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| Stirrup; middle ear ossicle ("little column") that conducts sound waves from an eardrum to the capsule. |
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| Second cervical vertebrae, below the Atlas atthe top of the backbone. Rotates the head along a vertical axis. |
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| The first vertebra; holds up the skull and rocks it to nod "yes." |
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| Teeth having the enamel deeply folded to form a labyrinthine structure; can also refer to a group of large fossil amphibians of the late Devonian to early Triassic periods having such teeth. |
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| Animals having four limbs |
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| Tetrapodomorpha is a clade of vertebrates, consisting of tetrapods (four-limbed vertebrates) and their closest sarcopterygian relatives that are more closely related to living tetrapods than to living lungfish. |
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| Lobe-finned fishes; Fleshy, muscles within fin (humerus or femur) |
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| Lissamphibia is a biological subclass of animal that includes all recent amphibians. |
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| An order of amphibians having the tail well developed and often long. It comprises the salamanders, tritons, and allied animals. |
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| The caecilians, a small order of wormlike, legless animals in the class Amphibia. |
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