parhypural

parhypural
the last haemal spine that forms part of the the hypural plate. It is considered as a typical haemal spine or a hypural by authors but is recognised as distinct because it bears a hypurapophysis (q.v.), is notched to allow the caudal artery to exit the haemal canal and supports the lowermost principal caudal fin ray, e.g. in Siluriformes

Dictionary of ichthyology. 2009.

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  • hypurapophysis — a process on the arch of the parhypural (q.v.) in the caudal fin skeleton. It serves as the origin for the anterolateral portion of the hypochordal longitudinal muscle which inserts on the upper principal caudal fin rays, e.g. in Siluriformes …   Dictionary of ichthyology

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