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.
Acknowledgements
I am thankful for the possibility to collaborate with the Laboratory of Carcinology, Royal Belgian Institute of Natural Sciences, Brussels, where I always met both interesting and helpful colleagues.