ganoid การใช้

• Ganoid scales are nearly impenetrable and are excellent protection against predation.
• Although rare, ganoid scales are still being used as jewelry today.
• Unlike ganoid scales, they grow in size through additions to the margin.
• The thick ganoid scales of the gars are more primitive than those of the bowfin.
• The hard, ganoid scales on alligator gars protect them like a suit of armor.
• It typically grows to about and is armoured by rows of interlocking, rhomboidal ganoid scales.
• Ganoid scales are found in the sturgeons, paddlefishes, gars, bowfin, and bichirs.
• Both cycloid and ctenoid scales are overlapping, making them more flexible than cosmoid and ganoid scales.
• The gars have thick ganoid scales typical of sturgeons whereas the bowfin has thin bony scales like the teleosts.
• Gars have elongated bodies that are heavily armored with ganoid scales, and fronted by similarly elongated jaws filled with long, sharp teeth.
• Around 1859 the geologist and minister John Anderson discovered what turned out to be extensive sandstone deposits of ganoid fossilized fish in this area.
• He therefore adopted a classification which divided fish into four groups : Ganoids, Placoids, Cycloids and Ctenoids, based on the nature of the scales and other dermal appendages.
• Its body was covered in specialized ganoid scales; the upper side of each scale sported a small pin that perfectly fit into the hollow lower side of the next scale.
• A very early teleost, " Pholidophoris " had many primitive characteristics such as ganoid scales and a spine that was partially composed of cartilage, rather than bone.
• The Jewish law of kashrut, which only permits the consumption of fish with scales, forbids sturgeon, as they have ganoid scales instead of the permitted conservative groups do allow it.
• Cartilaginous fishes ( sharks and bony fishes are covered with the cycloid scales of salmon and carp, or the ctenoid scales of perch, or the ganoid scales of sturgeons and gars.
• Their scales are not like the scales of other fishes; rather, they are ganoid scales which are bone-like, diamond-shaped scales, often with serrated edges, and covered by an enamel-like substance.
• It had a streamlined body with small, triangular ganoid scales similar to those of the Acanthodii . " Cheirolepis " had well-developed fins which gave it speed and stability, and was probably an active predator.
• Tuna, swordfish, and some species of sharks show cosmoid ( fossil lungfish and coelacanths ), ganoid ( various fossil fish but also living gars and bichirs ), cycloid, and ctenoid ( these last two are found on most bony fish ).
• Through no fault of his own, Castelnau's name is attached to an Australian hoax . " " Ompax spatuloides " ", a supposed ganoid fish said to have been discovered in 1872 and named by Castelnau, was a joke originally directed at Karl Staiger, the director of the Brisbane Museum.