Key to species of Atarbolana

1. Antennal flagellum with tufts of long and dense setae, pleotelson elongated.......................................2

- Antennal flagellum lacking long setae, pleotelson short.............................................. A. exoconta

2. Appendix masculina extending much beyond pleopod 2 endopod distal margin (by ± 0.5 its length).............. A. setosa

- Appendix masculina extending slightly beyond pleopod 2 endopod distal margin (by Ĺ 0.2 its length)...... A. makranensis