592 Fishery Bulletin 88(3). 1990 



29 Pleura of first to fifth abdominal segments ending in 1-3 spines. Four large spines on dorsal mid- 

 line of carapace Lebbeus groenlandicus (Fabricius) 



Arctic to Cape Cod, Sea of Okhotsk, Puget Sound, 11-518 m (Butler 1980). 



Pleura of at least first to third abdominal segments pointed to rounded, but not ending in 1-3 



spines. One to 3 spines on dorsal midline of carapace 30 



30 Rostrum reduced to spine on frontal margin of carapace. Three spines on anterior dorsal midline 



of carapace 31 



Rostrum prominent, not reduced to spine. 1-2 spines on anterior dorsal midline of carapace 32 



31 Telson with 2 pair dorsal pines. No large, decurved spines below articular knobs of posterolateral 



margin of fourth and fifth abdominal somites Lebbeus catalepsis Jensen 



Strait of Juan de Fuca, low intertidal zone (Jensen 1987). 



Telson with 3 pair dorsal spines. Large, decurved spines present below articular knobs of postero- 

 lateral margin of fourth and fifth abdominal somites Lebbeus lagunae (Schmitt) 



Pacific Grove, California to Cedros Island, Baja California, 0-74 m (Wicksten 1978, 1988). 



32 Antennular peduncle extending to near middle of scaphocerite. Small subtidal species 33 



Antennular peduncle extending nearly to end of scaphocerite. Large species of continental slopes ... 35 



33 Dorsal surface of second abdominal segment without transverse furrow and fold. Rostrum not 



overreaching eye Lebbeus zebra (Leim) 



East coast of Canada, Bering Sea, Kamchatka, British Columbia, off Santa Rosa Island, California, 

 subtidal- 140 m (Wicksten and Mendez 1982). 



Dorsal surface of second abdominal segment with transverse furrow and fold. Rostrum overreach- 

 ing eye 34 



34 Rostrum short, not reaching end of first segment of antennular peduncle, with 2-5 dorsal spines 



and 1 ventral spine Lebbeus schrencki (Brazhnikov) 



Pribilof Islands to Sea of Japan to Passage Island, Strait of Georgia; 12-183 m (Butler 1980, Jensen 

 and Armstrong 1987). 



Rostrum reaching end of scaphocerite, with 5-7 dorsal spines and 3-4 ventral spines 



Lebbeus possjeticus Kobyakova 



Possjet Bay, USSR, Bering Island and off San Nicolas Island, California; 3-57 m (Wicksten and 

 Mendez 1982). 



35 First segment of antennular peduncle with 1 spine, bi- or trifurcated. Northern hemisphere . . . 



Lebbeus washingtonianus (Rathbun) 



Anthony Island, Queen Charlotte Islands to off San Clemente Island, California; 820-1808 m (Butler 



1980). 



First segment of antennular peduncle with 3 spines. Southern hemisphere 



Lebbeus bidentatus Zarenkov 



Peru and Chile, 1680 m (Zarenkov 1976). 



36 (20) Third maxilliped with exopod 37 



Third maxilliped without exopod 47 



37 No epipod on any pereopod 38 



Epipod on at least on first pereopod 40 



