Biology Faculty Proceedings, Presentations, Speeches, Lectures

Examination of Gill Vasculature of Yellow Stingray, Urolophus jamaicensis (Urolophidae), by SEM Observations of Resin Casts

Event Name/Location

International Congress of European Ichthyologists “Fish Biodiversity”/ Trieste, Italy

Presentation Date

8-1998

Document Type

Conference Proceeding

Proceeding Title

Italian Journal of Zoology Vol 65(Supplement 1)

ISSN

1125-0003

Keywords

Elasmobranchs, Anatomy, Gills, Urolophus, Vasculature

Description

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.

DOI

10.1080/11250009809386860

Publisher

Taylor & Francis Group, LLC

First Page

431

Last Page

434

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