cosmoid scale

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cosmoid scale Type of scale found only in fossil lung-fish (Dipnoi), and in Crossopterygii, including the living coelacanth. The thick scales are composed of layers of vitrodentine (harder than dentine and containing little organic matter), followed by cosmine (a type of dentine perforated by branching canals), and finally by layers of vascular and laminated bone underneath.

cosmoid scale

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cosmoid scale A type of scale found only in fossil lungfish (Dipneusti), and in Crossopterygii, including the living coelacanth. The thick scales are composed of layers of vitrodentine, followed by cosmine, and finally by layers of vascular and laminated bone underneath.

cosmoid scale

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cosmoid scale See scales.