Key to Antatelson species

1. Body smooth ................................................................................................................. 2

­ Body not smooth ........................................................................................................... 4

2. Gnathopod 2 carpus elongate, longer than broad ............................... A. cuneatum n.sp.

­ Gnathopod 2 carpus length subequal to width .............................................................. 3

3. Uropod 1 longer ramus much shorter than peduncle; gnathopods with parallel margins ....................................................................... A. antennatum Bellan­Santini & Ledoyer

­ Uropod 1 longer ramus subequal to peduncle; gnathopods distally widened ................ ................................................................................. [ Thaumatelson herdmani Walker]

4. Head with rostrum, body without tubercles or processes................................................ .......................................................................... A. rostratum Bellan­Santini & Ledoyer

­ Head without rostrum, body with tubercles or processes.............................................. 5

5. Pleon segment 1, 2 with a pair of dorsal tubercles, pleon segment 3 with 1 tubercule... ................................................................................................... A. tuberculatum Andres

­ Pleon segment 1, 2 smooth, third pleon with acute nasiform process .......................... 6

6. Pleon process upright, without accompanying smaller teeth; gnathopod 2 propodus distally wider ...................................................................................... A. walkeri Chilton

­ Pleon process oblique, with a smaller tooth on each side; gnathopod 2 propodus with parallel margins .................................................................. A. cultricauda K.H. Barnard