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目 摘要 for Ophidiiformes
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主要参考文献 |
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目 |
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Ophidiiformes cusk eels |
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纲 |
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Teleostei |
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姊妹目 |
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Gadiformes 20 M years |
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参考文献 |
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最早的化石记录 |
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middle Tertiary |
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生存于 |
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海洋 |
淡水 |
半咸淡水 |
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附注 |
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Pelvic fins when present, inserted at level of preopercle or farther anterior (mental or jugular), zero to two soft rays in each, and occasionally with a spine; base of dorsal and anal fins long, extending to and usually joined with caudal fin; nostrils paired on each side; dorsal and anal fin pterygiophores more numerous than adjacent vertebrae (the ratio being about 1.8:1). |
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纲 词源 |
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Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335. |
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目 词源 |
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Greek, ophis = serpent + Latin, forma = shape (Ref. 45335). |
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科 |
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