duplex (Dalla Torre 1896) {Sakagami & Munakata 1972 (diagnose); Ebmer 1995: 532 (gp. caréné)} {Distribution: endémique du Japon}
= Halictus familiaris Smith 1879, nec Erichson 1841
= Halictus leoninus Vachal 1903
= Halictus rimalis Pérez 1905
= Halictus angularis Pérez 1905
= Halictus constrictus Matsumura 1912
= Halictus matsumurai Hirashima 1957