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
This view of the undrside of the right chela shows the orange coloration with white teeth. Note the underside of the chela is almost smooth while the upper side has spines and setae.
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.