Several specimens of Arctic lyre crabs from a DFO trawl survey in the St. Lawrence. Originally shown has Hyas coarctatus, var alutaceus. Species is now Hyas alutaceus.
Lesser Toad Crab -dorsal view. Appears to be of the form Hyas coarctatus alutaceus, now accepted as Hyas alutaceus. See: Pohle, G. W. 1990. A guide to decapod Crustacea from the Canadian Atlantic: Anomura and Brachyura. Can. Tech. Rep. Fish. Aquat. Sci. 1771 : iv + 30 p.
Lesser Toad Crab -male. Appears to be of the form Hyas coarctatus alutaceus, now accepted as Hyas alutaceus. See: Pohle, G. W. 1990. A guide to decapod Crustacea from the Canadian Atlantic: Anomura and Brachyura. Can. Tech. Rep. Fish. Aquat. Sci. 1771 : iv + 30 p.
A close-up of the rostrum, enlarged from above. A small tunicate is growing on the base. Photo by Dave Cowles, July 1999 We capture this crab mainly during deep benthic trawls in the San Juan channel