Females: Total length less than 5 mm. P5 inner spine more than twice as long as distalspine. More characters can be accessed by backtracking the key: Page 755
Males: P5 right B only slightly swollen. More characters can be accessed by backtracking the key: Page 1139 Page 1147: Copepoda: Genus Amallothrix males
Kingdom Animalia Phylum Crustacea Class Maxillopoda Subclass Copepoda Order Calanoida Family Scolecitrichidae Genus Amallothrix Species Amallothrix emarginata