Neocalanus tonsus

(Brady, 1883)

Females: P1 B without large spine at base of inner seta. P2-P5 B with conspicuous, posterior surface spinules. More characters can be accessed by backtracking the key:
Page 635: Copepoda: Genus Neocalanus females

Males: P5 only slightly asymmetrical. More characters can be accessed by backtracking the key:
Page 1054

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