Amended key to Antatelson species:

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

– Body dorsally not smooth......................................................................................................................4

2. Gnathopod 2 carpus elongate, longer than broad............................. A. cuneatum Krapp-Schickel, 2006

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

3. Uropod 1 longer ramus much shorter than peduncle; gnathopods with parallel margins....................... .................................................................................... A. antennatum Bellan-Santini & Ledoyer, 1973

– Uropod 1 longer ramus subequal to peduncle; gnathopods distally widened ........................................... ...............................................................................................[ Thaumatelson herdmani Walker, 1906]

4. Head with rostrum, body without tubercles or processes, but keeled................................................... ...................................................................................... A. rostratum Bellan-Santini & Ledoyer, 1973

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

5. Peraeon and pleon segments with dorsal tubercles. .................................................... A. claudei sp. nov.

– Only pleon with tubercles, peraeon smooth..........................................................................................6

6. Pleon segments 1-3 with tubercles....................................................... A. tuberculatum Andres, 1989

– Pleon segment 1, 2 smooth, third segment with acute nasiform process, (one upright tubercle), without accompanying small processes............................................... A. walkeri (Chilton, 1912) probably syn. to A. cultricauda (K.H. Barnard, 1932) with accompanying small process.