Examination of Gill Vasculature of Yellow Stingray, Urolophus jamaicensis (Urolophidae), by SEM Observations of Resin Casts
Italian Journal of Zoology
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. jamaicensis are similar to those previously described in Pacific U. paucimaculatus and U. mucosus.
Robin L. Sherman and Richard E. Spieler. 1998. Examination of Gill Vasculature of Yellow Stingray, Urolophus jamaicensis (Urolophidae), by SEM Observations of Resin Casts .Italian Journal of Zoology , (Supplement 1) : 431 -434. http://nsuworks.nova.edu/occ_facarticles/171.