Giesbrecht, 1888
Females: A1 exceeds beyond end of CR by 2 terminal segments. Dorsal outline of Ce significantly humped. More characters can be accessed by backtracking the key:
Page 710
Males: P4 Exp3 with about 10-12 teeth on distal part of segment. More characters can be accessed by backtracking the key:
Page 1199: Copepoda: Genus Acrocalanus males