Atrina rigida (John Lightfoot, 1786) Stiff Penshell And Symbiont

Atrina rigida (John Lightfoot, 1786) Stiff Penshell And Symbiont

    On mud flat, Kice Island, just south of Marco Island, Collier County, Florida 11/10/2010 | Digital image by Amy Tripp. A single Pinnotheres maculatus Say, 1818 [Mussel Crab], apparently a symbiont, is shown in residence.