ganoid


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Related to ganoid: ganoid fish, Ganoid Scales

ganoid

(of fish) possessing ganoid scales, typified by a hard shiny layer of ganoine (an enamel-like substance) and the fact that they increase in thickness by adding layers all round, ganoine above, laminated from below. Compare COSMOID, PLACOID.
References in periodicals archive ?
Semionotids have heavy ganoid scales, but they are generally rhomboid in shape (Gemballa and Bartsch 2002; McCune 2004).
scorpius are rather similar in size to those of these other actinopterygians but the underlying tissue is different, as the teleost scales consist of laminated bone, while the polypteriform and lepisosteiform fishes have ganoid scales with hard, multilayered, enamel-like ganoine in their upper part.
Gar have heavy, interlocking ganoid scales, but a cousin, the bowfin, or mudfish, is nearly as ancient and lacks hard, armored scales.