Moved from Amphiporeia. Most of the characters given in Bousfield (1965) to distinguish this species from Amphiporeia lawrenciana are not visible in this photo. However, based on the very good agreement of this specimen's antennae and, from what is clearly visible in these photos, uropod 3 and the gnathopods, to the original description of the species and Bousfield's description of the ranges of the species, I feel comfortable assigning this to A. virginiana.

Moved from Pontoporeia. I not only misidentified this amphipod but also failed to cite my source at first. Additional sources that helped support the correct identification are as follows: Shoemaker, 1933, Shoemaker, 1950 WoRMS.