Key to species of genus Archocentrus

14a(7a) Teeth tricuspid (except symphysial, sometimes truncate) ........................ Archocentrus multispinosus

14b All teeth pointed ................................................................................................................................ 15

15a(14b) Two opercular spots (Fig. 2); D. XVI; A. IX -XI ........................................ Archocentrus centrarchus

15b One opercular spot (part of longitudinal stripe) (Fig. 4); D. XVIII -XIX; A. XI -XII ........................... .............................................................................................................. …. Archocentrus spinosissimus