Ordre Résumé for Gonorynchiformes
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Réf. Princ. |
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Ordre |
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Gonorynchiformes milkfishes |
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Classe |
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Teleostei |
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Ordre frère |
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Cypriniformes 150 M years |
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Réf. |
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Premier signalement fossile |
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late Jurassic |
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Présent dans |
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Marin |
Eau douce |
Saumâtre |
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Remarque |
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Orbitosphenoid absent; parietals small; quadrate condyle far forward; teeth absent on fifth ceratobranchial; first three vertebrae specialized and associated with one or more cephalic ribs; suprabranchial (=epibranchial) organ present (consisting of lateral pouches in the posterior part of the branchial chamber behind the fourth epibranchials); mouth small; jaws toothless; no postcleithra; 5-7 hypural plates. |
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Classe Étymologie |
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Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335. |
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Ordre Étymologie |
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Greek, gonos = descent, origin + Greek, rhyngchos = snout, muzzle + Latin, forma = shape (Ref. 45335). |
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Familles |
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