;"A. (A.) spinaintus sp. n.";"A. (A.) incisa";"A. (A.) hawaiiensis";"A. (A.) aikawai"
"Carpopropodus of 3rd to 8th thoracopodal endopod";"3rd to 6th divided distally into 2 segments";Unsegmented;Unsegmented;"8th divided distally into 2 segments (at least)"
"Exopod of 4th male pleopod: length";"Anterior margin of 6th abdominal somite";"Backwards to level of the apical lobes of the telson";"Middle of telson";"Backwards to the posterior end of the 5th abdominal somite"
"Telson: apical cleft";Deep;Deep;Deep;Deep
"Spines on each lateral margin of telson";"12 or 13";"9 or 10";10;"11 or 12 (9 or 10) #"
"Spines on each lateral margin of telson cleft";8;"0 (un-armed)";"0 (un-armed)";"6 (4) #"