Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A radiograph reveals the skeletal anatomy of an adult skate. The metapterygium (false colored red in i) is the caudalmost basal fin cartilage. The plane of section through the metapterygium used for Figures 2–6 is indicated with a dashed line and x. Scale bar = 5 cm.
