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Order Summary for Echinorhiniformes
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Main Ref |
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Order |
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Echinorhiniformes bramble sharks |
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Class |
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Elasmobranchii |
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Sister Order |
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Squatiniformes 155 M years |
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Ref. |
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First Fossil Record |
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late Jurassic |
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Occurs in |
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Marine |
Fresh |
Brackish |
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Remark |
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Two dorsal fins, with or without spines; anal fin absent; five gill slits; spiracles present; nictitating lower eyelid absent. Many species are known from deep water. |
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Class etymology |
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Order etymology |
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Families |
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( n = 1 ) Echinorhinidae |
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