Brown Box Crab - Lithodes Foramenutus Photographed on site at The Field Museum, Chigaco, for the Encyclopedia of Life project. Thanks to Alta Buden for making it all happen and to Jochen Cerber for allowing access to the crustacea specimensPhotosynthImages collection
As in many Lithodid crabs, the abdomen is broad and sculptured. The abdominal plates are softer in the middle. Note also the long bristly setae on the chelae.