Scottocalanus securifrons

(T. Scott, 1894)

Females: P5 2-segmented, terminal segment with 2 spines, one very long (reaching Ur3) sub-apical spine directed backwards. A2 Exp longer than Enp. Mx1 Li1 with 3 posterior setae. More characters can be accessed by backtracking the key:
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Males: R in form of strongly chitinized plate distally divided into 2 thick rami. Mx1 Li1 usually with 3 posterior setae. More characters can be accessed by backtracking the key:
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