(Dana, 1849)
Females: P5 with 2 segments distal to B. More characters can be accessed by backtracking the key:
Page 547: Copepoda: Genus Calanopia females
Males: "Thumb" on right P5 Exp1-2 rudimentary or absent. More characters can be accessed by backtracking the key:
Page 977: Copepoda: Genus Calanopina males