Southern Quahog

Southern Quahog
Mercenaria campechiensis (Gmelin, 1791)
Family Veneridae

The Southern Quahog is a large thick ridged clam up to 7" which is common on the S. Hutchinson Island beaches. Dispite its size it can be quite beautiful.


Several Southern Quahogs (S. Hutcxhinson Island- December 2020)

Harry Lee: "The persistence of the commarginal (concentric) ribs over the outer shell is the most salient shell characteristic n the distinction from the Northern Quahog."

* * * *
Shell size to 150 mm; shell thick, more inflated than in Mercenaria mercenaria, ovate-trigonal. Sculpture of irregular lines, more separated than in M. mercenaria. Lines never absent in middle of valve. Lunule as long as wide. Color dull-white to gray. Internally sometimes stained with purple. This species hybridizes with M. mercenaria in the southeastern United States. Juvenile shells (additional photo, size 30 mm) have purple zigzag lines; do not confuse these with Chione elevata or Chionopsis intapurpurea.


Site Map | Printable View | © 2008 - 2021 Your Company | Powered by mojoPortal | XHTML 1.0 | CSS | Design by styleshout