protractor post-temporalis mechanism

protractor post-temporalis mechanism
a sound-producing mechanism in certain catfishes, e.g. Bagridae. A muscle runs from the neurocranium to the anterior margin of the post-temporo-supracleithrum which is directly associated with the anterior process of the 4th parapophysis which in turn is closely associated with the gas bladder wall. Movement of this muscle would vibrate the gas bladder and produce sound. See also drumming muscles and elastic spring mechanism

Dictionary of ichthyology. 2009.

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  • elastic spring mechanism — a structure consisting of thin spring like modified portions of the parapophysis of the 4th vertebrae (Müllerian process) which are attached to the skull by muscles and to the gas bladder. When the muscles contract and relax, the resultant… …   Dictionary of ichthyology

  • drum muscle — one of the muscles attached to the gas bladder which makes the contained gas vibrate and emit a drumming sound. In pimelodid catfishes, for example, a muscle originates on the parapophyses of the 4 vertebra and sometimes too from the neurocranium …   Dictionary of ichthyology

  • sonic muscles — muscles associated with the swimbladder used for sound production. See extrinsic and intrinsic sonic muscles, and drumming muscles, elastic spring mechanism and protractor post temporalis mechanism …   Dictionary of ichthyology

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