Giesbrecht, 1889
Females: Mx2 without strong spine-like setae; one seta on right CR much longer than others. More characters can be accessed by backtracking the key:
Page 659: Copepoda: Family Heterorhabdidae females
Males: One setae on right CR longer than others. More characters can be accessed by backtracking the key:
Page 881: Copepoda: Family Hetrorhabdidae males