<p>The Dokdo sea lion (<i>Zalophus japonicus</i>), once widespread across Japan, the Korean Peninsula, and parts of Russia, went extinct by the mid-twentieth century. We report a nearly complete skeleton recovered from Gajae-cave on Ulleungdo, Korea, representing the most comprehensive physical record of the species from this region. High-resolution 3D scanning of bones was used to generate permanent digital models, ensuring long-term preservation and enabling global access for virtual analysis. These materials support comparative anatomy, functional morphology, genetic research, and stable-isotope reconstructions of diet and ecological roles, while illuminating East Sea ecosystems and underscoring the need for continued excavations on Ulleungdo.</p>

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Scientific Implications of the Comprehensive Skeletal Discovery of the Extinct Dokdo Sea Lion (Zalophus japonicus) from Ulleungdo, Korea

  • Yoon Ji Lee,
  • Myung Joon Kim,
  • Ji Seong Kim,
  • Seok Nam Kwak,
  • Sang Heon Lee

摘要

The Dokdo sea lion (Zalophus japonicus), once widespread across Japan, the Korean Peninsula, and parts of Russia, went extinct by the mid-twentieth century. We report a nearly complete skeleton recovered from Gajae-cave on Ulleungdo, Korea, representing the most comprehensive physical record of the species from this region. High-resolution 3D scanning of bones was used to generate permanent digital models, ensuring long-term preservation and enabling global access for virtual analysis. These materials support comparative anatomy, functional morphology, genetic research, and stable-isotope reconstructions of diet and ecological roles, while illuminating East Sea ecosystems and underscoring the need for continued excavations on Ulleungdo.