cosmoid scale

cosmoid scale defined in 1951 year

cosmoid scale - cosmoid scale;
cosmoid scale - Scale typical of primitive Choanichthyes. Three layers; outer like a layer of fused teeth (denticles), consisting of dentine with pulp cavities and thin superficial covering of modified, enamel-like dentine (ganoine); middle of loose, vascular bone; inner layer of bone in compact laminated sheets. Scale grows thicker by adding to inner layer only (Compare with: Ganoid scale).

near cosmoid scale in Knolik

letter "C"
start from "CO"

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