Examination of Gill Vasculature of Yellow Stingray, Urolophus jamaicensis (Urolophidae), by SEM Observations of Resin Casts
International Congress of European Ichthyologists “Fish Biodiversity”/ Trieste, Italy
Elasmobranchs, Anatomy, Gills, Urolophus, Vasculature
Examination of the gill vasculature of Urolophus jamaicensis confirms structural differences in urolophid gill vasculature compared with other elasmobranchs. Differences include: 1) absence of a septal corpus cavernosum; 2) presence of a vessel conneaing the afferent filament arteries near the tip of each filament; 3) a vessel, possibly an extension of the afferent filament artery, that runs along the top of the filamentcorpus cavernosum which may connect the afferent and efferent filament arteries at the tip of some filaments. Additionally, a constriction indicating the presence of a sphincter muscle was noted on the efferent lamellar ar‐teriole in U. jamaicensis. This structure has not been previously noted in urolophids. The vascular structures in Atlantic U. jamaicensisare similar to those previously described in Pacific U. paucimaculatus and U. mucosus.
Conference Proceeding Title
Italian Journal of Zoology Vol 65(Supplement 1)
Taylor & Francis Group, LLC
Sherman, Robin L. and Spieler, Richard E., "Examination of Gill Vasculature of Yellow Stingray, Urolophus jamaicensis (Urolophidae), by SEM Observations of Resin Casts" (1998). Biology Faculty Proceedings, Presentations, Speeches, Lectures. 315.