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<p>Two new moray eels, <i>Echidna awa</i> sp. nov. and <i>Echidna sagamiensis</i> sp. nov., are described on the basis of 23 (221.0–510.1 mm total length; TL) and eight (232.2–385.0 mm TL) specimens, respectively, from the Pacific coast of southern Japan. <i>Echidna awa</i>, distributed in Sagami Bay, Suruga Bay, and the Kumano-nada Sea, differs from all other congeners in having the following combination of characters: both jaws with few molariform and many conical teeth, without long canines; body dark reddish-brown, entirely covered with yellow vermiculate markings; oral cavity white; sensory pores on infraorbital and mandibular enclosed by rounded white blotches; white blotches on mandibular sometimes interconnected; anal-fin margin yellowish-white, rarely indistinct; predorsal vertebrae 4–7 (mode 5), preanal vertebrae 48–55 (53), and total vertebrae 123–132 (130). <i>Echidna sagamiensis</i>, distributed in Sagami Bay, Suruga bay, and the Kumano-nada Sea, differs from all other congeners in having the following combination of characters: both jaws with few molariform and many conical teeth, without long canines; short blunt snout (snout length 15.3–20.9% of head length); three supraorbital pores, four (rarely five) infraorbital pores, six mandibular pores, one (rarely two or three) branchial pores; body pale brown, entirely covered with numerous yellowish-white to yellowish-brown irregular spots and blotches; posterior dorsal and anal fins slightly yellowish-green; predorsal vertebrae 3–6 (mode 4), preanal vertebrae 52–54 (53), and total vertebrae 128–134 (131).</p>

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Two new species of the genus Echidna (Anguilliformes: Muraenidae) from the Pacific coast of southern Japan

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Atsumi Fujita,
  • Naoya Oomori,
  • Hiroshi Senou,
  • Hidetoshi Wada

摘要

Two new moray eels, Echidna awa sp. nov. and Echidna sagamiensis sp. nov., are described on the basis of 23 (221.0–510.1 mm total length; TL) and eight (232.2–385.0 mm TL) specimens, respectively, from the Pacific coast of southern Japan. Echidna awa, distributed in Sagami Bay, Suruga Bay, and the Kumano-nada Sea, differs from all other congeners in having the following combination of characters: both jaws with few molariform and many conical teeth, without long canines; body dark reddish-brown, entirely covered with yellow vermiculate markings; oral cavity white; sensory pores on infraorbital and mandibular enclosed by rounded white blotches; white blotches on mandibular sometimes interconnected; anal-fin margin yellowish-white, rarely indistinct; predorsal vertebrae 4–7 (mode 5), preanal vertebrae 48–55 (53), and total vertebrae 123–132 (130). Echidna sagamiensis, distributed in Sagami Bay, Suruga bay, and the Kumano-nada Sea, differs from all other congeners in having the following combination of characters: both jaws with few molariform and many conical teeth, without long canines; short blunt snout (snout length 15.3–20.9% of head length); three supraorbital pores, four (rarely five) infraorbital pores, six mandibular pores, one (rarely two or three) branchial pores; body pale brown, entirely covered with numerous yellowish-white to yellowish-brown irregular spots and blotches; posterior dorsal and anal fins slightly yellowish-green; predorsal vertebrae 3–6 (mode 4), preanal vertebrae 52–54 (53), and total vertebrae 128–134 (131).