Niphargoides, G. O. Sars, 1894

Copilaș-Ciocianu, Denis & Sidorov, Dmitry, 2022, Taxonomic, ecological and morphological diversity of Ponto-Caspian gammaroidean amphipods: a review, Organisms Diversity & Evolution (New York, N. Y.) 22 (2), pp. 285-315 : 309-310

Key to species of Niphargoides

1. Posterior margin of pereopod 6 basis armed with a few short setae proximally ................................... N. grimmi

- Posterior margin of pereopod 6 basis armed with long setae along its entire length .............................................. 2

2. Ventral margin of coxal plate 4 armed with setae shorter than 1/2 of its length ....................... N. corpulentus

- Ventral margin of coxal plate 4 armed with setae longer than 1/2 of its length ......................................................... 3

3. Uropod 3 exopod bares a well-developed setal fan ..... ............................................................................ N. caspius

- Uropod 3 exopod lacks setal fan, armed with strong spines ........................................................... N. boltovskoyi