Females: Posterior corners of Pd5 asymmetrical; that on left larger. More characters can be accessed by backtracking the key: Page 690
Males: Posterior corners of Pd5 asymmetrical; that on left larger. More characters can be accessed by backtracking the key: Page 949
Kingdom Animalia Phylum Crustacea Class Maxillopoda Subclass Copepoda Order Calanoida Family Arietellidae Genus Arietellus Species Arietellus giesbrechti