Acartia plumosa

T. Scott, 1894

Females: Surface of Gns and Ur2 naked, but with numerous coarse spines along posterodorsal border. More characters can be accessed by backtracking the key:
Page 567

Males: Left P5 Exp2 with 1 very small terminal spine and very long inner spine, inserted at midlength, and which extends almost to distal border of its segment; posterior corner of Pr and Ur2-4 bordered by spines. More characters can be accessed by backtracking the key:
Page 983

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