Body large. Caudal furca large, elongated. Caudal process larger than that of any other species of Pleopis and Podon, parthenogenetic female:Podon intermedius, female. Caudal part in detail: Podon intermedius, caudal part.
Antennae: exopod of segments 1-4 with 0,1,2,4 swimming setae. Exopods of thoracic limbs l-4 with 2,1,1,2 setae (Podon intermedius, exopods).
Female brood pouch small, oval to hemispherical. Resting egg (a specimen from off Woods Hole, Massachusetts, USA; Onbé and Grice, unpublished) spherical, large, 0.27 mm in diameter; outer membrane with complex array of groove structures.
Total length female (standard length): 1.1-1.2 mm (1.0 mm).
Total length male: 0.6--1.0 mm (0.9-1.0 mm).