first uroneural
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stegural — a paired bony extension developed from the upper margin of the first uroneural of the caudal skeleton as exemplified in Salmonidae. It articulates with the first preural centrum and may represent the first uroneural fused with the first preural… … Dictionary of ichthyology
caudal bony plate — any ossified plate helping to support the tail fin. A name given to the first larger pair of uroneurals, situated on the curve of the upturned posterior end of the vertebral column. Preferably called first uroneural … Dictionary of ichthyology
