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Synantherous :: Synangium (n.) The divided part beyond the pylangium in the aortic trunk of the amphibian heart.

Anallantoidea :: Anallantoidea (n. pl.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms..

Ichthyoidal :: Ichthyoidal (a.) Somewhat like a fish; having some of the characteristics of fishes; -- said of some amphibians.

Urodela :: Urodela (n. pl.) An order of amphibians having the tail well developed and often long. It comprises the salamanders, tritons, and allied animals..

Caecilian :: Caecilian (n.) A limbless amphibian belonging to the order Caeciliae or Ophimorpha. See Ophiomorpha.

Lagena :: Lagena (n.) The terminal part of the cochlea in birds and most reptiles; an appendage of the sacculus, corresponding to the cochlea, in fishes and amphibians..

Amphibial :: Amphibial (a. & n.) Amphibian.

Web :: Web (n.) The membrane which unites the fingers or toes, either at their bases, as in man, or for a greater part of their length, as in many water birds and amphibians..

Trachystomata :: Trachystomata (n. pl.) An order of tailed aquatic amphibians, including Siren and Pseudobranchus. They have anterior legs only, are eel-like in form, and have no teeth except a small patch on the palate. The external gills are persistent through life..

Axolotl :: Axolotl (n.) An amphibian of the salamander tribe found in the elevated lakes of Mexico; the siredon.

Tadpole :: Tadpole (n.) The young aquatic larva of any amphibian. In this stage it breathes by means of external or internal gills, is at first destitute of legs, and has a finlike tail. Called also polliwig, polliwog, porwiggle, or purwiggy..

Stegosauria :: Stegocephala (n. pl.) An extinct order of amphibians found fossil in the Mesozoic rocks; called also Stegocephali, and Labyrinthodonta..

Amphibia :: Amphibia (n. pl.) One of the classes of vertebrates.

Congo Snake :: Congo snake () An amphibian (Amphiuma means) of the order Urodela, found in the southern United States. See Amphiuma..

Amphibium :: Amphibium (n.) An amphibian.

Labyrinthodonta :: Labyrinthodonta (n. pl.) An extinct order of Amphibia, including the typical genus Labyrinthodon, and many other allied forms, from the Carboniferous, Permian, and Triassic formations. By recent writers they are divided into two or more orders. See Stegocephala..

Epipubis :: Epipubis (n.) A cartilage or bone in front of the pubis in some amphibians and other animals.

Amphibian :: Amphibian (n.) One of the Amphibia.

Ophiomorpha :: Ophiomorpha (n. pl.) An order of tailless amphibians having a slender, wormlike body with regular annulations, and usually with minute scales imbedded in the skin. The limbs are rudimentary or wanting. It includes the caecilians. Called also Gymnophiona and Ophidobatrachia..

Vertebrata :: Vertebrata (n. pl.) One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or cartilaginous vertebrae, together with Amphioxus in which the backbone is represented by a simple undivided notochord. The Vertebrata always have a dorsal, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia, and Lep

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