Key to Stenotanais

1. Uropod basal article longer than pleotelson.................................................... S. macrodactylus

- Uropod basal article shorter than pleotelson................................................................ 2

2. Uropodal exopod bi-articulate, not reaching beyond first endopod article.......................................... 3

- Uropodal exopod uni-articulate and oar-shaped, reaching at least to 0.75 of entire endopod length.......... S. hamicauda

3. Antennule article 4 almost twice as long as article 3. Cheliped carpal shield present. Endopod with one flat and wide seta dis- tally. Exopod without flat and wide setae......................................................... S. crassiseta

- Antennule article 4 only marginally longer than article 3. Cheliped carpal shield absent. Endopod without flat and wide seta. Exopod with one flat and wide seta................................................................ S. arenasi