A. Scott, 1909
Pr of 4 somites, its posterolateral corners flattened and prolonged into points. Ur of 5 somites in female and of 6 somites in male. CR short, setae very short. A1 7-8-segmented, with short setae and long sensory organs; male A1 prehensile on both sides. A2 3-segmented; Exp rudimentary, represented by 1-2 setae. Mxp 2-segmented, elongate, with terminal claw; male differs from female. P1 Enp 1-segmented, Exp 3-segmented. P2-4 with both rami 3-segmented. P5 rudimentary, with 2 long segments; symmetrical or almost in male (from Rose, 1933).
This family is monotypic, containing genus Clytemnestra Dana, 1848. Two species, Clytemnestra rostrata and Clytemnestra scutellata, are known from the South Atlantic.