caudal fin ventral procurrent ray
caudal fin ventral procurrent ray
"Caudal procurrent ray that forms part of the anterior ventral series of lepidotrichia of the caudal fin that may be associated with a neural spine or a epural or an uroneural (dorsal series) and with a hemal spine of a preural vertebra (ventral series). A caudal procurrent ray is an unpaired median bone."