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Cephalaspis :: Cephalaspis (n.) A genus of fossil ganoid fishes found in the old red sandstone or Devonian formation. The head is large, and protected by a broad shield-shaped helmet prolonged behind into two lateral points..

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

Chondropterygii :: Chondropterygii (n. pl.) A group of fishes, characterized by cartilaginous fins and skeleton. It includes both ganoids (sturgeons, etc.) and selachians (sharks), but is now often restricted to the latter..

Coelacanth :: Coelacanth (a.) Having hollow spines, as some ganoid fishes..

Cycloganoidei :: Cycloganoidei (n. pl.) An order of ganoid fishes, having cycloid scales. The bowfin (Amia calva) is a living example..

Scale :: Scale (n.) One of the small, thin, membranous, bony or horny pieces which form the covering of many fishes and reptiles, and some mammals, belonging to the dermal part of the skeleton, or dermoskeleton. See Cycloid, Ctenoid, and Ganoid..

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

Rhomboganoidei :: Rhomboganoidei (n. pl.) Same as Ginglymodi.

Cycloganoid :: Cycloganoid (n.) One of the Cycloganoidei.

Selachostomi :: Selachostomi (n. pl.) A division of ganoid fishes which includes the paddlefish, in which the mouth is armed with small teeth..

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

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

Ganoidian :: Ganoidian (a. & n.) Ganoid.

Teleostei :: Teleostei (n. pl.) A subclass of fishes including all the ordinary bony fishes as distinguished from the ganoids.

Bichir :: Bichir (n.) A remarkable ganoid fish (Polypterus bichir) found in the Nile and other African rivers. See Brachioganoidei.

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..

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..

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..

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..

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

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