baseost
the distal radial or pterygiophore supporting the fin rays. Also called intercalarium

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • intercalarium — 1) the third of the four Weberian ossicles, q.v., comprising an ascending process, an horizontal process where the interossicular ligaments attach connecting the scaphium, intercalarium and tripus), and a peg like articular process with the… …   Dictionary of ichthyology

  • 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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