Archaeomysis grebnitzkii


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North Pacific to southern California.
Occurs in the wave wash zone of the beach, in the breaker zone and at night in surface waters.
? - 14 mm
Useful Facts or Characters: 

Telson is cleft, with two equal parts; each part with small spinules along the margins.  The telson has widely-spaced spines along the lateral margins.  (Archaeomysis marculata=Archaeomysis grebnitzkii)

Antennal scale with a large tooth on its external edge.  Third pleopod of adult male is modified and much longer than the other four pleopods.

Natural History: 

Has been caught in surface waters at night off SIO Pier and can be found in the breaker zone.


Kathman, R.D., W.C. Austin, J.C. Saltman & J.D. Fulton (1986) Identification manual to the Mysidacea and Euphausiacea of the northeast Pacific. Canadian Special Publication of Fisheries and Aquatic Sciences 93:1-411.