Branchiostegal spine absent

No trace of hepatic crest

Longitudinal and transverse sutures present

Fifth pereopod exceeding antennal scale by length of dactyl

Petasma with distolateral lobes spout-like and as long as distomedian ones

In females, anterior plate of thelycum semicircular, articulating to intermediate plate and with a median groove which continues on intermediate plate, the latter is broad, quadrate and continuous to posterior sternal plate