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Paleichthyes :: Paleichthyes (n. pl.) A comprehensive division of fishes which includes the elasmobranchs and ganoids.

Polypteroidei :: Polypteroidei (n. pl.) A suborder of existing ganoid fishes having numerous fins along the back. The bichir, or Polypterus, is the type. See Illust. under Crossopterygian..

Shovelnose :: Shovelnose (n.) A ganoid fish of the Sturgeon family (Scaphirhynchus platyrhynchus) of the Mississippi and Ohio rivers; -- called also white sturgeon.

Ganocephala :: Ganocephala (n. pl.) A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes..

Placoganoidei :: Placoganoidei (n. pl.) A division of ganoid fishes including those that have large external bony plates and a cartilaginous skeleton.

Ganoidei :: Ganoidei (n. pl.) One of the subclasses of fishes. They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma. Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales..

Ginglymodi :: Ginglymodi (n.) An order of ganoid fishes, including the modern gar pikes and many allied fossil forms. They have rhombic, ganoid scales, a heterocercal tail, paired fins without an axis, fulcra on the fins, and a bony skeleton, with the vertebrae convex in front and concave behind, forming a ball and socket joint. See Ganoidel..

Rhomboganoid :: Rhomboganoid (n.) A ganoid fish having rhombic enameled scales; one of the Rhomboganoidei.

Dipnoi :: Dipnoi (n. pl.) A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix..

Amia :: Amia (n.) A genus of fresh-water ganoid fishes, exclusively confined to North America; called bowfin in Lake Champlain, dogfish in Lake Erie, and mudfish in South Carolina, etc. See Bowfin..

Paddlefish :: Paddlefish (n.) A large ganoid fish (Polyodon spathula) found in the rivers of the Mississippi Valley. It has a long spatula-shaped snout. Called also duck-billed cat, and spoonbill sturgeon..

Acipenser :: Acipenser (n.) A genus of ganoid fishes, including the sturgeons, having the body armed with bony scales, and the mouth on the under side of the head. See Sturgeon..

Ceratodus :: Ceratodus (n.) A genus of ganoid fishes, of the order Dipnoi, first known as Mesozoic fossil fishes; but recently two living species have been discovered in Australian rivers. They have lungs so well developed that they can leave the water and breathe in air. In Australia they are called salmon and baramunda. See Dipnoi, and Archipterygium..

Coccosteus :: Coccosteus (n.) An extinct genus of Devonian ganoid fishes, having the broad plates about the head studded with berrylike tubercles..

Amioidei :: Amioidei (n. pl.) An order of ganoid fishes of which Amia is the type. See Bowfin and Ganoidei.

Bowfin :: Bowfin (n.) A voracious ganoid fish (Amia calva) found in the fresh waters of the United States; the mudfish; -- called also Johnny Grindle, and dogfish..

Euganoidei :: Euganoidei (n. pl.) A group which includes the bony ganoids, as the gar pikes..

Spiracle :: Spiracle (n.) A tubular orifice communicating with the gill cavity of certain ganoid and all elasmobranch fishes. It is the modified first gill cleft.

Hyoganoidei :: Hyoganoidei (n. pl.) A division of ganoid fishes, including the gar pikes and bowfins..

Dinichthys :: Dinichthys (n.) A genus of large extinct Devonian ganoid fishes. In some parts of Ohio remains of the Dinichthys are abundant, indicating animals twenty feet in length..

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