Definición de ganoid en inglés:
1(Of fish scales) hard and bony with a shiny enamelled surface. Compare with ctenoid and placoid.
- They also possess a heterocercal caudal fin and remnants of ganoid scales; both are uncommon among extant actinopterygians.
- Gar species in North America are easily recognized by their long snouts, sharply toothed jaws, non-overlapping and diamond shaped ganoid scales, and posterior placement of dorsal and anal fins on the body.
- This species has specialized scales, which are called ganoid scales, and it has nostrils or nares on tentacles that protrude from the head.
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A primitive fish that has ganoid scales, e.g. a sturgeon or freshwater garfish.
- In the collection of ganoids the most complete is representation of Acipenseriformes, mainly of acipenserids proper.
- In the ganoids the upper lobe of the tail fin is the largest.
- The ganoids had already reached their evolutionary climax in the Permian and Triassic, some 270-190 million years ago; today they are few in number when compared with the dominant bony fishes.
Definición de ganoid en:
- Inglés de EE.UU. dictionary
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