the middle pterygiophore or radial, absent in many Teleostei

Dictionary of ichthyology. 2009.

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  • pterygiophore — the cartilage or bone on the outer end of which sit the median fin rays or spines and to which are attached erector and depressor fin muscles. There may be three cartilages that ossify into proximal, median and distal pterygiophores (or axonost,… …   Dictionary of ichthyology

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